Solar Panels - most bang for the buck

This map shows the solar energy potential by region in the United states for items such as photo-voltaics, solar hot water, and solar heating.

Don't forget, the map is interactive. Use your scroll wheel or +/- buttons to zoom in and out. Left click and drag to move the center of the map.

Hover the mouse cursor over a region to see more details since the map also tells you: how many houses can a solar panel power? (by location, assuming 100,000 square foot array).