www.dsireusa.org
Database of State Incentives for Renewables and Efficiency

www.nrel.gov
National Renewable Energy Laboratory A great source of information on renewable energy solutions, solar systems technology, and comprehensive weather data

www.solar-rating.org
Solar Rating and Certification Corporation (SRCC) has national rating standards for solar energy equipment.

www.nabcep.org
North American Board of Certified Energy Practitioners (NABCEP) is a volunteer board of renewable energy stakeholders whose mission it to support and work with renewable energy professionals and to develop and implement quality credentialing and certification programs

www.usgbc.org
LEED is a rating system for buildings that was designed by the US Green Building Council (USGBC). The program promotes environmentally sustainable building systems.

www.energystar.gov
ENERGY STAR is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy helping us all save money and protect the environment through energy efficient products and practices.