{"id":1280,"date":"2019-01-27T18:21:23","date_gmt":"2019-01-27T18:21:23","guid":{"rendered":"https:\/\/ecotality.com\/?p=1280"},"modified":"2021-03-16T15:00:35","modified_gmt":"2021-03-16T15:00:35","slug":"are-solar-panels-waterproof","status":"publish","type":"post","link":"https:\/\/ecotality.com\/are-solar-panels-waterproof\/","title":{"rendered":"Are Solar Panels Waterproof?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1280\" class=\"elementor elementor-1280\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a259288 lead-section elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a259288\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1753e11\" data-id=\"1753e11\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8879c87 article-title elementor-widget elementor-widget-heading\" data-id=\"8879c87\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Are Solar Panels Waterproof?<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-96b5da1 toc-and-author-bio-section elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"96b5da1\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-b42d0b5 left-column\" data-id=\"b42d0b5\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2fb6821 table-of-contents elementor-widget elementor-widget-shortcode\" data-id=\"2fb6821\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_55 counter-hierarchy ez-toc-counter ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Page Contents<\/p>\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=\"https:\/\/ecotality.com\/are-solar-panels-waterproof\/#Can-My-Solar-Panels-Resist-Rainwater\" title=\"Can My Solar Panels Resist Rainwater?\">Can My Solar Panels Resist Rainwater?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ecotality.com\/are-solar-panels-waterproof\/#Don%E2%80%99t-Forget-Your-Roof\" title=\"Don\u2019t Forget Your Roof!\">Don\u2019t Forget Your Roof!<\/a><\/li><\/ul><\/nav><\/div>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ede662e right-column\" data-id=\"ede662e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-81d4508 author-bio elementor-widget elementor-widget-shortcode\" data-id=\"81d4508\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><script type=\"application\/ld+json\">\n\t\t\t\t\t\t\t{\n\t\t\t\t\t\t\t  \"@context\": \"https:\/\/schema.org\/\",\n\t\t\t\t\t\t\t  \"@type\": \"Person\",\n\t\t\t\t\t\t\t  \"name\": \"Carlos\",\n\t\t\t\t\t\t\t  \"url\": \"https:\/\/ecotality.com\/author\/carlos\/\",\n\t\t\t\t\t\t\t  \"image\": \"https:\/\/secure.gravatar.com\/avatar\/3c18d5a96d3725994be378321295fd4b?s=96&d=mm&r=g\",\n\t\t\t\t\t\t\t  \"jobTitle\": \"Author\"  \n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t<\/script><p><img decoding=\"async\" loading=\"lazy\" class=\"author-bio-avatar\" src=\"https:\/\/secure.gravatar.com\/avatar\/3c18d5a96d3725994be378321295fd4b?s=50&amp;d=mm&amp;r=g\" alt=\"Carlos\" width=\"50\" height=\"50\" \/><\/p><p class=\"author-bio-text\"><span class=\"written-by-text\">Written by<\/span> <span class=\"job-title\">qualified solar engineer<\/span> <span class=\"author-name\">Carlos<\/span><span class=\"written-by-period\">.<\/span> <span class=\"last-updated-text\">Last updated:<\/span> <time datetime=\"2021-03-16 15:00:35\">March 16, 2021<\/time><\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4caed31 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4caed31\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b3770e9\" data-id=\"b3770e9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5ff3f74 elementor-widget elementor-widget-text-editor\" data-id=\"5ff3f74\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>All solar panels are manufactured to be waterproof, and the junction boxes behind them also have an IP rating protection. Therefore, if it rains, storms, or even hails, you do not need to be worried about your panels getting damaged. The key to the waterproof design is related to the composition and <a href=\"https:\/\/ecotality.com\/what-are-solar-panels-made-of\/\" target=\"_blank\" rel=\"noopener\">manufacturing parts of the panel<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Can-My-Solar-Panels-Resist-Rainwater\"><\/span>Can My Solar Panels Resist Rainwater?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Since solar panels need to be placed outdoors to capture sunlight and transform it into electricity, they need to be designed to endure and resist multiple harsh environmental conditions. Solar panel manufacturers must submit their modules to lab tests that will ensure the performance of these devices under severe outdoor conditions. Tests include thermal cycling, humidity freeze tests, damp heat, hail tests, mechanical load tests, leakage current tests and more.<\/p>\n<p>Since raining is a natural phenomenon that occurs everywhere, solar panel manufacturers design their modules to be waterproof and to keep producing electricity after water falls on the module. This applies to every solar panel that has a frame and a glass to protect it and it means that you can leave for instance a <a href=\"https:\/\/ecotality.com\/best-solar-panels-for-camping\/\" target=\"_blank\" rel=\"noopener\">solar panel for camping<\/a> out there in the wild during your next outdoor adventure with no worries about the rainy days. Actually, a common maintenance practice is to set the minimum angle of the solar panels at no less than 15\u00b0 in order for rainwater to do the cleaning of the modules.<\/p>\n<p>However, make no mistake, solar panels are still electronic devices that could get damaged if water enters into the module. The only reason why rainwater does not affect the performance of the solar panel is because the wiring and solar cells are protected by a set of components: glass, sealing glue, an aluminum frame, a backsheet made from polymer-based materials, and an encapsulant made of ethyl vinyl acetate (EVA) which is used to provide adhesion between the solar cells, the top and the rear surface of the PV module.<\/p>\n<p>The figure below can better illustrate the structure and components of the solar panel.<\/p>\n<p style=\"text-align: center;\"><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-9-354x235.webp 354w,https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-9-450x300.webp 450w\" sizes=\"(max-width: 600px) 100vw, 600px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-9.png\" height=\"400\" width=\"600\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-9-354x235.png 354w, https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-9-450x300.png 450w\" sizes=\"(max-width: 600px) 100vw, 600px\" class=\"aligncenter wp-image-1282 size-full sp-no-webp\" alt=\"explanation of all the components that make up a solar panel\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 20px;\">Components of a solar panel (Source \u2013 <a href=\"https:\/\/www.irena.org\/publications\/2016\/Jun\/End-of-life-management-Solar-Photovoltaic-Panels\" target=\"_blank\" rel=\"nofollow noopener\">IRENA Report<\/a>)<\/span><\/p>\n<p>All of these components protect the solar cells and wiring from getting wet, which allows us to practice maintenance procedures using wet sponges or even low-pressure water to clean the modules.<\/p>\n<p>Without these seals, the cells would be exposed to the weather conditions and probably would not work anymore. In the odd and strange case that your solar panel&#8217;s seal is broken and water does enter into the module (resulting in damage), you must not worry because most manufacturers product warranties cover that.<\/p>\n<p>Nevertheless, rainwater can become a problem when is mixed with dirt on the surface of the module. Generally, when rain falls, the glass of the module gets <a href=\"https:\/\/ecotality.com\/cleaning\/\">clean<\/a>, but the corners and borders of the frame could accumulate mud. This is undesirable because it can lead to the presence of moisture and therefore increase the probabilities of leakage currents and a reduction in performance.<\/p>\n<p>Top and new solar panel models take this into account and avoid the presence of corners or borders where mud could get accumulated. Water drainage systems like the HIT modules from Panasonic allow water to flow continuously through the surface of the solar panel, avoiding the accumulation of water in corners or borders.<\/p>\n<p>If you still have doubts about the water resistance of solar panels, we can understand it, after all, they generate electricity and electrical power and water do not mix well. However, believe it or not, there are some solar panels that, unlike the traditional ones, they are constantly covered in water or surrounded by water. There are multiple examples of this such as <a href=\"https:\/\/ecotality.com\/best-solar-birdbath-fountains\/\" target=\"_blank\" rel=\"noopener\">solar bird baths<\/a>, <a href=\"https:\/\/ecotality.com\/best-solar-powered-water-pumps\/\" target=\"_blank\" rel=\"noopener\">solar fountain pumps<\/a> or even <a href=\"https:\/\/ecotality.com\/solar-powered-pool-cleaners\/\" target=\"_blank\" rel=\"noopener\">solar powered pool cleaners<\/a>.<\/p>\n<p style=\"text-align: center;\"><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil.webp 777w,https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil-300x163.webp 300w,https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil-768x416.webp 768w\" sizes=\"(max-width: 777px) 100vw, 777px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil.png\" height=\"421\" width=\"777\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil.png 777w, https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil-300x163.png 300w, https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/perfil-768x416.png 768w\" sizes=\"(max-width: 777px) 100vw, 777px\" class=\"aligncenter wp-image-1283 size-full sp-no-webp\" alt=\"hit solar panel drainage system\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 20px;\">HIT solar panel drainage (Source \u2013 <a href=\"https:\/\/www.youtube.com\/watch?v=N_Og7PsDQPs\" target=\"_blank\" rel=\"nofollow noopener\">RENVU<\/a>)<\/span><\/p>\n<h2>Don&#8217;t Forget Your Roof!<\/h2>\n<p>It seems like solar panels are protected against water, however, there is something else in your PV system that needs protection from rainwater, your roof.<\/p>\n<p>In a rooftop PV array, the mounting system requires to penetrate the surface of the roof and the flashings (aluminum supports of the rails) need to be installed over rafters or trusses that will effectively resist the <a href=\"https:\/\/ecotality.com\/solar-panel-weights\/\" target=\"_blank\" rel=\"noopener\">weight of the solar panels<\/a> and the mounting system.<\/p>\n<p>Once the perforation is done, many solar installers include waterproofing sealants (applied under the flashing, around the bolt hole) in their installations to avoid any possible water leakages. Despite the fact that this is common practice, it has been verified that after 10-15 years these sealants could get broken due to the excess of solar radiation, contraction, and expansion of the material. This is due to changes in temperature, and it&#8217;s even due to oxidation. Therefore, the sealant by itself has short-term reliability.<\/p>\n<p style=\"text-align: center;\"><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-10.webp 510w,https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-10-300x239.webp 300w\" sizes=\"(max-width: 510px) 100vw, 510px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-10.png\" height=\"406\" width=\"510\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-10.png 510w, https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/grafica-10-300x239.png 300w\" sizes=\"(max-width: 510px) 100vw, 510px\" class=\"aligncenter wp-image-1285 size-full sp-no-webp\" alt=\"image of how the change in temperature and weather has broken the seal of the mounting system\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 20px;\">Broken seal of the mounting system (Source \u2013 <a href=\"https:\/\/www.youtube.com\/watch?v=GEg2byPLNto\" target=\"_blank\" rel=\"nofollow noopener\">Elemental Energy<\/a>)<\/span><\/p>\n<p>Once the seal is broken, rainwater can flow through small leaks, leading in time to rotten rafters and sheathing. This will translate into a costly removal and remounting of the PV array, along with the probability of adding a new roof (between $500 and $1000 ). Remounting your PV system could cost you around 50 c\/watt, which if you think about a typical 4kW, could be around $2,000. As you can see, this is something that you do not want to happen.<\/p>\n<p>This is the reason why it is advisable to use code-complying flashing methods like asphaltic roofing cement with reinforcing mesh, or single-ply membranes like PVC, EPDM, and TPO to install the mounting system on the roof.<\/p>\n<p>Quick Mount PV, a roof mounting system manufacturer, focused on solving this problem by installing an aluminum flute to the top of the bolt hole, elevating the waterproofing sealant above the flood line and protecting it with a stainless fused aluminum instead of rubber. For more details, you can check this <a href=\"https:\/\/www.youtube.com\/watch?v=GEg2byPLNto\" target=\"_blank\" rel=\"noopener\">video<\/a>.<\/p>\n<p>Since <a href=\"https:\/\/ecotality.com\/how-long-do-solar-panels-last\/\" target=\"_blank\" rel=\"noopener\">the PV system should work effectively throughout a 25-year period<\/a>, then <a href=\"https:\/\/ecotality.com\/can-solar-panels-damage-my-roof\/\" target=\"_blank\" rel=\"noopener\">your roof should be strong enough<\/a> as to resist that extra weight from solar panels over the entire period. Based on this approach, the best recommendation that a good solar installer should give you is to replace\/upgrade your roof (or at least the section where the PV array would be installed) if it is older than 10 years.<\/p>\n<p>As you can see, there is more to say about waterproofing your roof than the solar panels themselves. Solar panels are designed to be waterproof and it&#8217;s very rare that they fail due to water leakages. However, a bad rooftop installation can lead to important damage in the support of the PV array, putting your investment in danger.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-717538f7 post-rating-section elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"717538f7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6347a516\" data-id=\"6347a516\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3a176955 post-rating elementor-widget elementor-widget-shortcode\" data-id=\"3a176955\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><!-- Rate my Post Plugin --><div  class=\"rmp-widgets-container rmp-wp-plugin rmp-main-container js-rmp-widgets-container js-rmp-widgets-container--1280 \"  data-post-id=\"1280\">    <!-- Rating widget -->  <div class=\"rmp-rating-widget js-rmp-rating-widget\">          <p class=\"rmp-heading rmp-heading--title\">        We hope you liked this article. 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Be the first to rate this post.    <\/p>    <p class=\"rmp-rating-widget__msg js-rmp-msg\"><\/p>  <\/div>  <!--Structured data -->  <script type=\"application\/ld+json\">{  \"@context\": \"http:\/\/schema.org\",  \"@type\": \"Product\",  \"aggregateRating\": {    \"@type\": \"AggregateRating\",    \"bestRating\": \"5\",    \"ratingCount\": \"7\",    \"ratingValue\": \"5\"  },  \"image\": \"https:\/\/ecotality.com\/wp-content\/uploads\/2019\/01\/Solar-panels-in-the-rain-e1548076683321.jpg\",  \"name\": \"Are Solar Panels Waterproof?\",  \"description\": \"Are Solar Panels Waterproof?\"}<\/script>      <\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Are Solar Panels Waterproof? All solar panels are manufactured to be waterproof, and the junction boxes behind them also have an IP rating protection. Therefore, if it rains, storms, or even hails, you do not need to be worried about your panels getting damaged. The key to the waterproof design is related to the composition &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/ecotality.com\/are-solar-panels-waterproof\/\"> <span class=\"screen-reader-text\">Are Solar Panels Waterproof?<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":7,"featured_media":1331,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"right-sidebar","site-content-layout":"plain-container","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","_glsr_average":0,"_glsr_ranking":0,"_glsr_reviews":0},"categories":[27],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Are Solar Panels Waterproof? - ecotality.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ecotality.com\/are-solar-panels-waterproof\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Are Solar Panels Waterproof? - ecotality.com\" \/>\n<meta property=\"og:description\" content=\"Are Solar Panels Waterproof? All solar panels are manufactured to be waterproof, and the junction boxes behind them also have an IP rating protection. Therefore, if it rains, storms, or even hails, you do not need to be worried about your panels getting damaged. The key to the waterproof design is related to the composition &hellip; Are Solar Panels Waterproof? 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