The US-based manufacturer has completed certification of its latest glue-free, fluorine-free backsheet.
US-based solar materials manufacturer Endurans Solar has announced its new HP D15T transparent backsheet for utility-scale bifacial projects.
“Our unique U.S.-made backsheets provide domestic module manufacturers with improved supply chain stability and give developers the ability to increase their domestic content ratio, enabling a critical strategic advantage for projects targeting Inflation Reduction Act (IRA) tax credits and U.S. government procurement requirements,” said Nate Coleman, CEO of Endurans Solar, in a statement.
The adhesive-free, fluorine-free backing, called HP D15T, has completed IEC 62788-2-1:2023 certification as part of the full D15 series safety standard validation by independent testing laboratory TÜV Rheinland.
Potential customers are currently in the validation phase. “We expect the first customers to have certified their module with D15T and place orders in the first quarter of 2026,” a company spokesperson said. pv magazine.
Suitable for systems up to 1500 V, the total backplate thickness is 350 μm with a water vapor transmission rate (WVTR) at 38 C and 90% relative humidity of less than 1.3 g/m²/d. The moisture and hydrolysis resistance is said to be at a glass protection level. The direct and diffuse transmission ranges at 300-2500 nm are less than 76% and less than 46%, respectively. According to the company, it is also recyclable.
Like Endurans’ previous D15 backplane for monofacial PV modules, the D15T is based on a co-extruded high performance polyolefin (HPO) back cover technology, but the D15T is transparent back cover and made for bifacial PV modules.
It features new optical features that eliminate the common grid pattern or “mesh” often used for bifacial glass/glass or glass/back cover PV modules. Translucent optics and a mesh-free design increase the efficiency of bifacial modules and offer module manufacturers easier lamination, as they no longer have to align the glass or back cover with a grid showing the cell strings, the company said.
The HP D15T is designed as an alternative to standard rear window. It gives manufacturers the option to use thicker front glass without the “weight penalty” that comes with a double-glazed module, the company said.
Endurans Solar is a wholly owned subsidiary of Worthen Industries, with manufacturing facilities in Asia, Europe and the United States.
This content is copyrighted and may not be reused. If you would like to collaborate with us and reuse some of our content, please contact: editors@pv-magazine.com.
