Interactive tool

Solar Savings Calculator

Estimate system size, incentives, payback, and long-term savings before you request quotes.

Part of a bigger guide

Use this with the full incentives hub

This calculator works best alongside our solar and EV incentives hub so you can combine the current-law math with the most relevant policy and deadline context.

Open the incentives hub

Monthly electricity bill: $220StateI own my roof or homeUse the historical 2025 homeowner creditTurn this on only if the system was installed and paid for by December 31, 2025. New 2026 homeowner installs default to $0 federal credit.

Recommended system

4.9kW

Installed cost estimate

$13,965

Estimated state or local rebate

$700

Federal credit under current law

Net cost

$13,265

Annual savings

$2,270

Payback period

5.8 years

The federal solar tax credit for homeowner-purchased systems ended December 31, 2025. This estimate reflects current law unless you toggle the historical 2025 scenario. Check your state's incentives separately in our Tax Credit Guide.

Get real quotes for a 4.9kW system in CA