T1 Energy announced it has acquired solar patents and other intellectual property from Evervolt Green Energy Holding for $135 million. The patents relate to TOPCon solar cells and modules, a technology area that has become central to competition among crystalline silicon solar manufacturers as companies look to pair manufacturing scale with control over proprietary designs.

“Owning the intellectual property rights to leading silicon-based solar technologies is an important step to differentiate T1’s competitive position as a vertically integrated crystalline silicon U.S. solar manufacturer,” commented Dan Barcelo, chairman and CEO of T1 Energy. “We also believe that this intellectual property will be accretive to T1 economically in addition to yielding significant commercial and strategic benefits.”

Evervolt, a holding company that registered in Singapore in 2022 originally as “Elite Solar Holding,” had purchased the TOPCon patents and other solar IP from Trina Solar in 2025, and T1 Energy was licensing the technology from both companies. T1 now owns the patents and could license the technology in the future, shifting the company from a licensee to a direct owner of the relevant IP.

Portions of two of the TOPCon patents assumed to be sold to T1 were deemed “unpatentable” by the U.S. Patent and Trademark Office (USPTO) earlier this year after Trina claimed Runergy, Adani Green Energy (Mundra) and Canadian Solar were infringing.