Kentucky / St. Matthews
Is solar worth it in St. Matthews?
Louisville Gas & Electric Co averages 12.3¢/kWh. With 4.4 peak sun hours a day, a typical 8.1 kW system makes ~10,384 kWh a year and saves about $1,275 in year one.
No federal tax credit is included. The 30% homeowner credit (IRS §25D) ended for systems installed after Dec 31, 2025. What changed in 2026 →
How St. Matthews compares
That is slower than the Kentucky average of 13.2 years, mainly because St. Matthews's rate is below the state average of 13.2¢/kWh. Your own payback depends on your bill: enter your ZIP and monthly bill above for your number.
| Nearby city | Rate | Payback | 25-yr net |
|---|---|---|---|
| Lyndon | 12.3¢ | 14.3 yrs | $24,202 |
| Jeffersontown | 12.3¢ | 13.8 yrs | $25,101 |
| Louisville/Jefferson County | 12.3¢ | 13.8 yrs | $25,101 |
| Shively | 12.3¢ | 13.8 yrs | $25,101 |
| Mount Washington | 12.3¢ | 13.8 yrs | $25,101 |
| La Grange | 11.8¢ | 14.7 yrs | $22,575 |
| Shepherdsville | 12.3¢ | 13.8 yrs | $25,101 |
| Shelbyville | 11.8¢ | 14.2 yrs | $23,470 |
Questions
How long does solar take to pay off in St. Matthews, KY?
About 14.3 years for a typical 8.1 kW system at 12.3 cents/kWh, assuming $2.75/W installed, full net metering and 3% yearly rate increases, with no federal tax credit.
Is solar worth it in St. Matthews?
Only in some cases; payback is long. Our estimate is $1,275 saved in year one and $24,202 net over 25 years after paying for the system.
How much does a solar system cost in St. Matthews?
A 8.1 kW system sized for an average home (863 kWh/month) is about $22,275 before any local rebates, at $2.75 per watt. Real quotes vary by roof and installer.
Is there a federal solar tax credit in 2026?
Not for homeowners who buy their system. The 30% Residential Clean Energy Credit (IRS section 25D) does not apply to installations completed after December 31, 2025. State rebates, SRECs and utility incentives may still apply.
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