Solar and Other Renewable Energies
ASHRAE Technical Committee 6.7


American Solar Energy Society
International Solar Energy Society
National Renewable Energy Laboratory
Solar Energy Industries Association
Solar Rating and Certification Corporation
PVWatts Performance calculator for grid-connected solar power systems.
SAM (System Advisor Model) Performance and financial model designed to help estimate costs for grid-connected power projects.
SRDM Solar Radiation Data Manual for Flat-Plate and Concentrating Collectors for each of the 50 states, the Pacific Islands (Guam), and Puerto Rico.
RETScreen Clean energy management software system for energy efficiency, renewable energy, and cogeneration project feasibility analysis as well as ongoing energy performance analysis.
Sun Path Chart Online tool creates sun path charts in Cartesian coordinates.
OpenPV The Open PV Project is a collaborative effort between government, industry, and the public that is compiling a comprehensive database of PV installation data for the United States.
Latitude and Longitude This utility permits the user to convert latitude and longitude between decimal degrees and degrees/minutes/seconds.
Solar Maps How much sun does your home state get per year?
Magnetic Declination Declination is calculated using the current World Magnetic Model or the International Geomagnetic Reference Field model.
Solar ABCs Solar America Board for Codes and Standards
DSIRE Database of State Incentives for Renewables & Efficiency
List of PV Modules List of PV Panels by Gosolar California
List of Inverters List of Inverters by Gosolar California
Roof Azimuth Online tool for locating a rooftop and estimating its azimuth using aerial images
NCPV National Center for Photovoltaics
FEMP Federal Energy Management Program
IEA Solar Heating and Cooling Program. International Energy Agency.
IEA Photovoltaic Power Systems Program. International Energy Agency.
ESTIF Solar Heat Europe
WMO World Meteorological Organization
European Commission Renewable Energy
PVGIS solar radiation and PV performance European Commission Joint Research Centre