What size system should I get?

The size of the system depends on how much energy you use and how much you want to spend on a PV system. Most customers apply for Level One, which means they get a system that generates 20 kilowatts (kw) or less, and they qualify for the expedited application review. Customers who get a system that generates more than 20 kW have a more in-depth application to complete and there is a charge associated with it.