{"id":147485,"date":"2024-12-11T13:27:05","date_gmt":"2024-12-11T13:27:05","guid":{"rendered":"https:\/\/www.pv-tech.org\/?p=147485"},"modified":"2024-12-18T09:01:47","modified_gmt":"2024-12-18T09:01:47","slug":"nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages","status":"publish","type":"post","link":"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/","title":{"rendered":"NREL says thinner, taller solar modules contributing to increased rate of breakages"},"content":{"rendered":"\n
\"Hail
The NREL report points out that 2mm glass tends to have a lower surface compression than 3.2mm glass, but that this is not the only reason contributing to higher breakage rates in thinner modules. Image: PVEL.<\/figcaption><\/figure>\n\n\n\n

The growing trend of building larger and thinner PV modules has contributed to an increased number of breaks in module glass at utility-scale solar projects, although there is no single contributing factor more influential than the others.<\/p>\n\n\n\n

These are the conclusions drawn by the National Renewable Energy Laboratory (NREL), which published its findings in a paper assessing the impacts of module design on glass vulnerability titled \u2018Tough Break: Many Factors Make Glass Breakage More Likely\u2019.<\/p>\n\n\n\n

The report identifies \u201cspontaneous breakage\u201d – cracks that emerge across panels with no clear point of origin such as a hailstone – occurring more often in thinner and larger modules, particularly those using sheets of glass thinner than 3.2mm, or \u201cusually\u201d as thin as just 2mm.<\/p>\n\n\n\n

A range of damaging factors<\/h2>\n\n\n\n

The report notes that heat treatment in the glass sheet manufacturing process can \u201ckeep small flaws from growing\u201d by increasing the compression of the sheet. It points out that 2mm glass tends to have a lower surface compression than 3.2mm glass, but the idea that 2mm glass cannot be tempered, which would increase its compression, is a \u201ccommon misconception\u201d. The report said with the proper equipment, 2mm glass can be heat-treated to produce fully-tempered glass or even more resilient safety glass. But this is not the only factor contributing to breakages.  <\/p>\n\n\n\n

The growing size of modules could be a more influential factor on breakages; when loaded with wind or snow, a bigger module has to support a greater mass. This can be intensified by the nature of the module mounting. For glass supported on its edges, these edges bear a greater load in bigger modules; for glass supported at four mounting points, these mounting points have to carry a greater load. This imbalance in the shape of module supports has led NREL to dub some of these panels \u201cbig floppy modules\u201d.<\/p>\n\n\n\n

However, the report again suggests that this alone is unlikely to have contributed to a significant increase in module faults, arguing that \u201csize alone is not enough to explain recent breakage problems\u201d. Similarly, the report notes that the wind and thermal expansion endured by the glass components of module can cause them to come into contact with metal mounting frames, damaging them further and contributing to cracks, but that this is also \u201cnot enough to explain recent breakage problems by itself\u201d.<\/p>\n\n\n\n

Collecting data and changing purchasing trends<\/h2>\n\n\n\n

In response to this range of contributing factors, the NREL authors say they are completing tests to detect modules vulnerable to breakage at low loads, and collecting damaged modules to better inform future conclusions. The report calls on suppliers to better communicate which specific weaknesses a product can suffer from, and tasks module buyers with acquiring modules with fewer of these risk factors.<\/p>\n\n\n\n

This year has seen considerable research into module resilience, with a record number of \u201ctop performers\u201d recognised by Kiwa PV Evolution Labs\u2019 annual module reliability scorecard<\/a>. <\/p>\n\n\n\n

In the US, striking hail damage at the Fighting Jays project in Texas raised questions about the ability of PV systems to resist extreme weather events<\/a>, which led to the Department of Energy and kWh Analytics launching a US$2.4 million initiative to enhance the resilience of PV projects<\/a>.<\/p>\n\n\n\n

PV Tech Premium<\/a> <\/em>examined the current module quality and reliability landscape in a long-read earlier this year.<\/p>\n\n\n\n

The full NREL report can be read here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Larger and thinner PV modules has contributed to increase breakages, although there is no single contributing factor, according to NREL.<\/p>\n","protected":false},"author":165,"featured_media":132131,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[155,11605,4138,1163,2181,1224,2187,2268],"paywall-tags":[],"regions":[29],"industry-segments":[8,14],"class_list":["post-147485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-glass","tag-hail","tag-national-renewable-energy-laboratory","tag-nrel","tag-operations-and-maintenance","tag-reports","tag-testing","tag-weather","regions-americas","industry-segments-manufacturing","industry-segments-modules"],"acf":[],"yoast_head":"\nNREL finds thinner and taller modules contribute to breakages - PV Tech<\/title>\n<meta name=\"description\" content=\"Larger and thinner PV modules has contributed to increase breakages, although there is no single contributing factor, according to NREL.\" \/>\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.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NREL says thinner, taller solar modules contributing to increased rate of breakages\" \/>\n<meta property=\"og:description\" content=\"Larger and thinner PV modules has contributed to increase breakages, although there is no single contributing factor, according to NREL.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/\" \/>\n<meta property=\"og:site_name\" content=\"PV Tech\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pages\/PV-Tech\/360525490632679\" \/>\n<meta property=\"article:published_time\" content=\"2024-12-11T13:27:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-12-18T09:01:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.pv-tech.org\/wp-content\/uploads\/2024\/03\/pvel.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"JP Casey\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@pv_tech\" \/>\n<meta name=\"twitter:site\" content=\"@pv_tech\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"JP Casey\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/\"},\"author\":{\"name\":\"JP Casey\",\"@id\":\"https:\/\/www.pv-tech.org\/#\/schema\/person\/921af8a93b03c77dd6a11a662f3453ee\"},\"headline\":\"NREL says thinner, taller solar modules contributing to increased rate of breakages\",\"datePublished\":\"2024-12-11T13:27:05+00:00\",\"dateModified\":\"2024-12-18T09:01:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/\"},\"wordCount\":605,\"publisher\":{\"@id\":\"https:\/\/www.pv-tech.org\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.pv-tech.org\/wp-content\/uploads\/2024\/03\/pvel.jpg\",\"keywords\":[\"glass\",\"hail\",\"national renewable energy laboratory\",\"nrel\",\"operations and maintenance\",\"reports\",\"testing\",\"weather\"],\"articleSection\":[\"News\"],\"inLanguage\":\"en-US\",\"copyrightYear\":\"2024\",\"copyrightHolder\":{\"@id\":\"https:\/\/www.pv-tech.org\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/\",\"url\":\"https:\/\/www.pv-tech.org\/nrel-finds-thinner-taller-modules-contributing-increased-rate-breakages\/\",\"name\":\"NREL finds thinner and taller modules contribute to breakages - 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