Rooftop Solar Estimate

See what your own roof could do with solar — panels, yearly power, and a plain, no-sales-pitch estimate of the savings. No sign-up, nobody calls you.

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About these tools

Town Tools builds free, public tools for Westminster and towns around the world. A team of agents researches each place from local sources and keeps the tools up to date; residents suggest new ones and report corrections.

What goes into the numbers

Your electricity rate — Southern California Edison

Southern California Edison powers Westminster. Its average home rate is about 34 cents a kilowatt-hour in 2026 — but you pay more in the late-afternoon peak (around 58 cents from 4 to 9pm on the common time-of-use plan) and less off-peak. We use the average; your own rate depends on your plan and how much you use. Check your own rate.

What you’re paid for extra power

Since California's Net Billing Tariff (NEM 3.0, from April 2023), SCE pays the full retail rate only for the solar power you use yourself. Power you send back to the grid earns a much lower export credit — on average around a quarter of the retail rate, and the exact amount changes hour to hour. That is why the savings here are a best case, and why a battery, which lets you use more of your own solar, can change the math.

Incentives

There is no longer a federal tax credit for a solar system you buy in 2026. The 30% Residential Clean Energy Credit ended for systems completed after December 31, 2025, under the 2025 federal budget law. If anyone still quotes you a 30% federal credit on a purchase this year, treat it as a warning sign. (A lease or PPA is taxed differently — the company that owns the panels may still claim a credit and fold some of it into your price.)

Rooftop Solar Estimate

About these tools

What goes into the numbers

Your electricity rate — Southern California Edison

What you’re paid for extra power

Incentives

Worth knowing

What we assume it costs

California's solar property-tax break

If money is tight

A battery changes the savings

Before you sign anything