Solar Panels in Irmo, SC: Cost, Payback & Savings
A typical 8.8 kW home solar system in Irmo costs about $31,680 and pays for itself in about 13.6 years, saving roughly $33,816 over 25 years at South Carolina's average electricity price of 15.9¢/kWh.
Monthly solar production in Irmo
Estimated output of a 8.8 kW south-facing roof system. May is the strongest month (1,287 kWh); Dec the weakest (805 kWh).
Solar production (kWh) Typical home use, 1,050 kWh/month
Solar payback calculator for Irmo
Pre-filled with Irmo's sunshine and South Carolina'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 Irmo compares
- Each kW of panels here produces about 1,461 kWh a year — about the same as the South Carolina median and 7% more than the US median city (1,371 kWh).
- Payback ranks #18 of 58 South Carolina 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
South Carolina offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 15.9¢ 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.
South Carolina and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for South Carolina and ask installers which programs they apply for you.
Frequently asked questions
Is solar worth it in Irmo, SC?
For a typical home, a solar system pays for itself in about 13.6 years and then keeps saving money. Over 25 years the estimated net savings are $33,816. 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 Irmo, SC?
A home using 1,050 kWh a month (the South Carolina average) needs about 22 panels of 400 W — a 8.8 kW system — to cover its annual use. Divide your own yearly kWh by 1,461 to get the kW you need.
How much do solar panels cost in Irmo, SC?
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 Irmo get?
Irmo averages 5.3 peak sun hours per day, so each kilowatt of panels produces about 1,461 kWh a year.
Does South Carolina have net metering?
Yes. Power sent back to the grid is credited at or near the retail price (15.9¢ per kWh on average).
How much does electricity cost in South Carolina?
Residential electricity in South Carolina averages 15.9¢ per kWh, and a typical home uses 1,050 kWh a month (EIA).
Solar payback in nearby places
- Seven Oaks13.9 yrs
- Saint Andrews13.7 yrs
- Oak Grove13.7 yrs
- Lexington13.8 yrs
- West Columbia13.8 yrs
- Columbia13.7 yrs
- Cayce13.8 yrs
- Red Bank13.8 yrs