{"id":108211,"date":"2025-01-15T08:00:49","date_gmt":"2025-01-15T13:00:49","guid":{"rendered":"https:\/\/\/?p=108211"},"modified":"2025-01-15T13:07:12","modified_gmt":"2025-01-15T18:07:12","slug":"panel-manufacturers-offer-hail-resistant-models-for-small-yet-significant-us-region","status":"publish","type":"post","link":"https:\/\/\/2025\/01\/panel-manufacturers-offer-hail-resistant-models-for-small-yet-significant-us-region\/","title":{"rendered":"Panel manufacturers offer hail-resistant models for small yet significant US region"},"content":{"rendered":"
In the constant race to do more with less, solar panels in the utility-scale space have been getting more powerful but also larger, heavier and bulkier. To cut costs and weight of the two largest components on a bifacial module, manufacturers reduced each piece of glass to a 2-mm thickness. But soon, a new problem arose on bifacial projects sited in the middle of the United States: these panels with thinner glass were sustaining more damage than panels with backsheets during the region\u2019s common hailstorms. Maybe cheaper, lighter glass wasn\u2019t the right choice.<\/p>\n
Solar panel manufacturers found that the easiest and, honestly, most obvious thing to do was go back to the traditional 3.2-mm glass thickness. JinkoSolar recognized the hail problem in 2021 and released the thicker-glass bifacial module EAGLE G5b<\/a> to the North American market.<\/p>\n Jinko module illustration<\/p><\/div>\n \u201cThere was a mass migration to dual-glass products, mostly for cost reduction, and the glass was getting thinner and thinner. We were anxious about hail exposure and the thinning out of the glass,\u201d said Adam Detrick, U.S. director of product management and technical services for JinkoSolar U.S. \u201cWe decided to differentiate and keep our eye on hail, so we went with a 3.2-mm glass, transparent backsheet panel.\u201d<\/p>\n Just using a thicker piece of glass isn\u2019t the full story though. Companies like Jinko, Trina Solar and LONGi use tempered instead of heat-strengthened glass on its hail-resistant brands. Tempered glass is five-times stronger than heat-strengthened glass, said Brenden Frazier, product manager at Trina Solar US.<\/p>\n \u201cThe front glass being a greater thickness allows that tempering process to be done more easily,\u201d he said. \u201cA lot of typical 2-mm glass is heat-strengthened, and there is a good amount of strengthening when you put it through that heat process, but it\u2019s not nearly as strong as a fully tempered glass.\u201d<\/p>\n Trina developed a hail-resistant version of its Vertex N<\/a> bifacial module that will begin shipping Q2 2025. In addition to tempered glass, the module has a transparent backsheet. Backsheet quality<\/a> a decade ago was questionable, another reason why brands moved to dual-glass designs, but things have improved, especially with transparent backsheets.<\/p>\n \u201cA few years ago, we would highlight a backsheet module as being a concern,\u201d Frazier said. \u201cBut we\u2019ve done a lot of work in that realm, a lot of work with our TOPCon reliability and extended backsheet reliability tests. We\u2019re putting this hail-resistant module through full testing and have full confidence in the performance and reliability of the backsheet.\u201d<\/p>\n As the first to really explore hail-resistant designs, Jinko worked with DuPont on a Tedlar-based transparent backsheet that has proven itself over the last three years on Jinko projects. Detrick said that as the 3.2-mm glass, transparent backsheet design is now catching on with other brands promoting hail-resistant modules, Jinko is pushing the envelope again, this time back to dual-glass models.<\/p>\n<\/a>