Calculating the payback on an investment in a solar photovoltaic (PV) system depends on a number of variables, including size and cost of the installation, electric utility rebates, location of the solar array, equipment maintenance costs, future energy costs, and future inflation rates.
This Solar Energy Payback Calculator allows you to estimate the economic and environmental value of different types of photovoltaic installations, and when your investment will be paid back. You decide which factors to include, and you use the sliders to adjust the values of those factors, to see how they impact payback. Note: This calculator is included for discussion purposes only. Consult a financial analyst or tax attorney for complete advice specific to your situation.