Renewable energy

UL is the leading product certification company in the renewable and alternative energy testing industry as well as the preferred choice of U.S. regulatory officials. UL offers manufacturers in the renewable energy businesses an unmatched combination of technical and regulatory expertise that will help them through the certification process in the most effective way possible.

Photovoltaics

Photovoltaic (PV) technologies have begun with the use of treated crystalline silicon operating as a semiconductor to generate a flow of direct current electricity when exposed to light. Although crystalline silicon is still the majority of the industry, newer thin film polymer and semi-conducting molecule PV technologies are evolving and allowing PV use in products such as flexible roofing applications.  Learn more.

Wind

UL provides market access for Wind Systems - Wind-Turbine-Generator-Systems or WTGS and electrical subassemblies, applicable both to stand-alone (not grid-connected) or utility interactive applications. Learn more.