Alternative energy calculator

American Solar Energy

Database of State Incentives Renewable

Database of all energy tax

Illinois Clean Energy Community

Illinois Department of Commerce & Economic

Illinois Renewable Energy Association

Illinois Solar Energy Association

Interstate Renewable Energy Council

National Renewable Energy Laboratory


Solar Energy Industries Association

US Department of Energy – Solar Programs


US Department of Energy

Guide to Purchasing Green Power

EPA’s Guide to Purchasing Green Power (PDF) (50 pp, 1.1MB) provides current and potential buyers of green power with information about green power purchasing. The Guide includes information about the different types of green power products, the benefits of green power purchasing, and how to capture the greatest benefit from your purchase. The Guide is the product of a cooperative effort between the EPA, the U.S. Department of Energy, the World Resources Institute, and the Center for Resource Solutions.

In My Backyard (IMBY) Solar and Wind Placement Tool

The In My Backyard (IMBY) tool developed by NREL estimates solar photovoltaic (PV) array and wind turbine electricity production based on your specifications of system size, location, and other variables. IMBY uses a Google Maps interface to allow you to choose a system location with pinpoint accuracy. It then draws data for that location from one of NREL’s renewable resource databases to estimate your potential electricity production.

Photovoltaics (PV) Value Clearinghouse

The Photovoltaics (PV) Value Clearinghouse was developed by NREL and Clean Power Research to provide users with a searchable database of analyses of distributed power applications with an emphasis on distributed power technology benefits and costs. This information will be helpful for anyone looking for analysis methodologies and results of solar power cost/benefit analyses.

PV Watts Calculator

NREL’s PVWattsâ„¢ calculator determines the energy production and cost savings of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, installers, manufacturers, and researchers to easily develop estimates of the performance of hypothetical PV installations.

Solar Energy Technologies Program

The Solar Energy Technologies Program focuses on developing cost-effective solar energy technologies that have the greatest potential to benefit the nation and the world. Subprograms focus on photovoltaics, concentrating solar power, systems integration, and market transformation.

The Installed Cost of Photovoltaics in the U.S.

Tracking the Sun: The Installed Cost of Photovoltaics in the U.S. from 1998-2007summarizes trends in the installed cost of grid-connected PV systems in the United States from 1998 through 2007. The report is based on an analysis of installed cost data from nearly 37,000 residential and non-residential PV systems, totaling 363 MW of capacity, and representing 76% of all grid-connected PV capacity installed in the U.S. through 2007.

Federal Wind Siting Information Center

The Federal Wind Siting Information Centeris part of the federal government’s effort to support the increased deployment of wind energy facilities on public, private, and tribal lands, airspace, and offshore. This site is a resource for information on the siting of wind turbines and Federal activities to support the increased deployment of wind energy.

Utility Wind Integration Group

The mission of the Utility Wind Integration Group (UWIG)is to accelerate the development and application of good engineering and operational practices supporting the appropriate integration of wind power into the electric system.

Wind Powering America

Wind Powering America is a commitment to dramatically increase the use of wind energy in the United States. WPA concentrates its efforts in “stuck” markets; develops innovative pilot projects; replicates successes; and develops and disseminates targeted information, analyses, and tools.

Small Wind Electric Systems in Illinois