The U.S. minimum inspection requirements for all types of electrical installations, including solar systems.

The U.S. trade association that develops standards for the electrical manufacturing industry.

A practice used in conjunction with a solar electric system where your electric meter tracks your net power usage, spinning forward when you use electricity from the utility, and spinning backward when your system is generating more electricity than you need.

The National Renewable Energy Laboratory. A national lab that concentrates on studying and developing renewable energy sources.