Solar Panels in Saint Peters, MO: Cost, Payback & Savings
A typical 8.8 kW home solar system in Saint Peters costs about $31,680 and pays for itself in about 15.8 years, saving roughly $23,399 over 25 years at Missouri's average electricity price of 14.0¢/kWh.
Monthly solar production in Saint Peters
Estimated output of a 8.8 kW south-facing roof system. Jun is the strongest month (1,298 kWh); Dec the weakest (630 kWh).
Solar production (kWh) Typical home use, 1,001 kWh/month
Solar payback calculator for Saint Peters
Pre-filled with Saint Peters's sunshine and Missouri'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 Saint Peters compares
- Each kW of panels here produces about 1,402 kWh a year — about the same as the Missouri median and 2% more than the US median city (1,371 kWh).
- Payback ranks #31 of 90 Missouri 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
Missouri offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 14.0¢ 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.
Missouri and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for Missouri and ask installers which programs they apply for you.
Frequently asked questions
Is solar worth it in Saint Peters, MO?
For a typical home, a solar system pays for itself in about 15.8 years and then keeps saving money. Over 25 years the estimated net savings are $23,399. Verdict: slow payback. Your own payback depends on your roof, your bill and the quotes you get.
How many solar panels do I need in Saint Peters, MO?
A home using 1,001 kWh a month (the Missouri average) needs about 22 panels of 400 W — a 8.8 kW system — to cover its annual use. Divide your own yearly kWh by 1,402 to get the kW you need.
How much do solar panels cost in Saint Peters, MO?
At 3.60 dollars per watt, a 8.8 kW system costs about $31,680 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.
How much sun does Saint Peters get?
Saint Peters averages 5.0 peak sun hours per day, so each kilowatt of panels produces about 1,402 kWh a year.
Does Missouri have net metering?
Yes. Power sent back to the grid is credited at or near the retail price (14.0¢ per kWh on average).
How much does electricity cost in Missouri?
Residential electricity in Missouri averages 14.0¢ per kWh, and a typical home uses 1,001 kWh a month (EIA).
Solar payback in nearby places
- O'Fallon15.9 yrs
- Dardenne Prairie15.8 yrs
- Saint Charles15.9 yrs
- Lake Saint Louis15.9 yrs
- Chesterfield16.4 yrs
- Bridgeton16.0 yrs
- Maryland Heights16.5 yrs
- Wentzville15.7 yrs