Solar Calculator

The three inputs are:

1. Annual kwh per installed watt of solar panel for your area. About 1.36 kwh/watt is typical for Southeast USA
2. Current electric rate, the variable portion. TVA is about 12.1 cents/kwh. National average is about 17.5 cents/kwh.
3. Expected annual escalation rate for variable electric rate, .02 equals 2%. Expected range is 2% to 6%

The input values are drop boxes, adjust up or down with the arrows.

The output results are the cumulative savings per installed watt by year. Compare this table to your installed solar cost in $/watt to determine years to pay back your investment.

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Solar Savings Calculator ($/watt)

Results ($/watt)