Do not rush in selecting the first solar power system you come across. Before you make a commitment with a company, you need to make sure you cannot find any better deals elsewhere. Check out your town's federal, state, and local incentives first. You can find this information at the DSIRE database.
Here is an overview of the Multiaqua Chiller installed on my house. It is capable of cooling my house with 5 tons while running completely off of solar.