Solar Panels in Arnold, MO: Cost, Payback & Savings
A typical 9.2 kW home solar system in Arnold costs about $33,120 and pays for itself in about 16.3 years, saving roughly $22,368 over 25 years at Missouri's average electricity price of 14.0¢/kWh.
Monthly solar production in Arnold
Estimated output of a 9.2 kW south-facing roof system. Jul is the strongest month (1,323 kWh); Dec the weakest (679 kWh).
Solar production (kWh) Typical home use, 1,001 kWh/month
Solar payback calculator for Arnold
Pre-filled with Arnold'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 Arnold compares
- Each kW of panels here produces about 1,351 kWh a year — 3% less than the Missouri median and about the same as the US median city (1,371 kWh).
- Payback ranks #72 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 Arnold, MO?
For a typical home, a solar system pays for itself in about 16.3 years and then keeps saving money. Over 25 years the estimated net savings are $22,368. 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 Arnold, MO?
A home using 1,001 kWh a month (the Missouri average) needs about 23 panels of 400 W — a 9.2 kW system — to cover its annual use. Divide your own yearly kWh by 1,351 to get the kW you need.
How much do solar panels cost in Arnold, MO?
At 3.60 dollars per watt, a 9.2 kW system costs about $33,120 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.
How much sun does Arnold get?
Arnold averages 4.9 peak sun hours per day, so each kilowatt of panels produces about 1,351 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).