From their home page: “DSIRE is a comprehensive source of information on state, local, utility, and federal incentives that promote renewable energy and energy efficiency.”

If you’re an American thinking about setting up a solar power system in your home, it’s worth checking this out. What’s great is that you can search by state, technology, incentive type, etc. Even if you’re not planning on setting up such a system, it’s interesting to compare what different states are up to.