Size A Solar System

First you need to enter your monthly electricity usage

Our system-sizing tool will help you determine what size photovoltaic system you will need to achieve a good balance of costs and savings. To do this, you will need some previous electricity bills from the last 12 months. The more bills you have, the more precise this tool can be. We recommend at least one from each season.

Look through your bill to find kilowatts(kw) used for the month on each bill. Enter the number of kilowatts used in the boxes below. It is not necessary to write "kw", the number is all we need.

Electricity Bills


average hours of sun

Find your location on the map and determine how many hours of sun it receives on an average day.

Enter this number below: