Solar Calculators

Free tools to estimate the cost, size, savings and payback of a home solar system. No sign-up required.

Solar Savings Calculator

Estimate system size, cost, payback and 25-year savings from your electric bill.

Find how many panels and what system size you need to power your home.

See how many years until your solar investment pays for itself.

Yearly cost to charge an electric car at home vs gas.

How much battery capacity you need for backup power.

Value of the federal tax credit and your net cost.

Compare local installers — no obligation.