Solar Panels in Janesville, WI: Cost, Payback & Savings
A typical 6.0 kW home solar system in Janesville costs about $23,400 and pays for itself in about 13.4 years, saving roughly $25,670 over 25 years at Wisconsin's average electricity price of 19.0¢/kWh.
Monthly solar production in Janesville
Estimated output of a 6.0 kW south-facing roof system. Jul is the strongest month (945 kWh); Dec the weakest (379 kWh).
Solar production (kWh) Typical home use, 645 kWh/month
Solar payback calculator for Janesville
Pre-filled with Janesville's sunshine and Wisconsin's average electricity price. Enter your own bill and an installer's price per watt to see your payback.
Leave export credit blank where the utility offers full net metering. Where exports earn less, solar used at home as it's produced is worth the full price and the rest earns the export credit.
How Janesville compares
- Each kW of panels here produces about 1,346 kWh a year — about the same as the Wisconsin median and about the same as the US median city (1,371 kWh).
- Payback ranks #10 of 96 Wisconsin places we cover.
- Sunshine varies little across a state; electricity price, installed cost and how utilities credit exported power drive most of the difference between states.
Net metering, tax credits and incentives in 2026
Wisconsin offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 19.0¢ here.
There is no federal tax credit for buying home solar installed in 2026. The 30% Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025, so the costs and paybacks on this page include no federal credit.
Wisconsin and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for Wisconsin and ask installers which programs they apply for you.
Frequently asked questions
Is solar worth it in Janesville, WI?
For a typical home, a solar system pays for itself in about 13.4 years and then keeps saving money. Over 25 years the estimated net savings are $25,670. Verdict: solid long-term investment. Your own payback depends on your roof, your bill and the quotes you get.
How many solar panels do I need in Janesville, WI?
A home using 645 kWh a month (the Wisconsin average) needs about 15 panels of 400 W — a 6.0 kW system — to cover its annual use. Divide your own yearly kWh by 1,346 to get the kW you need.
How much do solar panels cost in Janesville, WI?
At 3.90 dollars per watt, a 6.0 kW system costs about $23,400 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.
How much sun does Janesville get?
Janesville averages 4.7 peak sun hours per day, so each kilowatt of panels produces about 1,346 kWh a year.
Does Wisconsin have net metering?
Yes. Power sent back to the grid is credited at or near the retail price (19.0¢ per kWh on average).
How much does electricity cost in Wisconsin?
Residential electricity in Wisconsin averages 19.0¢ per kWh, and a typical home uses 645 kWh a month (EIA).
Solar payback in nearby places
- Beloit13.3 yrs
- Whitewater13.6 yrs
- Stoughton13.4 yrs
- Fort Atkinson13.4 yrs
- Elkhorn13.5 yrs
- Oregon13.3 yrs
- Fitchburg13.4 yrs
- Monroe13.5 yrs