American Solar Energy Society www.ases.org www.findsolar.com
International Solar Energy Society www.ises.org
National Renewable Energy Laboratory www.nrel.gov
Solar Energy Industries Association www.seia.org
Solar Rating and Certification Corporation www.solar-rating.org
PVWatts https://pvwatts.nrel.gov/ Performance calculator for grid-connected solar power systems.
SAM (System Advisor Model) https://sam.nrel.gov/ Performance and financial model designed to help estimate costs for grid-connected power projects.
SRDM https://rredc.nrel.gov/solar/pubs/redbook/ Solar Radiation Data Manual for Flat-Plate and Concentrating Collectors for each of the 50 states, the Pacific Islands (Guam), and Puerto Rico.
RETScreen https://www.nrcan.gc.ca/energy/software-tools/7465 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 http://solardat.uoregon.edu/SunChartProgram.html Online tool creates sun path charts in Cartesian coordinates.
OpenPV https://openpv.nrel.gov/ 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 https://www.fcc.gov/media/radio/dms-decimal This utility permits the user to convert latitude and longitude between decimal degrees and degrees/minutes/seconds.
Solar Maps https://www.nrel.gov/gis/solar.html How much sun does your home state get per year?
Magnetic Declination https://www.ngdc.noaa.gov/geomag-web/ Declination is calculated using the current World Magnetic Model or the International Geomagnetic Reference Field model.
Solar ABCs http://www.solarabcs.org/about/publications/reports/expedited-permit/map/index.html Solar America Board for Codes and Standards
DSIRE http://www.dsireusa.org/ Database of State Incentives for Renewables & Efficiency
List of PV Modules https://gosolarcalifornia.org/equipment/pv_modules.php List of PV Panels by Gosolar California
List of Inverters https://gosolarcalifornia.org/equipment/inverters.php List of Inverters by Gosolar California
Roof Azimuth http://tools.solmetric.com/Tools/roofazimuthtool Online tool for locating a rooftop and estimating its azimuth using aerial images
NCPV https://www.nrel.gov/pv/national-center-for-photovoltaics.html National Center for Photovoltaics
FEMP https://www.energy.gov/eere/femp/federal-energy-management-program Federal Energy Management Program
IEA Solar Heating and Cooling Program. International Energy Agency. http://www.iea-shc.org
IEA Photovoltaic Power Systems Program. International Energy Agency. http://www.iea-pvps.org
ESTIF Solar Heat Europe http://solarheateurope.eu
WMO World Meteorological Organization https://www.wmo.int
European Commission Renewable Energy https://ec.europa.eu/energy/en/topics/renewable-energy
PVGIS solar radiation and PV performance European Commission Joint Research Centre http://re.jrc.ec.europa.eu/pvg_tools/en/tools.html