PVEL’s PVUSA test center was one of North America’s first solar power plants and has a deep history in the US solar industry. Initially developed by PG&E to study the impact of high penetration solar on the electrical grid, the California Energy Commission’s internationally recognized PTC rating was developed at the PVUSA site. Due to PVUSA’s unique research status, PVEL’s testing program can accommodate non-UL listed products and prototypes – an opportunity seized by many of North America’s premier module and inverter manufacturers.