{"id":29721,"date":"2026-07-01T16:21:14","date_gmt":"2026-07-01T08:21:14","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=29721"},"modified":"2026-07-01T16:21:43","modified_gmt":"2026-07-01T08:21:43","slug":"dc-spd-ucpv-selection-guide-for-solar-pv-systems","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/","title":{"rendered":"Gu\u00eda de selecci\u00f3n de DC SPD Ucpv para sistemas de energ\u00eda solar FV"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"29721\" class=\"elementor elementor-29721\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-375cb66 e-flex e-con-boxed e-con e-parent\" data-id=\"375cb66\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5d30d25 elementor-widget elementor-widget-html\" data-id=\"5d30d25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n  .ucpv-article {\r\n    max-width: 860px;\r\n    margin: 0 auto;\r\n    padding: 20px 18px 70px;\r\n    color: #1f2933;\r\n    font-size: 16.5px;\r\n    line-height: 1.72;\r\n  }\r\n\r\n  .ucpv-article * {\r\n    box-sizing: border-box;\r\n  }\r\n\r\n  .ucpv-article p {\r\n    margin: 0 0 18px;\r\n  }\r\n\r\n  .ucpv-article a {\r\n    color: #004898;\r\n    text-decoration: none;\r\n  }\r\n\r\n  .ucpv-article a:hover {\r\n    text-decoration: underline;\r\n  }\r\n\r\n  .ucpv-kicker {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    gap: 8px;\r\n    margin-bottom: 14px;\r\n    padding: 6px 12px;\r\n    border-radius: 999px;\r\n    background: #eef5ff;\r\n    color: #004898;\r\n    font-size: 13px;\r\n    font-weight: 700;\r\n    letter-spacing: 0.02em;\r\n  }\r\n\r\n  .ucpv-intro {\r\n    margin-bottom: 28px;\r\n    padding: 26px 26px 24px;\r\n    border: 1px solid #d9e9f8;\r\n    border-left: 5px solid #004898;\r\n    border-radius: 18px;\r\n    background: #f7fbff;\r\n  }\r\n\r\n  .ucpv-intro .ucpv-lead {\r\n    font-size: 21px;\r\n    line-height: 1.48;\r\n    color: #0f2747;\r\n    font-weight: 700;\r\n    margin-bottom: 16px;\r\n  }\r\n\r\n  .ucpv-article h2 {\r\n    margin: 46px 0 16px;\r\n    color: #0f2747;\r\n    font-size: 30px;\r\n    line-height: 1.24;\r\n    font-weight: 800;\r\n  }\r\n\r\n  .ucpv-article h3 {\r\n    margin: 28px 0 12px;\r\n    color: #0f2747;\r\n    font-size: 23px;\r\n    line-height: 1.3;\r\n    font-weight: 760;\r\n  }\r\n\r\n  .ucpv-article ul,\r\n  .ucpv-article ol {\r\n    margin: 0 0 22px 22px;\r\n    padding: 0;\r\n  }\r\n\r\n  .ucpv-article li {\r\n    margin: 6px 0;\r\n  }\r\n\r\n  .ucpv-note,\r\n  .ucpv-warning,\r\n  .ucpv-cta,\r\n  .ucpv-quick {\r\n    margin: 26px 0;\r\n    padding: 22px 24px;\r\n    border-radius: 18px;\r\n  }\r\n\r\n  .ucpv-quick {\r\n    background: #f7fbff;\r\n    border: 1px solid #d9e9f8;\r\n  }\r\n\r\n  .ucpv-note {\r\n    background: #f7fbff;\r\n    border: 1px solid #d9e9f8;\r\n    border-left: 5px solid #004898;\r\n  }\r\n\r\n  .ucpv-warning {\r\n    background: #fff8f2;\r\n    border: 1px solid #f3d4b8;\r\n    border-left: 5px solid #e98224;\r\n  }\r\n\r\n  .ucpv-warning h3,\r\n  .ucpv-note h3,\r\n  .ucpv-quick h2,\r\n  .ucpv-cta h2 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  .ucpv-table-wrap {\r\n    width: 100%;\r\n    overflow-x: auto;\r\n    margin: 18px 0 28px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 16px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ucpv-table {\r\n    width: 100%;\r\n    min-width: 720px;\r\n    border-collapse: collapse;\r\n    font-size: 15.5px;\r\n    line-height: 1.5;\r\n  }\r\n\r\n  .ucpv-table th {\r\n    background: #004898;\r\n    color: #fff;\r\n    font-weight: 760;\r\n    text-align: left;\r\n    padding: 14px 16px;\r\n    border-right: 1px solid rgba(255,255,255,0.25);\r\n  }\r\n\r\n  .ucpv-table td {\r\n    padding: 14px 16px;\r\n    border-top: 1px solid #d9e9f8;\r\n    border-right: 1px solid #e8eef6;\r\n    vertical-align: top;\r\n  }\r\n\r\n  .ucpv-table tr:nth-child(even) td {\r\n    background: #f9fcff;\r\n  }\r\n\r\n  .ucpv-img-block {\r\n    margin: 28px 0 34px;\r\n  }\r\n\r\n  .ucpv-img-block img {\r\n    display: block;\r\n    width: 100%;\r\n    height: auto;\r\n    border-radius: 18px;\r\n    border: 1px solid #d9e9f8;\r\n    box-shadow: 0 10px 26px rgba(0, 72, 152, 0.08);\r\n  }\r\n\r\n  .ucpv-img-caption {\r\n    margin-top: 10px;\r\n    color: #667085;\r\n    font-size: 14px;\r\n    line-height: 1.5;\r\n    text-align: center;\r\n  }\r\n\r\n  .ucpv-two-col {\r\n    display: grid;\r\n    grid-template-columns: 1fr 1fr;\r\n    gap: 18px;\r\n    margin: 22px 0 30px;\r\n  }\r\n\r\n  .ucpv-card {\r\n    padding: 20px 20px 18px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 18px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ucpv-card h3 {\r\n    margin-top: 0;\r\n    font-size: 20px;\r\n  }\r\n\r\n  .ucpv-card ul {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  .ucpv-flow {\r\n    margin: 20px 0 30px;\r\n    padding: 0;\r\n    list-style: none;\r\n    counter-reset: flow;\r\n  }\r\n\r\n  .ucpv-flow li {\r\n    counter-increment: flow;\r\n    position: relative;\r\n    margin: 10px 0;\r\n    padding: 13px 16px 13px 52px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 14px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ucpv-flow li:before {\r\n    content: counter(flow);\r\n    position: absolute;\r\n    left: 15px;\r\n    top: 13px;\r\n    width: 26px;\r\n    height: 26px;\r\n    border-radius: 50%;\r\n    background: #004898;\r\n    color: #fff;\r\n    font-size: 14px;\r\n    font-weight: 800;\r\n    line-height: 26px;\r\n    text-align: center;\r\n  }\r\n\r\n  .ucpv-cta {\r\n    background: #eef5ff;\r\n    border: 1px solid #c9def5;\r\n    text-align: left;\r\n  }\r\n\r\n  .ucpv-btn-row {\r\n    display: flex;\r\n    flex-wrap: wrap;\r\n    gap: 12px;\r\n    margin-top: 18px;\r\n  }\r\n\r\n  .ucpv-btn,\r\n  .ucpv-btn-secondary {\r\n    position: relative !important;\r\n    isolation: isolate !important;\r\n    overflow: visible !important;\r\n    display: inline-flex !important;\r\n    align-items: center !important;\r\n    justify-content: center !important;\r\n    min-height: 44px;\r\n    padding: 11px 18px;\r\n    border-radius: 999px;\r\n    font-weight: 760;\r\n    line-height: 1.2;\r\n    text-decoration: none !important;\r\n    white-space: normal !important;\r\n    transition: all 0.2s ease;\r\n  }\r\n\r\n  .ucpv-btn {\r\n    background: #004898;\r\n    color: #fff !important;\r\n    border: 1px solid #004898;\r\n  }\r\n\r\n  .ucpv-btn:hover {\r\n    background: #003b7d;\r\n    border-color: #003b7d;\r\n    transform: translateY(-1px);\r\n  }\r\n\r\n  .ucpv-btn-secondary {\r\n    background: #fff;\r\n    color: #004898 !important;\r\n    border: 1px solid #b9d3ef;\r\n  }\r\n\r\n  .ucpv-btn-secondary:hover {\r\n    background: #f7fbff;\r\n    transform: translateY(-1px);\r\n  }\r\n\r\n  .ucpv-article .ucpv-btn span,\r\n  .ucpv-article .ucpv-btn-secondary span {\r\n    display: inline-block !important;\r\n    position: relative !important;\r\n    z-index: 10 !important;\r\n    opacity: 1 !important;\r\n    visibility: visible !important;\r\n    line-height: 1.2 !important;\r\n    font-size: 15.5px !important;\r\n    font-weight: 760 !important;\r\n    text-align: center !important;\r\n    text-indent: 0 !important;\r\n    letter-spacing: normal !important;\r\n    transform: none !important;\r\n    filter: none !important;\r\n    pointer-events: none;\r\n  }\r\n\r\n  .ucpv-article .ucpv-btn span {\r\n    color: #ffffff !important;\r\n  }\r\n\r\n  .ucpv-article .ucpv-btn-secondary span {\r\n    color: #004898 !important;\r\n  }\r\n\r\n  .ucpv-article .ucpv-btn::before,\r\n  .ucpv-article .ucpv-btn::after,\r\n  .ucpv-article .ucpv-btn-secondary::before,\r\n  .ucpv-article .ucpv-btn-secondary::after {\r\n    z-index: 1 !important;\r\n  }\r\n\r\n  .ucpv-related {\r\n    margin-top: 46px;\r\n    padding: 24px;\r\n    border: 1px solid #d9e9f8;\r\n    border-radius: 18px;\r\n    background: #fff;\r\n  }\r\n\r\n  .ucpv-related h2 {\r\n    margin-top: 0;\r\n  }\r\n\r\n  .ucpv-related ul {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  .ucpv-faq {\r\n    margin-top: 42px;\r\n  }\r\n\r\n  .ucpv-faq-item {\r\n    padding: 20px 0;\r\n    border-bottom: 1px solid #e6edf5;\r\n  }\r\n\r\n  .ucpv-faq-item h3 {\r\n    margin: 0 0 10px;\r\n    font-size: 20px;\r\n  }\r\n\r\n  .ucpv-faq-item p {\r\n    margin-bottom: 0;\r\n  }\r\n\r\n  @media (max-width: 768px) {\r\n    .ucpv-article {\r\n      padding: 14px 14px 56px;\r\n      font-size: 16px;\r\n      line-height: 1.68;\r\n    }\r\n\r\n    .ucpv-intro {\r\n      padding: 20px 18px;\r\n      border-radius: 16px;\r\n    }\r\n\r\n    .ucpv-intro .ucpv-lead {\r\n      font-size: 19px;\r\n    }\r\n\r\n    .ucpv-article h2 {\r\n      font-size: 25px;\r\n      margin-top: 36px;\r\n    }\r\n\r\n    .ucpv-article h3 {\r\n      font-size: 21px;\r\n    }\r\n\r\n    .ucpv-two-col {\r\n      grid-template-columns: 1fr;\r\n    }\r\n\r\n    .ucpv-note,\r\n    .ucpv-warning,\r\n    .ucpv-cta,\r\n    .ucpv-quick,\r\n    .ucpv-related {\r\n      padding: 19px 17px;\r\n      border-radius: 16px;\r\n    }\r\n\r\n    .ucpv-img-block img {\r\n      border-radius: 14px;\r\n    }\r\n\r\n    .ucpv-btn,\r\n    .ucpv-btn-secondary {\r\n      width: 100%;\r\n    }\r\n  }\r\n<\/style>\r\n\r\n<article class=\"ucpv-article\">\r\n\r\n  <section class=\"ucpv-intro\">\r\n    <div class=\"ucpv-kicker\">Solar PV DC SPD Selection<\/div>\r\n    <p class=\"ucpv-lead\">Not sure whether to choose a 600V, 1000V, or 1500V DC SPD for a solar PV system?<\/p>\r\n    <p>One parameter should be checked before the order is confirmed: <strong>Ucpv<\/strong>.<\/p>\r\n    <p>For solar PV systems, DC SPD Ucpv should be selected according to the real maximum DC voltage that may appear at the SPD terminals, not only the system name printed on the inverter or combiner box.<\/p>\r\n    <p>This guide explains how to choose DC SPD Ucpv for 600V, 1000V, and 1500V solar PV systems, especially for PV combiner boxes, inverter DC inputs, EPC projects, distributors, and OEM panel orders.<\/p>\r\n  <\/section>\r\n\r\n  <section class=\"ucpv-quick\">\r\n    <div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#quick-answer-how-to-choose-dc-spd-ucpv\" >Quick Answer: How to Choose DC SPD Ucpv<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#need-a-quick-model-recommendation\" >Need a Quick Model Recommendation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#what-does-ucpv-mean-on-a-dc-spd\" >What Does Ucpv Mean on a DC SPD?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#why-ucpv-selection-matters-in-solar-pv-systems\" >Why Ucpv Selection Matters in Solar PV Systems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#do-not-choose-dc-spd-only-by-%e2%80%9c600v-1000v-or-1500v%e2%80%9d\" >Do Not Choose DC SPD Only by \u201c600V, 1000V, or 1500V\u201d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#the-basic-selection-logic\" >The Basic Selection Logic<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#why-pv-string-voc-is-more-important-than-working-voltage\" >Why PV String Voc Is More Important Than Working Voltage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#600v-dc-spd-selection\" >600V DC SPD Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#1000v-dc-spd-selection\" >1000V DC SPD Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#1500v-dc-spd-selection\" >1500V DC SPD Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#600v-vs-1000v-vs-1500v-dc-spd-selection\" >600V vs 1000V vs 1500V DC SPD Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#is-higher-ucpv-always-better\" >Is Higher Ucpv Always Better?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#what-happens-if-ucpv-is-too-low\" >What Happens If Ucpv Is Too Low?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#what-happens-if-ucpv-is-too-high\" >What Happens If Ucpv Is Too High?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#can-i-use-a-1500v-dc-spd-in-a-1000v-pv-system\" >Can I Use a 1500V DC SPD in a 1000V PV System?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#ucpv-and-up-do-not-confuse-these-two-parameters\" >Ucpv and Up: Do Not Confuse These Two Parameters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#dc-spd-ucpv-for-combiner-box-manufacturers\" >DC SPD Ucpv for Combiner Box Manufacturers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#dc-spd-ucpv-for-solar-epc-projects\" >DC SPD Ucpv for Solar EPC Projects<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#dc-spd-ucpv-for-pv-distributors\" >DC SPD Ucpv for PV Distributors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#dc-spd-ucpv-for-oem-buyers\" >DC SPD Ucpv for OEM Buyers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#type-2-or-type-12-does-it-change-ucpv\" >Type 2 or Type 1+2: Does It Change Ucpv?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#what-information-should-you-send-before-ordering\" >What Information Should You Send Before Ordering?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#send-your-pv-system-requirement\" >Send Your PV System Requirement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#common-mistakes-to-avoid\" >Common Mistakes to Avoid<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#recommended-selection-flow\" >Recommended Selection Flow<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#example-1000v-pv-combiner-box\" >Example: 1000V PV Combiner Box<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#example-1500v-utility-scale-pv-project\" >Example: 1500V Utility-Scale PV Project<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#how-leeyee-supports-dc-spd-ucpv-selection\" >How LEEYEE Supports DC SPD Ucpv Selection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#faq\" >FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#need-help-choosing-dc-spd-ucpv\" >Need Help Choosing DC SPD Ucpv?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/#related-reading\" >Related Reading<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"quick-answer-how-to-choose-dc-spd-ucpv\"><\/span>Quick Answer: How to Choose DC SPD Ucpv<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>For solar PV systems, choose a DC SPD with Ucpv equal to or higher than the maximum DC voltage that can appear at the SPD terminals.<\/p>\r\n    <p>In practice, you should check PV system voltage, PV string Voc, lowest site temperature, inverter maximum DC input voltage, combiner box rated voltage, and the required SPD type.<\/p>\r\n\r\n    <div class=\"ucpv-table-wrap\">\r\n      <table class=\"ucpv-table\">\r\n        <thead>\r\n          <tr>\r\n            <th>PV System<\/th>\r\n            <th>Common DC SPD Ucpv<\/th>\r\n            <th>Typical Use<\/th>\r\n            <th>Main Check Before Ordering<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td>600V DC system<\/td>\r\n            <td>600V DC<\/td>\r\n            <td>Small PV systems, off-grid solar, low-voltage strings<\/td>\r\n            <td>Confirm corrected string voltage is below 600V.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>1000V DC system<\/td>\r\n            <td>1000V DC<\/td>\r\n            <td>Commercial PV systems, rooftop PV, standard combiner boxes<\/td>\r\n            <td>Check corrected Voc and inverter maximum DC voltage.<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td>1500V DC system<\/td>\r\n            <td>1500V DC<\/td>\r\n            <td>Utility-scale solar plants, large EPC projects<\/td>\r\n            <td>Confirm every DC component is rated for 1500V.<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p>This table gives a quick direction, but it is not a final engineering decision. Before placing an order, always confirm the corrected PV string open-circuit voltage and the rated voltage of the full DC circuit.<\/p>\r\n  <\/section>\r\n\r\n  <div class=\"ucpv-img-block\">\r\n    <img decoding=\"async\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/600v-1000v-1500v-dc-spd-ucpv-selection-table.webp\" alt=\"600V 1000V and 1500V DC SPD Ucpv selection table for solar PV systems\" loading=\"lazy\" \/>\r\n    <div class=\"ucpv-img-caption\">600V, 1000V, and 1500V DC SPD Ucpv selection table for common solar PV applications.<\/div>\r\n  <\/div>\r\n\r\n  <section class=\"ucpv-cta\">\r\n    <h2><span class=\"ez-toc-section\" id=\"need-a-quick-model-recommendation\"><\/span>Need a Quick Model Recommendation?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>Send your PV system voltage, module Voc, string configuration, and combiner box requirement. Our team can help check whether a 600V, 1000V, or 1500V DC SPD is suitable for your project.<\/p>\r\n    <div class=\"ucpv-btn-row\">\r\n      <a class=\"ucpv-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\"><span>Request DC SPD Selection Help<\/span><\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-does-ucpv-mean-on-a-dc-spd\"><\/span>What Does Ucpv Mean on a DC SPD?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>Ucpv means <strong>maximum continuous operating voltage for photovoltaic systems<\/strong>.<\/p>\r\n  <p>In simple words, it is the maximum DC voltage that the SPD can withstand continuously under normal PV operation.<\/p>\r\n  <p>This is different from surge current ratings.<\/p>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Parameter<\/th>\r\n          <th>What It Means<\/th>\r\n          <th>Why It Matters<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Ucpv<\/td>\r\n          <td>Maximum continuous operating voltage for PV systems<\/td>\r\n          <td>Shows whether the SPD can safely stay connected to the DC circuit.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>In<\/td>\r\n          <td>Nominal discharge current<\/td>\r\n          <td>Shows the normal surge discharge capability under a defined test waveform.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Imax<\/td>\r\n          <td>Maximum discharge current<\/td>\r\n          <td>Shows the maximum surge current capability under a defined test waveform.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Up<\/td>\r\n          <td>Voltage protection level<\/td>\r\n          <td>Shows the residual voltage during a surge event.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>For solar PV systems, Ucpv is especially important because PV strings can produce high DC voltage even when there is little or no load current.<\/p>\r\n  <p>The highest voltage often appears in cold weather and open-circuit conditions. That is why a DC SPD should not be selected only by looking at the nominal PV system label.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"why-ucpv-selection-matters-in-solar-pv-systems\"><\/span>Why Ucpv Selection Matters in Solar PV Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A solar PV system is not the same as a normal AC distribution board.<\/p>\r\n  <p>On the DC side, there is no natural zero-crossing like in AC circuits. DC voltage can remain present continuously. If the SPD is not correctly rated for the PV DC system, it may be exposed to stress during normal operation.<\/p>\r\n\r\n  <p>For a PV combiner box or inverter cabinet, wrong Ucpv selection can create real project problems:<\/p>\r\n  <ul>\r\n    <li>SPD indicator turns red too early.<\/li>\r\n    <li>MOV module ages faster.<\/li>\r\n    <li>Thermal disconnector operates.<\/li>\r\n    <li>Maintenance team needs repeated replacement.<\/li>\r\n    <li>Combiner box approval is delayed.<\/li>\r\n    <li>OEM buyer rejects the BOM.<\/li>\r\n    <li>Distributor receives quality complaints from the field.<\/li>\r\n  <\/ul>\r\n\r\n  <div class=\"ucpv-note\">\r\n    <h3>In B2B orders, Ucpv is not just a datasheet number.<\/h3>\r\n    <p>It affects product reliability, project acceptance, and after-sales cost. For combiner box manufacturers, EPC buyers, distributors, and OEM projects, it should be confirmed before the quotation is finalized.<\/p>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"do-not-choose-dc-spd-only-by-%e2%80%9c600v-1000v-or-1500v%e2%80%9d\"><\/span>Do Not Choose DC SPD Only by \u201c600V, 1000V, or 1500V\u201d<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>Many buyers ask:<\/p>\r\n  <p><strong>\u201cWe have a 1000V solar system. Can we use your 1000V DC SPD?\u201d<\/strong><\/p>\r\n  <p>Usually, yes. But before confirming the model, a professional supplier should ask one more question:<\/p>\r\n  <p><strong>What is the corrected maximum open-circuit voltage of the PV string?<\/strong><\/p>\r\n  <p>A PV system marked as 1000V usually means the system is designed not to exceed 1000V DC. But the actual PV string voltage depends on the module Voc, the number of modules in series, and the lowest local temperature.<\/p>\r\n  <p>If the corrected string voltage is too close to the system limit, the system design should be reviewed.<\/p>\r\n\r\n  <div class=\"ucpv-warning\">\r\n    <h3>Do not use a higher-voltage SPD to hide a string design problem.<\/h3>\r\n    <p>A 1500V SPD does not make a 1000V inverter, fuse holder, isolator, cable, or combiner box become 1500V rated.<\/p>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"the-basic-selection-logic\"><\/span>The Basic Selection Logic<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>For most solar PV projects, the selection logic is simple:<\/p>\r\n\r\n  <ol class=\"ucpv-flow\">\r\n    <li>Confirm the PV system class: 600V, 1000V, or 1500V.<\/li>\r\n    <li>Check the module Voc from the module datasheet.<\/li>\r\n    <li>Confirm how many modules are connected in series.<\/li>\r\n    <li>Apply the low-temperature correction.<\/li>\r\n    <li>Compare the corrected string Voc with the system voltage limit.<\/li>\r\n    <li>Choose a DC SPD Ucpv rating suitable for that voltage class.<\/li>\r\n    <li>Confirm SPD type, pole configuration, and certification.<\/li>\r\n  <\/ol>\r\n\r\n  <p>The simple rule is:<\/p>\r\n  <p><strong>DC SPD Ucpv should be equal to or higher than the maximum DC voltage that can appear at the SPD terminals.<\/strong><\/p>\r\n  <p>But this rule must be used together with the full system design. The inverter, combiner box, DC switch, fuse holder, cable, connector, and SPD should all match the same voltage class.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"why-pv-string-voc-is-more-important-than-working-voltage\"><\/span>Why PV String Voc Is More Important Than Working Voltage<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>PV buyers sometimes look only at the operating voltage.<\/p>\r\n  <p>That is not enough.<\/p>\r\n  <p>The PV string can reach its highest voltage when the circuit is open and the temperature is low. This value is called open-circuit voltage, or Voc.<\/p>\r\n  <p>When PV modules are connected in series, their Voc values add together.<\/p>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Item<\/th>\r\n          <th>Example<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Module Voc<\/td>\r\n          <td>49V<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Modules in series<\/td>\r\n          <td>18<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>String Voc at standard test condition<\/td>\r\n          <td>882V<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>At first, this may look suitable for a 1000V PV system. But in cold weather, module voltage can rise. After temperature correction, the actual maximum string voltage may be higher.<\/p>\r\n  <p>This is why corrected Voc must be checked before selecting the DC SPD.<\/p>\r\n\r\n  <div class=\"ucpv-img-block\">\r\n    <img decoding=\"async\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/pv-string-voltage-to-dc-spd-ucpv-selection-diagram.webp\" alt=\"PV string voltage to DC SPD Ucpv selection diagram for solar PV systems\" loading=\"lazy\" \/>\r\n    <div class=\"ucpv-img-caption\">PV string voltage to DC SPD Ucpv selection process: module Voc, series modules, temperature correction, voltage class, and SPD selection.<\/div>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"600v-dc-spd-selection\"><\/span>600V DC SPD Selection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A 600V DC SPD is normally used in lower-voltage solar PV systems.<\/p>\r\n  <p>It may be suitable for:<\/p>\r\n  <ul>\r\n    <li>Small PV systems<\/li>\r\n    <li>Off-grid solar systems<\/li>\r\n    <li>Low-voltage PV strings<\/li>\r\n    <li>Small combiner boxes<\/li>\r\n    <li>Battery-related DC protection panels, when the application matches the SPD rating<\/li>\r\n  <\/ul>\r\n\r\n  <p>Before selecting a 600V DC SPD, confirm that the corrected maximum PV string voltage is below the SPD Ucpv rating.<\/p>\r\n  <p>Also confirm that the inverter, isolator, fuse holder, cable, and connector are suitable for the same DC voltage class.<\/p>\r\n\r\n  <div class=\"ucpv-warning\">\r\n    <h3>A 600V DC SPD should not be used in a 1000V or 1500V PV system.<\/h3>\r\n    <p>If it is installed in a higher-voltage circuit, the SPD may be stressed during normal operation. This can cause early aging, overheating, red indicator status, or thermal disconnection.<\/p>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"1000v-dc-spd-selection\"><\/span>1000V DC SPD Selection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A 1000V DC SPD is one of the most common choices for commercial PV systems.<\/p>\r\n  <p>It is often used in:<\/p>\r\n  <ul>\r\n    <li>Commercial rooftop PV systems<\/li>\r\n    <li>Standard PV combiner boxes<\/li>\r\n    <li>String inverter systems<\/li>\r\n    <li>Solar distribution panels<\/li>\r\n    <li>OEM PV protection cabinets<\/li>\r\n    <li>Distributor stock programs for common solar projects<\/li>\r\n  <\/ul>\r\n\r\n  <p>For a 1000V PV system, the corrected PV string Voc should stay within the 1000V system design limit.<\/p>\r\n  <p>If the corrected Voc is safely below the limit, a 1000V DC SPD is usually the normal selection.<\/p>\r\n  <p>If the corrected Voc is very close to 1000V, check the string design carefully. In many cases, the correct solution is to reduce the number of modules in series or review the system design.<\/p>\r\n\r\n  <div class=\"ucpv-warning\">\r\n    <h3>Do not simply replace a 1000V SPD with a 1500V SPD.<\/h3>\r\n    <p>This should only be considered when the full DC system is designed and approved for that voltage level.<\/p>\r\n  <\/div>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"1500v-dc-spd-selection\"><\/span>1500V DC SPD Selection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A 1500V DC SPD is used for high-voltage PV systems.<\/p>\r\n  <p>It is common in:<\/p>\r\n  <ul>\r\n    <li>Utility-scale solar plants<\/li>\r\n    <li>Large ground-mounted PV projects<\/li>\r\n    <li>1500V string inverter systems<\/li>\r\n    <li>High-voltage PV combiner boxes<\/li>\r\n    <li>EPC solar projects<\/li>\r\n    <li>OEM PV protection cabinets for large projects<\/li>\r\n  <\/ul>\r\n\r\n  <p>A 1500V PV system allows higher string voltage and lower current for the same power level. This can reduce cable loss and balance-of-system cost in large installations.<\/p>\r\n  <p>But it also requires every DC component to be correctly rated.<\/p>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>For 1500V Projects, Check<\/th>\r\n          <th>Why It Matters<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Inverter maximum DC input voltage<\/td>\r\n          <td>The inverter must be rated for the full DC voltage class.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Combiner box rated voltage<\/td>\r\n          <td>The panel label and internal components must match 1500V DC design.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>DC isolator or switch rating<\/td>\r\n          <td>DC switching at high voltage needs suitable DC-rated components.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>DC fuse and fuse holder rating<\/td>\r\n          <td>Fuse coordination must match the PV circuit voltage.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Cable and connector voltage rating<\/td>\r\n          <td>The full DC circuit must be coordinated, not only the SPD.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>DC SPD Ucpv<\/td>\r\n          <td>The SPD must be designed for the PV DC voltage class.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>A 1500V DC SPD should be selected as part of a complete 1500V DC system. It should not be used as a shortcut to solve over-voltage in a 1000V system.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"600v-vs-1000v-vs-1500v-dc-spd-selection\"><\/span>600V vs 1000V vs 1500V DC SPD Selection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Selection Point<\/th>\r\n          <th>600V DC SPD<\/th>\r\n          <th>1000V DC SPD<\/th>\r\n          <th>1500V DC SPD<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Typical project type<\/td>\r\n          <td>Small PV or off-grid solar<\/td>\r\n          <td>Commercial PV systems<\/td>\r\n          <td>Utility-scale solar plants<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Common installation<\/td>\r\n          <td>Small combiner box or DC panel<\/td>\r\n          <td>PV combiner box, inverter DC side<\/td>\r\n          <td>High-voltage combiner box, large PV array<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Main buyer<\/td>\r\n          <td>Installer, small system builder<\/td>\r\n          <td>EPC, distributor, panel builder<\/td>\r\n          <td>EPC, OEM buyer, project contractor<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Main risk<\/td>\r\n          <td>Used in a higher-voltage system<\/td>\r\n          <td>Cold-temperature Voc ignored<\/td>\r\n          <td>Selected blindly for a lower-voltage system<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Key check<\/td>\r\n          <td>Corrected string voltage<\/td>\r\n          <td>Inverter max DC voltage and corrected Voc<\/td>\r\n          <td>Full 1500V system coordination<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>The best choice is not always the highest voltage rating. The best choice is the Ucpv rating that matches the real PV system voltage with a proper safety margin.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"is-higher-ucpv-always-better\"><\/span>Is Higher Ucpv Always Better?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>No.<\/p>\r\n  <p>Higher Ucpv does not automatically mean better protection.<\/p>\r\n  <p>If Ucpv is too low, the SPD may fail early because it is exposed to excessive continuous voltage.<\/p>\r\n  <p>If Ucpv is much higher than needed, the voltage protection level may also be higher. This may reduce protection coordination for the equipment behind the SPD.<\/p>\r\n\r\n  <div class=\"ucpv-two-col\">\r\n    <div class=\"ucpv-card\">\r\n      <h3>If Ucpv Is Too Low<\/h3>\r\n      <ul>\r\n        <li>The SPD may age faster.<\/li>\r\n        <li>The indicator may turn red early.<\/li>\r\n        <li>Thermal disconnection may occur.<\/li>\r\n        <li>Combiner box maintenance cost may increase.<\/li>\r\n      <\/ul>\r\n    <\/div>\r\n    <div class=\"ucpv-card\">\r\n      <h3>If Ucpv Is Too High<\/h3>\r\n      <ul>\r\n        <li>The voltage protection level may be higher.<\/li>\r\n        <li>Protection coordination may be weaker.<\/li>\r\n        <li>Product cost may increase.<\/li>\r\n        <li>OEM approval may become confusing.<\/li>\r\n      <\/ul>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <p>For solar PV projects, the goal is not to buy the highest voltage SPD. The goal is to select the right SPD for the actual DC system.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-happens-if-ucpv-is-too-low\"><\/span>What Happens If Ucpv Is Too Low?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>If the DC SPD Ucpv is lower than the real maximum PV voltage, the SPD may be stressed during normal operation.<\/p>\r\n  <p>Possible results include:<\/p>\r\n  <ul>\r\n    <li>Faster MOV aging<\/li>\r\n    <li>Abnormal heating<\/li>\r\n    <li>Red indicator window<\/li>\r\n    <li>Thermal disconnection<\/li>\r\n    <li>Early module failure<\/li>\r\n    <li>Repeated combiner box maintenance<\/li>\r\n    <li>Higher replacement cost<\/li>\r\n    <li>Project complaint after installation<\/li>\r\n  <\/ul>\r\n\r\n  <p>This mistake often happens when a 600V SPD is used in a 1000V PV system, or when a 1000V SPD is selected without checking corrected cold-weather Voc.<\/p>\r\n  <p>For EPC projects and OEM panels, this can become a quality issue, not just a component issue.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-happens-if-ucpv-is-too-high\"><\/span>What Happens If Ucpv Is Too High?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>If the DC SPD Ucpv is much higher than required, the SPD may withstand the system voltage, but it may not provide the best protection coordination.<\/p>\r\n  <p>Possible results include:<\/p>\r\n  <ul>\r\n    <li>Higher voltage protection level<\/li>\r\n    <li>Less sensitive surge clamping<\/li>\r\n    <li>Higher product cost<\/li>\r\n    <li>Mismatch with project specification<\/li>\r\n    <li>Confusion during panel approval<\/li>\r\n    <li>Unnecessary stock complexity for distributors<\/li>\r\n  <\/ul>\r\n\r\n  <p>This is why a 1500V DC SPD should not be selected blindly for every PV project. For a 1000V combiner box, first check whether the whole DC system is designed for 1000V or 1500V.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"can-i-use-a-1500v-dc-spd-in-a-1000v-pv-system\"><\/span>Can I Use a 1500V DC SPD in a 1000V PV System?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A 1500V DC SPD has a higher continuous operating voltage rating than a 1000V DC SPD.<\/p>\r\n  <p>But that does not mean it is always the right replacement.<\/p>\r\n  <p>For a 1000V PV system, the inverter, combiner box, isolator, fuse holder, cable, and connectors are usually selected around a 1000V DC design.<\/p>\r\n  <p>If the corrected PV string voltage exceeds the 1000V design limit, the system design should be reviewed.<\/p>\r\n\r\n  <div class=\"ucpv-note\">\r\n    <h3>Using a 1500V SPD does not upgrade the whole system to 1500V.<\/h3>\r\n    <p>A 1500V SPD may be considered only when the project engineer confirms that the system voltage rating, protection coordination, certification requirement, and panel design allow it.<\/p>\r\n  <\/div>\r\n\r\n  <p>For OEM orders, do not change 1000V SPD to 1500V SPD only because the higher-voltage model is available in stock.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"ucpv-and-up-do-not-confuse-these-two-parameters\"><\/span>Ucpv and Up: Do Not Confuse These Two Parameters<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>Ucpv and Up are different.<\/p>\r\n  <p><strong>Ucpv<\/strong> is the maximum continuous operating voltage.<\/p>\r\n  <p><strong>Up<\/strong> is the voltage protection level during a surge.<\/p>\r\n  <p>A DC SPD must have a suitable Ucpv so it can remain safely connected to the PV circuit.<\/p>\r\n  <p>It also needs a suitable Up value so the inverter or other protected equipment receives a lower residual surge voltage.<\/p>\r\n\r\n  <p>This is why Ucpv should not be checked alone. A good DC SPD selection should consider:<\/p>\r\n  <ul>\r\n    <li>Ucpv<\/li>\r\n    <li>In<\/li>\r\n    <li>Imax<\/li>\r\n    <li>Up<\/li>\r\n    <li>Iscpv, when required for PV SPD specification<\/li>\r\n    <li>Type 2 or Type 1+2<\/li>\r\n    <li>Pole configuration<\/li>\r\n    <li>Backup protection coordination<\/li>\r\n    <li>Project standard and certification<\/li>\r\n  <\/ul>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"dc-spd-ucpv-for-combiner-box-manufacturers\"><\/span>DC SPD Ucpv for Combiner Box Manufacturers<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>For combiner box manufacturers, Ucpv selection affects more than the SPD itself.<\/p>\r\n  <p>It affects:<\/p>\r\n  <ul>\r\n    <li>BOM approval<\/li>\r\n    <li>Panel label<\/li>\r\n    <li>Wiring diagram<\/li>\r\n    <li>Product datasheet<\/li>\r\n    <li>Customer acceptance<\/li>\r\n    <li>Project documentation<\/li>\r\n    <li>Distributor stock planning<\/li>\r\n    <li>After-sales replacement<\/li>\r\n  <\/ul>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Information<\/th>\r\n          <th>Why It Matters<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Combiner box rated DC voltage<\/td>\r\n          <td>The SPD must match the panel voltage class.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>PV string voltage<\/td>\r\n          <td>Determines the required Ucpv.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Inverter max DC voltage<\/td>\r\n          <td>Prevents mismatch with inverter design.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Number of strings<\/td>\r\n          <td>Affects panel design and protection layout.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>SPD type<\/td>\r\n          <td>Type 2 or Type 1+2 depends on project requirement.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Pole configuration<\/td>\r\n          <td>Common PV SPD options include 2P and 3P designs.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Certification requirement<\/td>\r\n          <td>Important for EPC and OEM approval.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Label requirement<\/td>\r\n          <td>Needed for private label or OEM orders.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>For standard commercial PV combiner boxes, 1000V DC SPD is common.<\/p>\r\n  <p>For utility-scale PV combiner boxes, 1500V DC SPD is common.<\/p>\r\n  <p>For smaller or off-grid systems, 600V DC SPD may be enough.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"dc-spd-ucpv-for-solar-epc-projects\"><\/span>DC SPD Ucpv for Solar EPC Projects<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>For solar EPC projects, Ucpv selection should follow the project design.<\/p>\r\n  <p>The EPC team should confirm:<\/p>\r\n  <ul>\r\n    <li>System voltage class<\/li>\r\n    <li>Lowest site temperature<\/li>\r\n    <li>String configuration<\/li>\r\n    <li>Inverter DC input limit<\/li>\r\n    <li>Lightning exposure<\/li>\r\n    <li>Type 2 or Type 1+2 requirement<\/li>\r\n    <li>Certification and documentation<\/li>\r\n    <li>Installation location of SPD<\/li>\r\n    <li>Backup fuse or breaker requirement<\/li>\r\n  <\/ul>\r\n\r\n  <p>For EPC projects, the main risk is not only choosing the wrong SPD voltage. The bigger risk is that different DC components are selected with different voltage assumptions.<\/p>\r\n  <p>The SPD should match the complete DC system design.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"dc-spd-ucpv-for-pv-distributors\"><\/span>DC SPD Ucpv for PV Distributors<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>For PV distributors, the key question is stock planning.<\/p>\r\n  <p>A distributor may need different Ucpv options for different customer groups:<\/p>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Customer Type<\/th>\r\n          <th>Common Demand<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Small solar installers<\/td>\r\n          <td>600V or 1000V DC SPD<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Commercial PV contractors<\/td>\r\n          <td>1000V DC SPD<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>EPC project buyers<\/td>\r\n          <td>1000V or 1500V DC SPD<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Combiner box manufacturers<\/td>\r\n          <td>1000V and 1500V OEM options<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Utility-scale solar projects<\/td>\r\n          <td>1500V DC SPD<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>For distributor stock, 1000V and 1500V DC SPD models are often the most important options. But local market demand should be checked before placing bulk orders.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"dc-spd-ucpv-for-oem-buyers\"><\/span>DC SPD Ucpv for OEM Buyers<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>For OEM buyers, Ucpv selection must be stable, repeatable, and easy to approve.<\/p>\r\n  <p>An OEM buyer should confirm:<\/p>\r\n  <ul>\r\n    <li>Required Ucpv<\/li>\r\n    <li>Type 2 or Type 1+2<\/li>\r\n    <li>Pole configuration<\/li>\r\n    <li>Module color and window indicator<\/li>\r\n    <li>Remote signal contact requirement<\/li>\r\n    <li>Private label requirement<\/li>\r\n    <li>Packaging requirement<\/li>\r\n    <li>Datasheet format<\/li>\r\n    <li>Certificate and test report requirement<\/li>\r\n    <li>Replacement module availability<\/li>\r\n  <\/ul>\r\n\r\n  <p>For OEM supply, do not change the SPD voltage rating casually after the design is approved. Even if two products look similar, different Ucpv ratings may affect datasheet, label, wiring, and project documentation.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"type-2-or-type-12-does-it-change-ucpv\"><\/span>Type 2 or Type 1+2: Does It Change Ucpv?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>Type 2 and Type 1+2 describe the surge discharge capability and test class.<\/p>\r\n  <p>They do not replace Ucpv selection.<\/p>\r\n  <p>In real orders, both must be confirmed.<\/p>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Possible Requirement<\/th>\r\n          <th>Typical Use<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>Type 2 DC SPD, Ucpv 1000V<\/td>\r\n          <td>Common commercial PV systems and combiner boxes.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Type 2 DC SPD, Ucpv 1500V<\/td>\r\n          <td>High-voltage utility-scale PV projects.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Type 1+2 DC SPD, Ucpv 1000V<\/td>\r\n          <td>1000V PV systems with higher lightning exposure or project requirement.<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Type 1+2 DC SPD, Ucpv 1500V<\/td>\r\n          <td>1500V PV systems where lightning current discharge capability is specified.<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>Type 2 DC SPD is commonly used for protection against induced surges from nearby lightning or switching events.<\/p>\r\n  <p>Type 1+2 DC SPD may be required when the PV system has higher lightning exposure or when the project specification requires lightning current discharge capability.<\/p>\r\n  <p>Always check the project requirement before confirming the model.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"what-information-should-you-send-before-ordering\"><\/span>What Information Should You Send Before Ordering?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>If you are not sure whether to choose 600V, 1000V, or 1500V DC SPD, send the following information to the supplier before ordering.<\/p>\r\n\r\n  <div class=\"ucpv-img-block\">\r\n    <img decoding=\"async\" src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/before-ordering-dc-spd-checklist.webp\" alt=\"Before ordering DC SPD checklist for solar PV combiner box and OEM projects\" loading=\"lazy\" \/>\r\n    <div class=\"ucpv-img-caption\">Before ordering DC SPD checklist for PV combiner box, EPC, distributor, and OEM projects.<\/div>\r\n  <\/div>\r\n\r\n  <div class=\"ucpv-table-wrap\">\r\n    <table class=\"ucpv-table\">\r\n      <thead>\r\n        <tr>\r\n          <th>Information to Send<\/th>\r\n          <th>Example<\/th>\r\n        <\/tr>\r\n      <\/thead>\r\n      <tbody>\r\n        <tr>\r\n          <td>PV system voltage<\/td>\r\n          <td>600V \/ 1000V \/ 1500V<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Module Voc<\/td>\r\n          <td>49V<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Modules in series<\/td>\r\n          <td>18 \/ 20 \/ 24 \/ 28<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Lowest site temperature<\/td>\r\n          <td>-10\u00b0C \/ -20\u00b0C \/ -30\u00b0C<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Inverter max DC voltage<\/td>\r\n          <td>1000V \/ 1500V<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Combiner box rated voltage<\/td>\r\n          <td>1000V DC \/ 1500V DC<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>SPD type<\/td>\r\n          <td>Type 2 \/ Type 1+2<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Pole configuration<\/td>\r\n          <td>2P \/ 3P<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Required discharge rating<\/td>\r\n          <td>In \/ Imax requirement<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>Certification requirement<\/td>\r\n          <td>IEC\/EN, TUV, CB, CE, or project-specific<\/td>\r\n        <\/tr>\r\n        <tr>\r\n          <td>OEM requirement<\/td>\r\n          <td>Label, packaging, datasheet, logo<\/td>\r\n        <\/tr>\r\n      <\/tbody>\r\n    <\/table>\r\n  <\/div>\r\n\r\n  <p>This information helps avoid wrong model selection. It also helps the supplier recommend a DC SPD that matches your project, instead of only quoting the cheapest available product.<\/p>\r\n\r\n  <section class=\"ucpv-cta\">\r\n    <h2><span class=\"ez-toc-section\" id=\"send-your-pv-system-requirement\"><\/span>Send Your PV System Requirement<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>If you are selecting DC SPDs for a PV combiner box, inverter cabinet, solar distribution panel, or OEM project, send us your system voltage and PV string data.<\/p>\r\n    <p>Our team can recommend a suitable DC SPD model for your solar PV application.<\/p>\r\n    <div class=\"ucpv-btn-row\">\r\n      <a class=\"ucpv-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\"><span>Request DC SPD Selection Help<\/span><\/a>\r\n      <a class=\"ucpv-btn-secondary\" href=\"https:\/\/www.cnspd.com\/shop\/dc-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><span>View DC SPD Products<\/span><\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"common-mistakes-to-avoid\"><\/span>Common Mistakes to Avoid<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n  <h3>Mistake 1: Choosing by price only<\/h3>\r\n  <p>A lower-voltage SPD may be cheaper, but it is not suitable for a higher-voltage PV system.<\/p>\r\n\r\n  <h3>Mistake 2: Using AC SPD on the DC side<\/h3>\r\n  <p>AC SPD and PV DC SPD are not the same. The DC side of a solar PV system requires a DC-rated SPD designed for PV applications.<\/p>\r\n\r\n  <h3>Mistake 3: Ignoring cold-weather Voc<\/h3>\r\n  <p>PV voltage can rise in low-temperature conditions. This is one of the most common reasons why Ucpv should not be selected only by nominal system voltage.<\/p>\r\n\r\n  <h3>Mistake 4: Assuming 1500V is always better<\/h3>\r\n  <p>A 1500V SPD is necessary for a 1500V PV system, but it is not automatically the best choice for every 600V or 1000V project.<\/p>\r\n\r\n  <h3>Mistake 5: Not checking the full DC circuit<\/h3>\r\n  <p>The SPD must match the inverter, combiner box, isolator, fuse holder, cable, connector, and project specification.<\/p>\r\n\r\n  <h3>Mistake 6: Changing OEM models without approval<\/h3>\r\n  <p>For OEM panels and combiner boxes, changing SPD Ucpv after approval may affect label, datasheet, wiring diagram, and customer acceptance.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"recommended-selection-flow\"><\/span>Recommended Selection Flow<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <ol class=\"ucpv-flow\">\r\n    <li>Confirm whether the project is 600V, 1000V, or 1500V.<\/li>\r\n    <li>Check the PV module Voc.<\/li>\r\n    <li>Confirm the number of modules in series.<\/li>\r\n    <li>Apply low-temperature correction.<\/li>\r\n    <li>Compare corrected Voc with inverter maximum DC voltage.<\/li>\r\n    <li>Confirm combiner box rated DC voltage.<\/li>\r\n    <li>Select the proper DC SPD Ucpv.<\/li>\r\n    <li>Confirm Type 2 or Type 1+2 requirement.<\/li>\r\n    <li>Confirm pole configuration and wiring.<\/li>\r\n    <li>Check certification and project documentation.<\/li>\r\n    <li>Send the final data to the supplier for model recommendation.<\/li>\r\n  <\/ol>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"example-1000v-pv-combiner-box\"><\/span>Example: 1000V PV Combiner Box<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A buyer is building a 1000V PV combiner box.<\/p>\r\n  <p>The buyer asks:<\/p>\r\n  <p><strong>\u201cCan we use a 1000V DC SPD?\u201d<\/strong><\/p>\r\n  <p>A professional answer should not stop at yes.<\/p>\r\n  <p>The supplier should confirm:<\/p>\r\n  <ul>\r\n    <li>What is the module Voc?<\/li>\r\n    <li>How many modules are connected in series?<\/li>\r\n    <li>What is the lowest expected temperature?<\/li>\r\n    <li>What is the corrected string Voc?<\/li>\r\n    <li>Is the inverter rated for 1000V DC?<\/li>\r\n    <li>Is the combiner box rated for 1000V DC?<\/li>\r\n    <li>Does the project require Type 2 or Type 1+2?<\/li>\r\n    <li>Is certification documentation required?<\/li>\r\n  <\/ul>\r\n\r\n  <p>If the corrected string Voc is safely within the 1000V system design, a 1000V DC SPD is usually the right selection.<\/p>\r\n  <p>If the corrected string Voc is too close to the limit, the PV string design should be reviewed before confirming the SPD.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"example-1500v-utility-scale-pv-project\"><\/span>Example: 1500V Utility-Scale PV Project<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>A utility-scale solar project uses a 1500V DC architecture.<\/p>\r\n  <p>In this case, the buyer should confirm:<\/p>\r\n  <ul>\r\n    <li>1500V inverter input rating<\/li>\r\n    <li>1500V combiner box design<\/li>\r\n    <li>1500V DC isolator rating<\/li>\r\n    <li>1500V DC fuse and holder rating<\/li>\r\n    <li>1500V cable and connector rating<\/li>\r\n    <li>1500V DC SPD Ucpv<\/li>\r\n    <li>Type 2 or Type 1+2 requirement<\/li>\r\n    <li>Project certification documents<\/li>\r\n  <\/ul>\r\n\r\n  <p>For this type of project, a 1500V DC SPD is not just a higher-voltage option. It is part of the full 1500V PV system design.<\/p>\r\n\r\n  <h2><span class=\"ez-toc-section\" id=\"how-leeyee-supports-dc-spd-ucpv-selection\"><\/span>How LEEYEE Supports DC SPD Ucpv Selection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n  <p>LEEYEE supplies DC surge protective devices for solar PV applications, including PV combiner boxes, inverter DC protection, solar distribution panels, and OEM panel projects.<\/p>\r\n  <p>For PV SPD selection, we normally confirm more than the voltage label.<\/p>\r\n  <p>We check:<\/p>\r\n  <ul>\r\n    <li>System voltage<\/li>\r\n    <li>Corrected PV string voltage<\/li>\r\n    <li>SPD type<\/li>\r\n    <li>Pole configuration<\/li>\r\n    <li>Discharge current requirement<\/li>\r\n    <li>Certification requirement<\/li>\r\n    <li>OEM label or private label requirement<\/li>\r\n    <li>Target application, such as combiner box or inverter cabinet<\/li>\r\n  <\/ul>\r\n\r\n  <div class=\"ucpv-note\">\r\n    <h3>Documentation support for EPC and OEM orders<\/h3>\r\n    <p>For PV SPD projects, buyers often need IEC\/EN, TUV, CB, CE, or project-specific documents before confirming EPC, distributor, or OEM orders. Please confirm the required documentation before model approval.<\/p>\r\n  <\/div>\r\n\r\n  <p>CNSPD is LEEYEE\u2019s surge protection-focused platform, built to help global buyers source reliable SPDs and related low-voltage protection products.<\/p>\r\n  <p>If you need DC SPD selection support for a 600V, 1000V, or 1500V solar PV system, send your PV system data before ordering.<\/p>\r\n\r\n  <section class=\"ucpv-faq\">\r\n    <h2><span class=\"ez-toc-section\" id=\"faq\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>What Ucpv should I choose for a 1000V solar PV system?<\/h3>\r\n      <p>For most 1000V solar PV systems, a 1000V DC SPD is commonly selected. However, you should confirm the corrected PV string open-circuit voltage, inverter maximum DC voltage, and combiner box rating before placing the order.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>Can I use a 1500V DC SPD instead of a 1000V DC SPD?<\/h3>\r\n      <p>Do not replace a 1000V DC SPD with a 1500V DC SPD blindly. A 1500V SPD has a higher voltage rating, but the rest of the PV system may still be designed for 1000V DC.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>Is Ucpv the same as inverter maximum DC voltage?<\/h3>\r\n      <p>No. Ucpv is the maximum continuous operating voltage of the SPD. Inverter maximum DC voltage is the highest DC input voltage allowed by the inverter. They should be coordinated, but they are not the same parameter.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>Should DC SPD Ucpv be equal to or higher than PV string Voc?<\/h3>\r\n      <p>Yes. The DC SPD Ucpv should be equal to or higher than the maximum voltage that can appear at the SPD terminals. For PV systems, corrected open-circuit voltage is an important reference.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>What happens if DC SPD Ucpv is too low?<\/h3>\r\n      <p>If Ucpv is too low, the SPD may be stressed during normal PV operation. This can lead to faster aging, abnormal heating, red indicator status, thermal disconnection, or early failure.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>What happens if DC SPD Ucpv is too high?<\/h3>\r\n      <p>If Ucpv is much higher than needed, the SPD may not provide the best protection coordination. The voltage protection level may be higher, and the product may cost more than necessary.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>Is 1500V DC SPD better than 1000V DC SPD?<\/h3>\r\n      <p>Not always. A 1500V DC SPD is the right choice for a 1500V PV system. For a 1000V PV system, a 1000V DC SPD is usually the normal selection if the corrected string voltage is within the system limit.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>What Ucpv is common for PV combiner boxes?<\/h3>\r\n      <p>1000V DC SPD is common for many commercial PV combiner boxes. 1500V DC SPD is common for utility-scale PV combiner boxes. 600V DC SPD may be used for smaller or lower-voltage PV systems.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>Do I need Type 2 or Type 1+2 DC SPD?<\/h3>\r\n      <p>It depends on the project design, lightning exposure, and specification. Type 2 is common for many PV systems. Type 1+2 may be required when lightning current discharge capability is specified.<\/p>\r\n    <\/div>\r\n\r\n    <div class=\"ucpv-faq-item\">\r\n      <h3>What information should I send for DC SPD model selection?<\/h3>\r\n      <p>Send the PV system voltage, module Voc, modules in series, lowest site temperature, inverter maximum DC voltage, combiner box rated voltage, SPD type, pole configuration, and certification requirement.<\/p>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ucpv-cta\">\r\n    <h2><span class=\"ez-toc-section\" id=\"need-help-choosing-dc-spd-ucpv\"><\/span>Need Help Choosing DC SPD Ucpv?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>If you are selecting DC SPDs for a PV combiner box, inverter cabinet, solar distribution panel, or OEM project, send us your system voltage and PV string data.<\/p>\r\n    <p>Please include PV system voltage, module Voc, number of modules in series, lowest installation temperature, inverter maximum DC voltage, combiner box rated voltage, Type 2 or Type 1+2 requirement, pole configuration, and certification or OEM label requirement.<\/p>\r\n    <div class=\"ucpv-btn-row\">\r\n      <a class=\"ucpv-btn leeyee-site-popup-btn\" href=\"javascript:void(0);\"><span>Request DC SPD Selection Help<\/span><\/a>\r\n      <a class=\"ucpv-btn-secondary\" href=\"https:\/\/www.cnspd.com\/shop\/dc-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><span>View DC SPD Products<\/span><\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ucpv-related\">\r\n    <h2><span class=\"ez-toc-section\" id=\"related-reading\"><\/span>Related Reading<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <ul>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/shop\/dc-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\">DC Surge Protective Device<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/solar-spd\/\" target=\"_blank\" rel=\"noopener\">Solar SPD<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/pv-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\">PV Surge Protective Device<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/dc-spd-up-to-1500v\/\" target=\"_blank\" rel=\"noopener\">DC SPD up to 1500V<\/a><\/li>\r\n      <li><a href=\"https:\/\/www.cnspd.com\/spd-manufacturer-china\/\" target=\"_blank\" rel=\"noopener\">SPD Manufacturer China<\/a><\/li>\r\n    <\/ul>\r\n  <\/section>\r\n\r\n<\/article>\r\n\r\n<script>\r\n  document.addEventListener('DOMContentLoaded', function () {\r\n    var buttons = document.querySelectorAll('.leeyee-site-popup-btn');\r\n\r\n    buttons.forEach(function (button) {\r\n      button.addEventListener('click', function (event) {\r\n        event.preventDefault();\r\n\r\n        var trigger = document.querySelector('.w-popup.ush_popup_1 .w-popup-trigger, .ush_popup_1 .w-popup-trigger, .w-popup-trigger.ush_popup_1');\r\n\r\n        if (trigger) {\r\n          trigger.click();\r\n        } else {\r\n          window.open('https:\/\/www.cnspd.com\/contact\/', '_blank');\r\n        }\r\n      });\r\n    });\r\n  });\r\n<\/script>\r\n\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"What Ucpv should I choose for a 1000V solar PV system?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"For most 1000V solar PV systems, a 1000V DC SPD is commonly selected. 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For solar PV systems, DC SPD Ucpv should be selected according to the real maximum DC voltage that may appear at the SPD terminals,&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29721","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DC SPD Ucpv Selection Guide for 600V, 1000V and 1500V Solar PV Systems<\/title>\n<meta name=\"description\" content=\"Learn how to choose DC SPD Ucpv for 600V, 1000V and 1500V solar PV systems. Practical guide for PV combiner boxes, solar EPC projects and OEM SPD orders.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DC SPD Ucpv Selection Guide for 600V, 1000V and 1500V Solar PV Systems\" \/>\n<meta property=\"og:description\" content=\"Learn how to choose DC SPD Ucpv for 600V, 1000V and 1500V solar PV systems. Practical guide for PV combiner boxes, solar EPC projects and OEM SPD orders.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/es\/dc-spd-ucpv-selection\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - LEEYEE\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-01T08:21:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-01T08:21:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/600v-1000v-1500v-dc-spd-ucpv-selection-table.webp\" \/>\n<meta name=\"author\" content=\"Devin Ling\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Devin Ling\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"19 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/\"},\"author\":{\"name\":\"Devin Ling\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"headline\":\"DC SPD Ucpv Selection Guide for Solar PV Systems\",\"datePublished\":\"2026-07-01T08:21:14+00:00\",\"dateModified\":\"2026-07-01T08:21:43+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/\"},\"wordCount\":4122,\"image\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cnspd.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/600v-1000v-1500v-dc-spd-ucpv-selection-table.webp\",\"articleSection\":[\"News\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/\",\"url\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/\",\"name\":\"DC SPD Ucpv Selection Guide for 600V, 1000V and 1500V Solar PV Systems\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/dc-spd-ucpv-selection\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cnspd.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/600v-1000v-1500v-dc-spd-ucpv-selection-table.webp\",\"datePublished\":\"2026-07-01T08:21:14+00:00\",\"dateModified\":\"2026-07-01T08:21:43+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.cnspd.com\\\/#\\\/schema\\\/person\\\/f49dbafe62c5b47100ad2d9f88af92d3\"},\"description\":\"Learn how to choose DC SPD Ucpv for 600V, 1000V and 1500V solar PV systems. 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