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RayValueSolar math for your home

See if solar pays off on your home — using your actual utility rates

The federal tax credit is gone, so we show Florida and California homeowners honest cost, savings and payback ranges from their own utility’s rates.

  • Free
  • No sign-up for the calculator
  • Every assumption shown
  • Independent, not a utility
Aerial view of a California home with dark solar panels on its red tile roof, palm trees and a backyard pool

Choose your state

How it works

  1. Step 1

    Tell us about your home

    Pick your state and utility, then enter your average monthly bill and whether you want a battery.

  2. Step 2

    We run the numbers

    We size a system to your usage, estimate local sun, and apply your utility’s actual rate and export rules.

  3. Step 3

    See a realistic range

    Get low, likely and high estimates for cost, savings and payback, with every assumption listed.

Curious about the details? Read our methodology.

How RayValue works for you

See the affiliate disclosure.

What’s happened with solar in Florida and California

Publicly reported events, each linked to the original reporting.

See all stories

Frequently asked questions

Does solar still make sense without the federal tax credit?
For some homes it does and for others it does not, which is why the calculator exists. The federal residential credit has ended for new installs, so we apply none. Whether solar pays back depends on your utility’s rates, how much power you use, how much sun your roof gets and what an installer charges, and some results show that it will not pay back within the analysis period.
How accurate is the calculator?
It gives estimates, shown as low, likely and high ranges, not quotes. It uses your utility’s published rates, a solar production model for your location, and cost ranges for your state, and it lists every assumption. It does not include financing costs, maintenance, or inverter and battery replacement, and your installer’s price and your actual usage will differ.
Is RayValue really free?
Yes. The calculator needs no sign-up, and asking for installer quotes costs you nothing and does not obligate you to buy anything. Homeowners never pay RayValue.
How do you make money?
Installers pay RayValue for introductions to homeowners who ask to hear from them, and some pages include affiliate links, which are labeled. Those relationships do not change the calculator’s math: every rate, cost and assumption it uses is listed on the methodology page.

More questions? See the questions about quotes and your contact details, or read solar lease vs buy.

Ready to see your numbers?

It takes about a minute, it’s free, and no federal tax credit is assumed.

or get installer quotes