Florida / Marathon
Is solar worth it in Marathon?
Florida Keys El Coop Assn, Inc averages 12.9¢/kWh. With 5.9 peak sun hours a day, a typical 6.0 kW system makes ~10,350 kWh a year and saves about $1,339 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 Marathon compares
That is about the same as the Florida average of 10.3 years, mainly because Marathon's rate is below the state average of 14.6¢/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 |
|---|---|---|---|
| Key West | 12.9¢ | 10.6 yrs | $32,416 |
| Florida | 13.7¢ | 10.7 yrs | $33,880 |
| Homestead | 13.7¢ | 10.7 yrs | $33,880 |
| Cutler Bay | 13.7¢ | 10.7 yrs | $33,880 |
| Palmetto Bay | 13.7¢ | 10.7 yrs | $33,880 |
| Pinecrest | 13.7¢ | 10.7 yrs | $33,880 |
| Coral Gables | 13.7¢ | 10.7 yrs | $33,880 |
| South Miami | 13.7¢ | 10.7 yrs | $33,880 |
Questions
How long does solar take to pay off in Marathon, FL?
About 10.6 years for a typical 6.0 kW system at 12.9 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 Marathon?
Often, if you plan to stay long-term. Our estimate is $1,339 saved in year one and $32,325 net over 25 years after paying for the system.
How much does a solar system cost in Marathon?
A 6.0 kW system sized for an average home (863 kWh/month) is about $16,500 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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