Solar Panels South Carolina: Costs, Savings & Payback
The Real Cost of Waiting for Solar Panels in South Carolina
Dominion Energy SC, Duke Energy Carolinas raised rates by up to 8% in the past year — a 3–5% per year trend over the past decade. At South Carolina's current $0.1571/kWh and 5.18 peak sun hours daily, solar panels in South Carolina typically generate $1,534 – $3,068 in annual savings, and that number grows as rates climb.
To give you a reliable picture, these estimates are built on strictly conservative assumptions: no expired incentives, includes ~4%/yr electricity rate increases (EIA historical avg), Full Retail NEM (1:1) — every exported kWh credited at full rate. While other sites inflate their numbers to close a sale, we show reality — so the savings you see here are savings you can actually count on.
Savings Calculator — South Carolina
Estimated savings for a $200/month bill
ZIP-accurate estimate: Enter your ZIP for exact rates & sun hours.
Get My Exact Savings →South Carolina Solar Data at a Glance
South Carolina solar panels make financial sense in 2026 despite a below-average electricity rate of $0.1571/kWh. The key driver: 5.18 daily sun hours and a 3–5%/year rate increase trend that makes every year of delay more expensive. Solar panels in South Carolina typically pay back in ~15 years.
📊 Data Sources
Rates: EIA/ElectricChoice May 2026 · Sun hours: NREL NSRDB · Incentives: DSIRE · Calculations: South Carolina avg for $200/mo bill at 5.08 peak sun hrs/day, $0.1521/kWh, $3.75/W install cost.
Why Solar Makes Financial Sense in South Carolina
- At $0.1571/kWh, South Carolina's rate is below average — but 5.18 daily sun hours and a 3–5%/year rate increase trend still make solar panels South Carolina a sound long-term investment
- 5.18 peak sun hours daily — enough to consistently offset the majority of household electricity consumption with solar panels in South Carolina
- South Carolina exempts solar-added home value from property tax reassessment — your assessed value rises by $28,350 – $56,700, but you pay no additional property tax on that increase
- Full retail net metering means every exported kilowatt-hour from your solar panels in South Carolina earns a full credit at $0.1571/kWh, maximizing year-round financial return
South Carolina law protects solar-added home value from property tax — your assessed value rises by $28,350 – $56,700, but you pay no additional property tax on that amount.NLRandSEIAdata consistently show solar panels South Carolina delivering positive lifetime returns, particularly for Dominion Energy SC and Duke Energy Carolinas customers, where residential rates have climbed 3–5% per year.Use our Solar Calculatorfor your address.NLRresearch shows solar panels South Carolina retain 87–92% of their output after 25 years — meaning the South Carolina solar investment keeps delivering well beyond the payback window.
Top Solar Cities in South Carolina
10-year savings for a $200/month bill. Enter your ZIP for a ZIP-accurate estimate.
| City | Peak Sun | Rate ($/kWh) | 10-yr Savings | Payback |
|---|---|---|---|---|
| Columbia SC | 5.15 hrs | $0.1512/kWh | $24,577 | 16 years |
| Myrtle Beach | 5.3 hrs | $0.1512/kWh | $24,396 | 16 years |
| Charleston SC | 5.25 hrs | $0.1512/kWh | $24,396 | 16 years |
| Greenville SC | 5 hrs | $0.1380/kWh | $24,480 | 17 years |
South Carolina vs. US Average
How does South Carolina stack up against the national average for a $200/month bill?
| Metric | South Carolina | US Average | Advantage |
|---|---|---|---|
| Electricity Rate | $0.1521/kWh | $0.1805/kWh | Lower rate |
| Peak Sun Hours | 5.08 hrs/day | 4.5 hrs/day | More sun = more output |
| 10-Year Savings | $24,396 | $24,504 | $108 less than US avg |
| 25-Year ROI | ~100% | ~110% | -10% |
| Payback Period | ~16 years | ~15 years | 1 yrs slower |
How Much Can a South Carolina Family Save with Solar?
Most South Carolina families save$1,534 – $3,068per year with solar panels. Homes with high AC loads or EV charging benefit most in South Carolina — Dominion Energy and Duke Energy Carolinas customers benefit from the state's retail NEM, state tax credit, and property tax exemption.
Ready to see your exact South Carolina savings? Our free calculator uses your ZIP code, roof orientation, and bill size for a personalized estimate.
Calculate My Savings →Solar Incentives in South Carolina (2026)
South Carolina law exempts the added home value from solar from property taxes. Your home value increases — your tax bill doesn't. · State tax credit: 25% of system cost, max $3,500 (SC I-335).
Net Metering: Full Retail Net Metering. Excess power sent to grid earns retail-rate credits.
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Data last updated: 2026 · Sources: EIA, NREL, DSIRE, SEIA