To realize even better savings, purchase grid tied panel systems. If your panels are connected, you might be able to sell extra power to the local utility. This should help you pay for your solar energy system and will also give you the option to draw power from the main grid in case your panels are not functioning.
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.