{"id":2117,"date":"2025-06-21T14:43:49","date_gmt":"2025-06-21T06:43:49","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=2117"},"modified":"2025-06-21T14:43:49","modified_gmt":"2025-06-21T06:43:49","slug":"solar-surge-protection-devices-selection-guide","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/fr\/blog\/solar-surge-protection-devices-selection-guide\/","title":{"rendered":"Un guide complet sur la s\u00e9lection des dispositifs de protection contre les surtensions solaires (SPD solaires)"},"content":{"rendered":"<p data-pm-slice=\"1 3 []\">Surge protection is not just a precaution\u2014it's an essential part of a well-designed solar photovoltaic (PV) system. With the increasing adoption of solar energy worldwide, protecting these valuable systems against electrical transients is more critical than ever. This guide will walk you through everything you need to know about Solar Surge Protection Devices (Solar SPDs): what they are, why they matter, and how to choose the right one for your system.<\/p>\r\n\r\n<h2>1. Que sont les dispositifs de protection contre les surtensions solaires (SPD solaires)\u00a0?<\/h2>\r\nA Solar Surge Protection Device (Solar SPD) is a protective electrical component designed to divert or absorb transient overvoltage events, such as lightning strikes or switching operations, before they can damage sensitive solar equipment. These devices are installed at key locations in a solar PV system, including at the DC combiner box, photovoltaic inverter, and AC distribution panel.\r\n\r\nSolar SPDs are categorized by waveform response, discharge capacity, and installation location. They typically use components like Metal Oxide Varistors (MOVs), Gas Discharge Tubes (GDTs), and Transient Voltage Suppression (TVS) diodes to protect against overvoltage events.\r\n\r\n<a href=\"https:\/\/www.britecelectric.com\/fr\/attachment\/pv-surge-protector-type-2\/\" target=\"_blank\" rel=\"noopener\"><img class=\"alignnone wp-image-2118\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/06\/PV-Surge-Protector-Type-2-1024x1024.webp\" alt=\"Dispositifs de protection contre les surtensions solaires en Chine\" width=\"794\" height=\"794\" \/><\/a>\r\n<h2>2. Pourquoi avez-vous besoin de dispositifs de protection contre les surtensions solaires\u00a0?<\/h2>\r\nSurges pose a significant threat to solar systems. Here's why surge protection is a must:\r\n<h3>Risques de foudre et de surtension de commutation<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Les coups de foudre directs peuvent injecter des impulsions de haute \u00e9nergie (forme d'onde de 10\/350 \u00b5s) directement dans les panneaux photovolta\u00efques, provoquant des dommages catastrophiques.<\/li>\r\n \t<li>La foudre indirecte ou le couplage \u00e9lectromagn\u00e9tique (forme d'onde 8\/20 \u00b5s) propagent les surtensions \u00e0 travers les longs c\u00e2bles, endommageant les onduleurs, les contr\u00f4leurs et les syst\u00e8mes de surveillance.<\/li>\r\n \t<li>Les op\u00e9rations de commutation du r\u00e9seau provoquent des transitoires de tension provenant des batteries de condensateurs ou un d\u00e9lestage de charge, qui se refl\u00e8tent dans la connexion CA.<\/li>\r\n<\/ul>\r\n<h3>Am\u00e9liorer la fiabilit\u00e9 et prolonger la dur\u00e9e de vie des \u00e9quipements<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Les surtensions mettent \u00e0 rude \u00e9preuve les composants internes, m\u00eame si aucune d\u00e9faillance imm\u00e9diate ne se produit.<\/li>\r\n \t<li>Les transitoires r\u00e9p\u00e9t\u00e9s d\u00e9gradent l'isolation et r\u00e9duisent le temps moyen entre pannes (MTBF).<\/li>\r\n \t<li>Utiliser correctement <a href=\"https:\/\/www.britecelectric.com\/fr\/product-category\/dc-surge-protector\/\" target=\"_blank\" rel=\"noopener\"><em><strong>SPD CC<\/strong><\/em><\/a> pour l'\u00e9nergie solaire assure une protection contre les surtensions photovolta\u00efques qui maintient les syst\u00e8mes en ligne et efficaces pendant des ann\u00e9es.<\/li>\r\n<\/ul>\r\n<h3>Am\u00e9liorer la s\u00e9curit\u00e9 \u00e9lectrique<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Les surtensions peuvent provoquer des arcs \u00e9lectriques, des ruptures d\u2019isolation et m\u00eame des incendies.<\/li>\r\n \t<li>Un dispositif de protection contre les surtensions solaires de haute qualit\u00e9 limite les surtensions \u00e0 des niveaux inf\u00e9rieurs \u00e0 la capacit\u00e9 de tenue des appareils connect\u00e9s.<\/li>\r\n<\/ul>\r\n<h3>Conformit\u00e9 aux normes<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Les normes UL 1449, CEI 61643-31 et CEI 62109 d\u00e9finissent les exigences en mati\u00e8re de classification, de test et d'installation des SPD pour les syst\u00e8mes photovolta\u00efques.<\/li>\r\n \t<li>NEC 690.7(C) et NFPA 780 exigent des SPD pour les syst\u00e8mes photovolta\u00efques, en particulier dans les zones ext\u00e9rieures expos\u00e9es.<\/li>\r\n<\/ul>\r\n<h3>Int\u00e9gration LPZ (zones de protection contre la foudre)<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Le concept de zone de protection contre la foudre (LPZ) permet de d\u00e9terminer o\u00f9 et quel type de parafoudre doit \u00eatre install\u00e9.<\/li>\r\n \t<li>Les SPD de type 1 sont destin\u00e9s \u00e0 la protection des limites (LPZ 0 \u00e0 LPZ 1), tandis que les types 2 et 3 couvrent les zones internes.<\/li>\r\n<\/ul>\r\nPour un aper\u00e7u plus large de la mani\u00e8re dont la protection contre les surtensions prot\u00e8ge les syst\u00e8mes photovolta\u00efques contre la foudre et les perturbations du r\u00e9seau, consultez notre guide de base\u00a0:<br data-start=\"726\" data-end=\"729\" \/>\ud83d\udc49 <strong data-start=\"734\" data-end=\"873\"><a class=\"\" href=\"https:\/\/www.britecelectric.com\/fr\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_new\" rel=\"noopener\" data-start=\"736\" data-end=\"871\">Protection contre les surtensions pour les syst\u00e8mes solaires photovolta\u00efques<\/a><\/strong>.\r\n<h2>3. Comment choisir le bon SPD solaire<\/h2>\r\nThis section is the heart of your decision-making process. Let's break down the most important criteria that engineers and procurement specialists should consider.\r\n<h3>3.1 Comment faire correspondre les SPD avec votre syst\u00e8me PV<\/h3>\r\n<h4>3.1.1 Niveau de tension (Ucpv)<\/h4>\r\nVotre dispositif de protection contre les surtensions solaires doit \u00eatre con\u00e7u pour la tension maximale du syst\u00e8me. Toujours:\r\n<ul data-spread=\"false\">\r\n \t<li>Faites correspondre le MCOV (tension de fonctionnement maximale continue) \u00e0 au moins 10% au-dessus du Voc (tension de circuit ouvert) du syst\u00e8me.<\/li>\r\n \t<li>Par exemple, dans un syst\u00e8me photovolta\u00efque de 1 000 V, choisissez des SPD \u00e9valu\u00e9s \u00e0 1 100 V ou plus pour garantir une marge appropri\u00e9e et une stabilit\u00e9 \u00e0 long terme.<\/li>\r\n \t<li>Utilisez un SPD DC pour l'\u00e9nergie solaire du c\u00f4t\u00e9 DC et des SPD AC pour les connexions au r\u00e9seau.<\/li>\r\n<\/ul>\r\n<h4>3.1.2 Structure du syst\u00e8me<\/h4>\r\nDiff\u00e9rentes architectures syst\u00e8me n\u00e9cessitent diff\u00e9rentes configurations SPD\u00a0:\r\n<ul data-spread=\"false\">\r\n \t<li>Onduleurs de cha\u00eene\u00a0: SPD pr\u00e8s de l'onduleur, entr\u00e9e CC et sortie CA.<\/li>\r\n \t<li>Onduleurs centraux\u00a0: utilisez un SPD de type 1 \u00e0 proximit\u00e9 du sectionneur principal.<\/li>\r\n \t<li>MPPT multiples\u00a0: chaque tracker peut n\u00e9cessiter un <a href=\"https:\/\/www.britecelectric.com\/fr\/product_category\/pv-surge-protection-type-2\/\" target=\"_blank\" rel=\"noopener\"><em><strong>Parafoudre de type 2<\/strong><\/em><\/a>.<\/li>\r\n \t<li>Floating or Unearthed PV Systems: Y-configuration SPDs or symmetrical protection from both + and - to ground.<\/li>\r\n<\/ul>\r\n<h3 data-pm-slice=\"1 1 []\">3.2 Param\u00e8tres cl\u00e9s de performance du SPD \u00e0 \u00e9valuer<\/h3>\r\n<table style=\"width: 65.8612%;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\"><strong><b>Param\u00e8tre<\/b><\/strong><\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\"><strong><b>Description<\/b><\/strong><\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\"><strong><b>Valeur recommand\u00e9e<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">Imax<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Courant de d\u00e9charge unique maximum (8\/20 \u00b5s)<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">40 \u00e0 80 kA<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">Dans<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Courant de d\u00e9charge nominal<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">\u226510 kA<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">En haut<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Niveau de protection de tension (tension de serrage)<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">20% en dessous du niveau d'isolation de l'\u00e9quipement<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">r\u00e9ponse<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Temps de r\u00e9ponse du SPD<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">&lt;25 ns (pour les SPD bas\u00e9s sur MOV)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<p data-pm-slice=\"1 1 []\">Ensure these parameters are matched to your installation's lightning flash density, fault current level, and system insulation strength.<\/p>\r\n\r\n<h3>3.3 Types de SPD expliqu\u00e9s (Type 1, 2, 3, 1+2)<\/h3>\r\n<table style=\"width: 66.2713%;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\"><strong><b>Taper<\/b><\/strong><\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\"><strong><b>Cas d'utilisation<\/b><\/strong><\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\"><strong><b>Forme d'onde<\/b><\/strong><\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\"><strong><b>Emplacement<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Tapez 1<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Foudre directe (haute \u00e9nergie)<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">10\/350 \u00b5s<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Entre le tableau et la d\u00e9connexion principale<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Tapez 2<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Surtensions indirectes, commutation<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">8\/20 \u00b5s<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Entr\u00e9e onduleur, MPPT, bo\u00eetier de combinaison<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Tapez 3<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Protection finale c\u00f4t\u00e9 charge<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">Transitoire rapide<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Surveillance, ports de communication<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Tapez 1+2<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Combin\u00e9 pour toute la gamme<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">10\/350 + 8\/20\u00b5s<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Syst\u00e8mes critiques (grandes installations photovolta\u00efques)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<p data-start=\"857\" data-end=\"1217\">Vous ne savez pas en quoi les types 1, 2 et 3 diff\u00e8rent en termes de fonctionnalit\u00e9s, de r\u00e9ponse de forme d'onde et de cas d'utilisation\u00a0? Nous avons couvert le <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.britecelectric.com\/fr\/blog\/difference-between-type-1-type-2-and-type-3-surge-protective-devices\/\"><span style=\"font-size: 20px;\"><em><strong data-start=\"964\" data-end=\"1152\">principales diff\u00e9rences entre les parasurtenseurs de type 1, de type 2 et de type 3<\/strong><\/em><\/span><\/a><\/span> dans un blog comparatif d\u00e9taill\u00e9 pour vous aider \u00e0 faire le bon choix.<\/p>\r\n<p data-start=\"1219\" data-end=\"1380\">Utilisez des dispositifs de protection contre les surtensions solaires de type 1 si le syst\u00e8me photovolta\u00efque est connect\u00e9 \u00e0 un syst\u00e8me de protection contre la foudre externe (LPS) avec une distance de s\u00e9paration insuffisante (conform\u00e9ment \u00e0 la norme CEI 62305-3).<\/p>\r\n\r\n<h3>3.4 Comment garantir la s\u00e9curit\u00e9 du SPD et la long\u00e9vit\u00e9 du produit<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Choisissez des SPD avec sectionneurs thermiques int\u00e9gr\u00e9s et indicateurs visuels de panne pour une surveillance de l'\u00e9tat en temps r\u00e9el.<\/li>\r\n \t<li>Assurez-vous que la r\u00e9sistance aux courts-circuits est sup\u00e9rieure \u00e0 l\u2019Icc (courant de court-circuit) du syst\u00e8me.<\/li>\r\n \t<li>If the SPD doesn't include internal overcurrent protection, always install an external fuse or circuit breaker in series.<\/li>\r\n \t<li>N'utilisez jamais de SPD CA du c\u00f4t\u00e9 CC d'un syst\u00e8me solaire photovolta\u00efque\u00a0: cela peut entra\u00eener un arc incontr\u00f4l\u00e9, une d\u00e9faillance de composants ou m\u00eame un incendie en raison de la nature continue du courant continu.<\/li>\r\n<\/ul>\r\nComprendre la distinction entre la protection contre les surtensions CA et CC est essentiel pour \u00e9viter de telles applications inappropri\u00e9es. Explorez les fondamentaux <a href=\"https:\/\/www.britecelectric.com\/fr\/blog\/ac-vs-dc-surge-protection-whats-the-difference\/\"><span style=\"text-decoration: underline;\"><strong><em><span style=\"font-size: 20px;\">diff\u00e9rences entre les SPD AC et DC et apprenez \u00e0 s\u00e9lectionner celui qui convient \u00e0 votre syst\u00e8me<\/span><\/em><\/strong><\/span><\/a>.\r\n<h3>3.5 Conformit\u00e9 et tests<\/h3>\r\nRecherchez ces marques et sp\u00e9cifications\u00a0:\r\n<ul data-spread=\"false\">\r\n \t<li>UL 1449 5e \u00e9dition (Am\u00e9rique du Nord)<\/li>\r\n \t<li><a href=\"https:\/\/cdn.standards.iteh.ai\/samples\/21306\/41f061cefcac43b0927ce5f0b8eb9b2d\/IEC-61643-31-2018.pdf\" target=\"_blank\" rel=\"nofollow noopener\"><strong>CEI 61643-31<\/strong><\/a> (SPD PV DC)<\/li>\r\n \t<li>CEI 61643-11 (SPD CA)<\/li>\r\n \t<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/6471\"><strong>CEI 62109-1\/2<\/strong><\/a> (S\u00e9curit\u00e9 SPD int\u00e9gr\u00e9e \u00e0 l'onduleur)<\/li>\r\n \t<li>Certification tierce\u00a0: T\u00dcV, CE, Intertek, ETL<\/li>\r\n<\/ul>\r\n<h3>3.6 Installation et maintenabilit\u00e9<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Installez des SPD en amont de l'appareil prot\u00e9g\u00e9 (entre le panneau et l'onduleur).<\/li>\r\n \t<li>Suivez la r\u00e8gle des  10 m, installez un SPD aux deux extr\u00e9mit\u00e9s.<\/li>\r\n \t<li>Gardez la longueur du c\u00e2ble courte (&lt;0,5 m id\u00e9alement), minimisez la zone de boucle.<\/li>\r\n \t<li>\u00c9tiquetez clairement tous les SPD et utilisez des indicateurs d\u2019\u00e9tat ou des modules de surveillance.<\/li>\r\n<\/ul>\r\n<h3>3.7 Environnement d'application<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>De plein air? Utilisez des SPD avec les bo\u00eetiers NEMA 4X \/ IP65+.<\/li>\r\n \t<li>Des climats rigoureux ? Recherchez une tol\u00e9rance aux UV et aux temp\u00e9ratures \u00e9lev\u00e9es.<\/li>\r\n \t<li>Consid\u00e9rez les performances du SPD dans la plage de -40\u00b0C \u00e0 +85\u00b0C.<\/li>\r\n<\/ul>\r\n<h3>3.8 Consid\u00e9rations relatives aux co\u00fbts<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>\u00c9quilibrez co\u00fbt et protection\u00a0: ne sous-prot\u00e9gez pas un onduleur $10\u00a0000 pour \u00e9conomiser $30.<\/li>\r\n \t<li>Tenez compte du co\u00fbt du cycle de vie\u00a0: un SPD bon march\u00e9 qui tombe en panne au bout de 2 ans co\u00fbte plus cher en temps d'arr\u00eat.<\/li>\r\n \t<li>Comparez le cycle de remplacement du dispositif de protection contre les surtensions solaires, la p\u00e9riode de garantie et la disponibilit\u00e9.<\/li>\r\n<\/ul>\r\n<h3>3.9 Erreurs de s\u00e9lection courantes \u00e0 \u00e9viter<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Utilisation du type 2 lorsque le type 1 est requis<\/li>\r\n \t<li>S\u00e9lection du SPD AC pour les circuits DC<\/li>\r\n \t<li>Ignorer la densit\u00e9 du flash et la forme d'onde<\/li>\r\n \t<li>Aucune protection du c\u00f4t\u00e9 AC du syst\u00e8me<\/li>\r\n \t<li>Pas de coordination avec LPS (Lightning Protection System)<\/li>\r\n \t<li>Aucun indicateur visuel ni syst\u00e8me de surveillance<\/li>\r\n<\/ul>\r\n<h2 data-pm-slice=\"1 1 []\">4. Conclusion<\/h2>\r\nChoosing the right Solar Surge Protection Device is not just a box-checking task\u2014it's a strategic step to protect your photovoltaic investment, ensure reliable energy output, and comply with safety standards.\r\n\r\nBy understanding Solar Surge Protection Device types, performance metrics, system compatibility, and environmental considerations, technical engineers and purchasing specialists can build robust PV systems that stand up to the test of time, lightning, and everything in between.\r\n\r\nDon\u2019t leave your system vulnerable. Choose the right solar SPD with the right certifications and specs\u2014and you\u2019ll gain peace of mind, long-term savings, and uninterrupted power.","protected":false},"featured_media":2118,"parent":0,"menu_order":129,"template":"","meta":{"_acf_changed":false},"blog_category":[9],"class_list":["post-2117","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-industry-news"],"acf":{"des":"Learn how to choose the right Solar Surge Protection Devices (SPDs) for your PV system. This guide covers SPD types, key selection criteria, AC vs. DC protection differences, and best practices to ensure long-term safety and performance.","txt":"<p data-pm-slice=\"1 3 []\">Surge protection is not just a precaution\u2014it's an essential part of a well-designed solar photovoltaic (PV) system. With the increasing adoption of solar energy worldwide, protecting these valuable systems against electrical transients is more critical than ever. This guide will walk you through everything you need to know about Solar Surge Protection Devices (Solar SPDs): what they are, why they matter, and how to choose the right one for your system.<\/p>\r\n\r\n<h2>1. What Are Solar Surge Protection Devices (Solar SPDs)?<\/h2>\r\nA Solar Surge Protection Device (Solar SPD) is a protective electrical component designed to divert or absorb transient overvoltage events, such as lightning strikes or switching operations, before they can damage sensitive solar equipment. These devices are installed at key locations in a solar PV system, including at the DC combiner box, photovoltaic inverter, and AC distribution panel.\r\n\r\nSolar SPDs are categorized by waveform response, discharge capacity, and installation location. They typically use components like Metal Oxide Varistors (MOVs), Gas Discharge Tubes (GDTs), and Transient Voltage Suppression (TVS) diodes to protect against overvoltage events.\r\n\r\n<a href=\"https:\/\/www.britecelectric.com\/attachment\/pv-surge-protector-type-2\/\" target=\"_blank\" rel=\"noopener\"><img class=\"alignnone wp-image-2118\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/06\/PV-Surge-Protector-Type-2-1024x1024.webp\" alt=\"China Solar Surge Protection Devices\" width=\"794\" height=\"794\" \/><\/a>\r\n<h2>2. Why Do You Need Solar Surge Protection Devices?<\/h2>\r\nSurges pose a significant threat to solar systems. Here's why surge protection is a must:\r\n<h3>Lightning and Switching Overvoltage Risks<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Direct lightning strikes can inject high-energy impulses (10\/350 \u00b5s waveform) directly into PV arrays, causing catastrophic damage.<\/li>\r\n \t<li>Indirect lightning or electromagnetic coupling (8\/20 \u00b5s waveform) spreads voltage surges through long cables, damaging inverters, controllers, and monitoring systems.<\/li>\r\n \t<li>Grid switching operations cause voltage transients from capacitor banks or load shedding, which reflect through the AC connection.<\/li>\r\n<\/ul>\r\n<h3>Improve Reliability and Extend Equipment Lifespan<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Surges stress internal components, even if no immediate failure occurs.<\/li>\r\n \t<li>Repeated transients degrade insulation and reduce the Mean Time Between Failures (MTBF).<\/li>\r\n \t<li>Using proper <a href=\"https:\/\/www.britecelectric.com\/product-category\/dc-surge-protector\/\" target=\"_blank\" rel=\"noopener\"><em><strong>DC SPD<\/strong><\/em><\/a> for solar ensures photovoltaic surge protection that keeps systems online and efficient for years.<\/li>\r\n<\/ul>\r\n<h3>Enhance Electrical Safety<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Overvoltages can cause arc faults, insulation breakdown, and even fires.<\/li>\r\n \t<li>A high-quality Solar Surge Protection Device limits overvoltage to levels below the withstand capability of connected devices.<\/li>\r\n<\/ul>\r\n<h3>Standards Compliance<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>UL 1449, IEC 61643-31, and IEC 62109 define SPD classification, testing, and installation requirements for PV systems.<\/li>\r\n \t<li>NEC 690.7(C) and NFPA 780 require SPDs for PV systems, especially in exposed outdoor areas.<\/li>\r\n<\/ul>\r\n<h3>LPZ (Lightning Protection Zones) Integration<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>The Lightning Protection Zone (LPZ) concept helps determine where and what type of SPD should be installed.<\/li>\r\n \t<li>Type 1 SPDs are for boundary protection (LPZ 0 to LPZ 1), while Type 2 and Type 3 cover internal zones.<\/li>\r\n<\/ul>\r\nFor a broader look at how surge protection safeguards photovoltaic systems from lightning and grid disturbances, check out our foundational guide:<br data-start=\"726\" data-end=\"729\" \/>\ud83d\udc49 <strong data-start=\"734\" data-end=\"873\"><a class=\"\" href=\"https:\/\/www.britecelectric.com\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_new\" rel=\"noopener\" data-start=\"736\" data-end=\"871\">Surge Protection for Solar Photovoltaic Systems<\/a><\/strong>.\r\n<h2>3. How to Choose the Right Solar SPD<\/h2>\r\nThis section is the heart of your decision-making process. Let's break down the most important criteria that engineers and procurement specialists should consider.\r\n<h3>3.1 How to Match SPDs with Your PV System<\/h3>\r\n<h4>3.1.1 Voltage Level (Ucpv)<\/h4>\r\nYour Solar Surge Protection Device must be rated for the maximum system voltage. Always:\r\n<ul data-spread=\"false\">\r\n \t<li>Match the MCOV (Maximum Continuous Operating Voltage) to be at least 10% above the system Voc (Open Circuit Voltage).<\/li>\r\n \t<li>For example, in a 1000V PV system, choose SPDs rated at 1100V or higher to ensure proper headroom and long-term stability.<\/li>\r\n \t<li>Use DC SPD for solar on the DC side and AC SPDs for grid connections.<\/li>\r\n<\/ul>\r\n<h4>3.1.2 System Structure<\/h4>\r\nDifferent system architectures require different SPD configurations:\r\n<ul data-spread=\"false\">\r\n \t<li>String Inverters: SPD near inverter, DC input, and AC output.<\/li>\r\n \t<li>Central Inverters: Use Type 1 SPD near main disconnect.<\/li>\r\n \t<li>Multiple MPPT: Each tracker may require a dedicated <a href=\"https:\/\/www.britecelectric.com\/product_category\/pv-surge-protection-type-2\/\" target=\"_blank\" rel=\"noopener\"><em><strong>Type 2 SPD<\/strong><\/em><\/a>.<\/li>\r\n \t<li>Floating or Unearthed PV Systems: Y-configuration SPDs or symmetrical protection from both + and - to ground.<\/li>\r\n<\/ul>\r\n<h3 data-pm-slice=\"1 1 []\">3.2 Key SPD Performance Parameters to Evaluate<\/h3>\r\n<table style=\"width: 65.8612%;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\"><strong><b>Parameter<\/b><\/strong><\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\"><strong><b>Description<\/b><\/strong><\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\"><strong><b>Recommended Value<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">Imax<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Maximum single discharge current (8\/20 \u00b5s)<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">40\u201380 kA<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">In<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Nominal discharge current<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">\u226510 kA<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">Up<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Voltage protection level (clamping voltage)<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">20% below the equipment insulation level<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 29.3919%; text-align: center;\" width=\"189\">tresponse<\/td>\r\n<td style=\"width: 36.8153%; text-align: center;\" width=\"189\">Response time of the SPD<\/td>\r\n<td style=\"width: 59.7317%; text-align: center;\" width=\"189\">&lt;25 ns (for MOV-based SPDs)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<p data-pm-slice=\"1 1 []\">Ensure these parameters are matched to your installation's lightning flash density, fault current level, and system insulation strength.<\/p>\r\n\r\n<h3>3.3 SPD Types Explained (Type 1, 2, 3, 1+2)<\/h3>\r\n<table style=\"width: 66.2713%;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\"><strong><b>Type<\/b><\/strong><\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\"><strong><b>Use Case<\/b><\/strong><\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\"><strong><b>Waveform<\/b><\/strong><\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\"><strong><b>Location<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Type 1<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Direct lightning (high energy)<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">10\/350 \u00b5s<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Between the array &amp; main disconnect<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Type 2<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Indirect surges, switching<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">8\/20 \u00b5s<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Inverter input, MPPT, combiner box<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Type 3<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Final protection at the load end<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">Fast transient<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Monitoring, comm ports<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 17.211%; text-align: center;\" width=\"142\">Type 1+2<\/td>\r\n<td style=\"width: 30.605%; text-align: center;\" width=\"142\">Combined for the full range<\/td>\r\n<td style=\"width: 20.8522%; text-align: center;\" width=\"142\">10\/350 + 8\/20 \u00b5s<\/td>\r\n<td style=\"width: 60.8315%; text-align: center;\" width=\"142\">Critical systems (large PV plants)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<p data-start=\"857\" data-end=\"1217\">Not sure how Type 1, 2, and 3 differ in functionality, waveform response, and use cases? We\u2019ve covered the <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.britecelectric.com\/blog\/difference-between-type-1-type-2-and-type-3-surge-protective-devices\/\"><span style=\"font-size: 20px;\"><em><strong data-start=\"964\" data-end=\"1152\">key differences between Type 1, Type 2, and Type 3 surge protective devices<\/strong><\/em><\/span><\/a><\/span> in a detailed comparison blog to help you make the right choice.<\/p>\r\n<p data-start=\"1219\" data-end=\"1380\">Use Type 1 Solar Surge Protection Devices if the PV system is connected to an external lightning protection system (LPS) with insufficient separation distance (as per IEC 62305-3).<\/p>\r\n\r\n<h3>3.4 How to Ensure SPD Safety and Product Longevity<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Choose SPDs with built-in thermal disconnectors and visual failure indicators for real-time status monitoring.<\/li>\r\n \t<li>Ensure the short-circuit withstand rating is greater than the system\u2019s Isc (short-circuit current).<\/li>\r\n \t<li>If the SPD doesn't include internal overcurrent protection, always install an external fuse or circuit breaker in series.<\/li>\r\n \t<li>Never use an AC SPD on the DC side of a solar PV system\u2014it can lead to uncontrolled arcing, component failure, or even fire due to the continuous nature of direct current.<\/li>\r\n<\/ul>\r\nUnderstanding the distinction between AC and DC surge protection is essential to avoid such misapplications. Explore the fundamental <a href=\"https:\/\/www.britecelectric.com\/blog\/ac-vs-dc-surge-protection-whats-the-difference\/\"><span style=\"text-decoration: underline;\"><strong><em><span style=\"font-size: 20px;\">differences between AC and DC SPDs and learn how to select the right one for your system<\/span><\/em><\/strong><\/span><\/a>.\r\n<h3>3.5 Compliance &amp; Testing<\/h3>\r\nLook for these marks and specs:\r\n<ul data-spread=\"false\">\r\n \t<li>UL 1449 5th Edition (North America)<\/li>\r\n \t<li><a href=\"https:\/\/cdn.standards.iteh.ai\/samples\/21306\/41f061cefcac43b0927ce5f0b8eb9b2d\/IEC-61643-31-2018.pdf\" target=\"_blank\" rel=\"nofollow noopener\"><strong>IEC 61643-31<\/strong><\/a> (PV DC SPDs)<\/li>\r\n \t<li>IEC 61643-11 (AC SPDs)<\/li>\r\n \t<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/6471\"><strong>IEC 62109-1\/2<\/strong><\/a> (Inverter-integrated SPD safety)<\/li>\r\n \t<li>Third-party certification: T\u00dcV, CE, Intertek, ETL<\/li>\r\n<\/ul>\r\n<h3>3.6 Installation &amp; Maintainability<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Install SPDs upstream of the protected device (between the panel and the inverter).<\/li>\r\n \t<li>Follow the &lt; 10-meter rule: if the cable is&gt;10m, install SPD at both ends.<\/li>\r\n \t<li>Keep cable length short (&lt;0.5 m ideally), minimize loop area.<\/li>\r\n \t<li>Label all SPDs clearly, and use status indicators or monitoring modules.<\/li>\r\n<\/ul>\r\n<h3>3.7 Application Environment<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Outdoor? Use SPDs with NEMA 4X \/ IP65+ enclosures.<\/li>\r\n \t<li>Harsh climates? Look for UV-resistant, high-temperature tolerance.<\/li>\r\n \t<li>Consider SPD performance at \u221240\u00b0C to +85\u00b0C range.<\/li>\r\n<\/ul>\r\n<h3>3.8 Cost Considerations<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Balance cost vs. protection \u2014 don\u2019t under-protect a $10,000 inverter to save $30.<\/li>\r\n \t<li>Consider lifecycle cost: a cheap SPD that fails in 2 years costs more in downtime.<\/li>\r\n \t<li>Compare Solar Surge Protection Device replacement cycle, warranty period, and availability.<\/li>\r\n<\/ul>\r\n<h3>3.9 Common Selection Mistakes to Avoid<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Using Type 2 where Type 1 is required<\/li>\r\n \t<li>Selecting AC SPD for DC circuits<\/li>\r\n \t<li>Ignoring flash density and waveform<\/li>\r\n \t<li>No protection on the AC side of the system<\/li>\r\n \t<li>No coordination with LPS (Lightning Protection System)<\/li>\r\n \t<li>No visual indicator or monitoring system<\/li>\r\n<\/ul>\r\n<h2 data-pm-slice=\"1 1 []\">4. Conclusion<\/h2>\r\nChoosing the right Solar Surge Protection Device is not just a box-checking task\u2014it's a strategic step to protect your photovoltaic investment, ensure reliable energy output, and comply with safety standards.\r\n\r\nBy understanding Solar Surge Protection Device types, performance metrics, system compatibility, and environmental considerations, technical engineers and purchasing specialists can build robust PV systems that stand up to the test of time, lightning, and everything in between.\r\n\r\nDon\u2019t leave your system vulnerable. Choose the right solar SPD with the right certifications and specs\u2014and you\u2019ll gain peace of mind, long-term savings, and uninterrupted power."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/fr\/wp-json\/wp\/v2\/blog\/2117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/fr\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/fr\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/fr\/wp-json\/wp\/v2\/media\/2118"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/fr\/wp-json\/wp\/v2\/media?parent=2117"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/fr\/wp-json\/wp\/v2\/blog_category?post=2117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}