Updated: December 19, 2024 The Cleanenergyauthority.Org Solar Calculator is a service of CleanEnergyAuthority.org. Energy savings achieved and return on investment depend upon a number of factors that vary according to each customer's particular circumstances. Without limitation, these factors include: equipment used, solar system size, solar panel orientation and shading, insolation available, and applicable utility rates and rate structure, as well as customer's eligibility for rebates, incentives, and net-metering or similar programs (the availability of which may differ for each customer). Therefore, each customer's experience will vary, and the descriptions above may not represent the average customer's experience with home solar.