Oklahoma vs South Carolina Solar Comparison
Oklahoma gets more sun (5.1 hrs/day) while South Carolina has the faster payback (9 years).South Carolina offers higher 20-year savings at $33,200.
Oklahoma
5.1 hrs
10.5yr payback
$28,400
20yr savings
South Carolina
4.8 hrs
9yr payback
$33,200
20yr savings
Side-by-Side Comparison
| Metric | Oklahoma | South Carolina |
|---|---|---|
| Peak Sun Hours | 5.1 hrs | 4.8 hrs |
| Cost per Watt | $2.95 | $2.85 |
| 6kW System Cost | $17,700 | $17,100 |
| Federal Tax Credit | 30% | 30% |
| State Tax Credit | None | 25% |
| State Rebate | None | None |
| Net Metering | Partial Net Metering | Full Net Metering |
| Electricity Rate | 12.82¢/kWh | 14.43¢/kWh |
| Payback Period | 10.5 years | 9 years |
| 20-Year Savings | $28,400 | $33,200 |
Verdict
South Carolina is the better state for solar ROI with $33,200 in 20-year savings and a 9-year payback period. Oklahoma has more sun exposure at 5.1 hrs/day, making it ideal for maximum energy production. Both states qualify for the 30% federal solar tax credit.
Frequently Asked Questions
Is solar better in Oklahoma or South Carolina?
Oklahoma gets more sun (5.1 peak hours/day vs 4.8). South Carolina has a faster payback (9 years) and South Carolina offers higher 20-year savings ($33,200).
How do solar costs compare between Oklahoma and South Carolina?
A 6kW system costs $17,700 in Oklahoma vs $17,100 in South Carolina before incentives. Both qualify for the 30% federal tax credit.
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Data verified March 2026 · Source: NREL, DSIRE, EIA