The above results are dependant on available roof space and sunlight. Higher quality systems and installations will yield higher energy output and savings. The potential energy bill savings depend on how much solar power you are able to use in the home at the time of generation. You will typically save around 28 to 35 cents a kWh (depending on how much you pay for your power). Combined with 5-12 cents a kWh for the power you send back to the grid. Depending on when you use most of your power, a battery may be required to achieve higher savings amounts.