Solar TOOL
Solar Savings Calculator
Estimate annual bill offset. Use the calculator below with your own numbers.
Solar Savings Calculator
Estimate annual bill offset.
Change the example inputs to your own values. Check the method and limitations below.
How to use this calculator
Enter Annual production (kWh), Value per kWh ($). The result updates in your browser as you edit an input. The prefilled values are examples only.
How the estimate works
Multiply annual kWh by the value per kWh. Export compensation and time-of-use rates may change the actual value.
What can change the answer?
A produced kilowatt-hour may be worth less when exported than when used at home. Compare your utility tariff and export credits with the assumed value.
Before relying on the result
Check that the figures use the same units and period. Compare the result against a current label, quote, contract, employer policy, or official dataset when appropriate. This estimate does not include factors you have not entered.
Further reference
For source data or a more detailed method, see National Laboratory of the Rockies: PVWatts production model. The calculator does not automatically import data from this source.
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