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Both calculators run independently — change the inputs on either side to compare results.

Solar Payback Period Calculator (with Incentives)

Find how many years it takes solar to pay for itself after the federal tax credit and rebates, based on your install cost, system production, and electricity rate.

Gross system cost (before incentives) ($)

Tax credit / percentage incentive (%)

Flat rebates and incentives ($)

Annual energy production (kWh/yr)

Electricity price ($/kWh)

Solar Energy

Solar Savings Calculator

Calculate monthly bill savings from a solar PV system by multiplying solar production by your electricity rate. Use it to estimate the financial benefit of an installed or planned system month-by-month.

Monthly Solar Production (kWh)

Electricity Rate ($/kWh)

Key differences

	Solar Payback Period Calculator (with Incentives)	Solar Savings Calculator
Category	Solar Energy	Solar Energy
Inputs required	5	2
Result	Simple payback period (years)	Monthly Savings ($)
What it does	Find how many years it takes solar to pay for itself after the federal tax credit and rebates, based on your install cost, system production, and electricity rate.	Calculate monthly bill savings from a solar PV system by multiplying solar production by your electricity rate. Use it to estimate the financial benefit of an installed or planned system month-by-month.