South Carolina Solar Guide 2026
Everything South Carolina homeowners need to know: costs, incentives, net metering policy, and what makes this state unique for solar.
Quick answer
South Carolina solar economics depend mainly on 5 average peak sun hours, an estimated $2.8/W installed cost, 14.0¢/kWh electricity, and the state's current net-metering rules.
Reviewed 2026-07-26
- Best for
- South Carolina homeowners comparing solar costs, incentives, and payback assumptions.
- Inputs needed
- annual kWh usage, utility rate, installed $/W, net-metering policy
- Formula used
- Typical production = system kW × peak sun hours × 365.
- Source checked
- state incentive data, utility tariff checks, Wattcrunch price benchmarks
Key fact about South Carolina solar
South Carolina's 25% state tax credit (up to $3,500/year, spreadable over 10 years) is one of the most generous state incentives in the Southeast, largely compensating for the end of the federal credit.
Peak sun hours
5
hrs/day avg
Avg electricity rate
14.0¢
per kWh
Median install cost
$2.8/W
before incentives
Typical payback
9 yrs
8 kW system, avg usage
Typical 8 kW system in South Carolina
Annual production
14,600 kWh
Year-1 savings
$2,044
System cost (est.)
$22,400
No federal tax credit — Section 25D expired December 31, 2025.
South Carolina Net Metering Policy
Full retail net metering (by law)
South Carolina mandated full retail net metering in 2014. Duke Energy and Dominion Energy SC must credit exports at retail. Monthly net excess rolls forward annually.
South Carolina Solar Incentives
Available in addition to any utility rebates. Federal 25D credit is $0 for homeowner-owned systems from 2026.
- ✓State income tax credit: 25% of cost (up to $3,500/year)
- ✓Property tax exemption
- ✓Sales tax exemption on solar equipment
Top Utilities in South Carolina
Interconnection timeline: 4–8 weeks
State-specific decision guide
What to verify before signing a South Carolina solar quote
In South Carolina, the financial result depends on more than sunshine or the headline installation price. Confirm the export rule, program eligibility date, and interconnection timeline for your exact utility before treating a payback estimate as a promise.
Export value
This page models full retail net metering (by law). Ask which tariff and export credit apply to your account, not only which program name appears in the proposal.
Incentive eligibility
Check equipment, income, installer, application, and placed-in-service rules before subtracting an incentive from the quote. Programs can close or change terms.
Interconnection
Budget for the published 4–8 weeks and confirm who pays for a required meter, service upgrade, or engineering review.
Source trail: production assumptions use NREL PVWatts; incentive discovery should be checked against DSIRE; electricity-market context is available from the EIA. Confirm final tax treatment with the IRS and your utility.
Calculate your South Carolina solar economics
Our calculators are pre-filled with South Carolina data. Run any tool below.