Green Energy Ohio
For Ohioans interested in any aspect of renewable energy, also has great links.

Dsire
Click on Ohio within the map
Ohio Incentives for Renewables and Efficiency

Ohio Public Utilities Commission
Public Utilities Commission of Ohio

U.S. Department of Energy
Click on solar energy technologies link or wind & hydropower technologies link

Renewable Energy World
good website for resources on renewable energy

Solar4Power
Very good site for system sizing and definitions

Consumer Energy Center
Awesome Renewable Energy Estimator