RETC, part of the VDE Group Email Format

Renewable Energy Semiconductor ManufacturingCalifornia, United States11-50 Employees

RETC, part of the VDE Group, is an independent testing and certification laboratory focused on solar and energy storage products. Since 2009, it has provided trusted, third-party data on performance, reliability, and bankability to solar manufacturers, developers, financiers, and independent engineers. Headquartered in Fremont, California, with facilities in Tempe, Arizona, RETC supports global testing and certification efforts across the energy transition and an expanding range of market segments.

By generating independent data for PV modules, inverters, battery energy storage components, and racking products, RETC helps reduce friction across operational functions and informs technical diligence and stakeholder alignment. Its Thresher Test Program is widely used to evaluate long-term durability of solar technologies and to inform procurement, financing, and insurance decisions. The company operates in the renewable energy semiconductor manufacturing sector and serves a global customer base. In June 2025, RETC CA was recognized as the Overall Highest Achiever in RETC's Thresher Test program.

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