Solar Panel Cost in South Carolina
2026 estimates — federal ITC expired 12/31/2025
State incentives may still apply — see table below
7 kW system, standard monocrystalline panels. Payback: ~8–12 years. Updated June 2026.
Calculate Your South Carolina Solar Cost
South Carolina Solar Incentives — 2026
| Incentive | Value |
|---|---|
| Federal Residential ITC (Section 25D) | Expired 12/31/2025 |
| Systems installed before 1/1/2026 | 30% ITC still claimable |
| South Carolina state/utility incentives | Federal 30% ITC + possible state/utility incentives |
| Est. payback period (South Carolina) | ~8–12 years |
Federal residential ITC expired Dec 31, 2025 (One Big Beautiful Bill). Solar leases/PPAs: commercial credit continues through 2027. State incentives subject to change — consult a tax professional.
Solar System Size vs. Estimated Savings — South Carolina
Based on ~4.4 peak sun hours/day and estimated $11¢/kWh electricity rate in South Carolina.
| System Size | Gross Cost | Annual kWh | Annual Savings |
|---|---|---|---|
| 5 kW (small home) | $18,400 | 8,030 | $851/yr |
| 7 kW (average home)Most common | $25,760 | 11,242 | $1,192/yr |
| 10 kW (large home) | $36,800 | 16,060 | $1,702/yr |
| 12 kW (very large) | $44,160 | 19,272 | $2,043/yr |
Going Solar in South Carolina — Key Insights
1. South Carolina Solar Market Overview
South Carolina's mixed-humid climate offers moderate solar resources. Summers provide good solar production while winter months reduce output. The federal 30% ITC makes solar financially viable, especially with rising electricity rates.
2. Top Tip for South Carolina Solar Buyers
Compare multiple quotes in South Carolina — EnergySage shows that homeowners who compare 3+ quotes save an average of $5,000 on their solar system. Ask about performance guarantees and warranty terms carefully.
3. System Size Guide for South Carolina
Average South Carolina home uses ~1,000–1,200 kWh/month (higher in hot climates with AC). A 6–8 kW system typically covers most usage. Always get a system sized to 90–110% of your actual annual consumption — oversizing costs more without proportional benefit under most net metering policies.
FAQs — Solar Panels in South Carolina
Solar panels in South Carolina cost $20,240 on average for a 7 kW system before the 30% federal ITC. After the credit, net cost is ~$14,168. Payback periods in South Carolina typically run 8–12 years.
Solar is financially positive for most South Carolina homeowners, though the calculus changed in 2026 after the federal residential ITC expired on December 31, 2025. South Carolina's incentives: Federal 30% ITC + possible state/utility incentives. Estimated payback without federal ITC: 8–12 years. With a 25-year panel lifespan and rising electricity rates, solar still provides positive lifetime returns in most states.
Most South Carolina homes need a 5–10 kW system. A 7 kW system produces approximately 11,242 kWh/year in South Carolina. Divide your annual kWh usage by that figure to estimate the right size. Your installer will perform a site assessment to optimize for your specific roof and usage patterns.
Solar financing options in South Carolina in 2026: (1) Cash purchase — best long-term ROI; no federal ITC (expired 12/31/2025) but state incentives apply; typically $100–$250/month in energy savings. (2) Solar loan — own the system; pay from energy savings; rates 5–10% APR via GreenSky, Mosaic, or your installer. (3) Solar lease/PPA — $0 down; the solar company may still qualify for a commercial tax credit through 2027 and passes savings to you via rates below your utility bill — more competitive now that the homeowner cash ITC is gone. (4) HELOC — often lowest interest rate (6–8% APR). Avoid loans with "dealer fees" above 2% — these inflate the effective loan amount.
The ITC expiry changed the comparison. Previously, buying solar gave you a $6,072 federal credit (30% of cost) that leasing didn't — making buying clearly superior. In 2026, that credit is gone for new purchases, but solar companies (lease/PPA providers) can still claim a commercial credit through 2027 and may pass savings to you via lower lease rates. If your state has strong incentives (South Carolina's state credit further benefits purchase), buying/financing still typically produces better 25-year returns. Leasing makes sense for zero upfront cost with still-lower-than-utility rates.
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South Carolina Solar Summary
- →Avg cost: $20,240 (7 kW)
- →Federal ITC: Expired 12/31/2025
- →Range: $17,204 – $23,883
- →Est. payback: 8–12 years
- →Incentives: Federal 30% ITC + possible state/utility incentives