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.
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.
Source: NREL Solar Radiation Database
Most South Carolina homeowners going solar in 2026 are looking at a gross investment of $31,500 – $61,500 — with returns outperforming the national average. The payback period is in line with the national median. South Carolina offers a state income tax credit up to $3,500 (25% of cost, max $3,500 (SC I-335)), plus a property tax exemption on solar-added home value.
Rates from EIA ($0.1571/kWh), sun hours from NREL. All figures use real location data and already factor in a 4%/year compounded electricity rate increase — giving you a realistic picture you can actually plan with. Use our free Solar Calculator for a personalized ZIP-level estimate.
Data: May 2026
Why Solar Panels in South Carolina Make Financial Sense
- 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. NREL and SEIA data 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 Calculator for your address. NREL research 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
| City | Peak Sun Hrs | Avg. Rate | Est. 10-Year Savings* | Est. Payback |
|---|---|---|---|---|
| Columbia SC | 5.18 hrs/day | $0.1512/kWh | $29,691 | 14 years |
| Myrtle Beach | 5.18 hrs/day | $0.1512/kWh | $29,499 | 14 years |
| Charleston SC | 5.18 hrs/day | $0.1512/kWh | $29,223 | 14 years |
| Greenville SC | 5.18 hrs/day | $0.1380/kWh | $29,031 | 15 years |
*$200/month bill, south-facing roof. NREL + EIA data. Use our free Solar Calculator for your exact address.
Solar Panels South Carolina vs. US Average
While South Carolina's rate of $0.1571/kWh is below the national average, 5.18 daily sun hours and a 3–5%/year rate increase trend make solar panels South Carolina a worthwhile long-term investment compared to other lower-rate states. Independent NREL and SEIA data consistently confirm solar panels South Carolina deliver positive lifetime returns across all household consumption levels at South Carolina's current rates.
| Factor | South Carolina | US Average | SC Advantage |
|---|---|---|---|
| Peak Sun Hours | 5.18 hrs/day | 5.18 hrs/day | +15% more |
| Solar Payback Period | ~14 years | 15 years (US avg) | 1 yr faster |
| 10-Year Savings* | $28,815 | $28,815 | $0 more |
| 25-Year ROI* | ~147% | ~147% (US avg) | +0% higher |
*$200/month bill reference. Sources: NSRDB (NREL), EIA.
How Much Can a South Carolina Family Save with Solar?
Most South Carolina families save $1,534 – $3,068 per 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.
Solar Incentives in South Carolina (2026)
Property Tax Exemption: South Carolina's property tax exemption ensures solar-added value is excluded from reassessment. Combined with the state tax credit, Dominion Energy and Duke Energy Carolinas customers have strong incentive stacking.
State Tax Credit: South Carolina offers a direct reduction to your state income tax bill — up to $3,500 (25% of cost, max $3,500). This is subtracted directly from taxes owed, not just your taxable income.
Net Metering: When your solar panels produce more than you use, the surplus flows to the grid and you earn a full credit at $0.1571/kWh — the same rate you'd pay to buy it back. Think of the grid as a free battery: you bank excess power during the day and draw from your credits at night.
South Carolina Solar FAQ
Most homeowners save $1,534 – $3,068 per year with solar panels South Carolina. At $0.1571/kWh and 5.18 sun hours, solar panels South Carolina pay back in ~15 years and generate $63,885 – $127,770 over 25 years. Use our Solar Calculator for your ZIP.
A typical South Carolina home needs a 8.4–16.4 kW system (21–41 panels), costing $31,500 – $61,500 at 2026 prices. South Carolina offers a state tax credit up to $3,500 — 25% of cost, max $3,500 (SC I-335). Use the calculator above for your exact numbers.
The federal solar tax credit (Section 25D, ITC) expired December 31, 2025 and is no longer available. South Carolina state tax credit up to $3,500 (25% of cost, max $3,500 (SC I-335)). South Carolina property tax exemption on solar-added home value. Net metering: Full Retail 1:1 — Full Retail 1:1— South Carolina maintains full retail net metering. Every kilowatt-hour your solar panels South Carolina export earns a full credit at $0.1571/kWh, significantly improving payback and 25-year ROI.
Solar in Nearby States
Curious how solar looks in other states? Check out the Solar by State hub →
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South Carolina solar data sourced from U.S. EIA, NREL, and DSIRE. Last updated May 2026. Estimates are illustrative averages — use our free Solar Calculator for personalized results.