How long is solar payback in South Carolina?

Solar payback in South Carolina typically runs 7–12 years depending on your electricity rate, system size, sun hours, and whether you qualify for the federal 30% Investment Tax Credit plus any South Carolina state incentives. Use the calculator above for a personalized estimate.

What solar incentives are available in South Carolina in 2026?

All South Carolina homeowners qualify for the federal 30% Solar Investment Tax Credit (ITC) on the gross system cost. South Carolina may also offer a state tax credit, rebates from your utility, or favorable net metering. See the calculator inputs above for South Carolina-specific values.

Is net metering available in South Carolina?

Net metering rules vary by state and utility. South Carolina has its own rules — full retail credit, time-of-use rates, or buyback programs. The calculator above factors in South Carolina's effective net metering value when estimating your monthly bill offset.

How many sun hours does South Carolina get?

South Carolina's average peak sun hours per day (NREL TMY3 data) determines how much solar your system can generate. The calculator above uses South Carolina-specific irradiance to size the system from your monthly electricity bill.

Should I buy solar panels or lease them in South Carolina?

Buying outright (cash or loan) lets you claim the 30% federal ITC and any South Carolina state credit, and you own the energy. Leasing or PPAs let the installer take the credit but you avoid upfront cost. For long-term value in South Carolina, ownership almost always wins.

Solar Payback in South Carolina (2026)

South Carolina has excellent solar economics — typical 6-8 year payback. The state offers a 25% state tax credit on solar installations (capped at $3,500 per tax year, $35,000 lifetime), which stacks on the federal 30% ITC. Combined with full retail net metering (where available), SC is one of the South’s better solar markets.

Use the calculator below — your state is already selected. Adjust your monthly electric bill and system cost for a South Carolina-specific payback estimate.

Solar Payback Calculator (by State)

Estimate your system size, total cost after incentives, and break-even year for residential solar.

State

Monthly electric bill Average across the year. Used to size the system.

Your electricity rate ($/kWh) Auto-filled from state average. Override with your real rate from your utility bill.

System cost ($/Watt) 2024 national avg ~$2.85/W gross, before incentives. Quotes range $2.50-3.50.

Financing

Utility rate inflation (% / yr) US average ~2.8% over last 25 years. EIA forecasts ~3% through 2050.

Estimated payback period

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Select your state to get a precise estimate.

System size

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25-year savings

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Net cost after credits

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Year-1 savings

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Cost breakdown

Net out-of-pocket

Get free solar quotes from local installers

Estimates only. Real solar quotes depend on your roof, shading, local installer pricing, utility net-metering policy, and your specific tax situation for the federal credit. Not financial advice.

Cumulative savings vs. system cost

When the green line crosses the dashed cost line, you’ve broken even.

SC solar incentive stack

1. Federal 30% ITC

Standard.

2. South Carolina 25% State Tax Credit

25% of installed cost, capped at $3,500/year and $35,000 lifetime. Carries forward 10 years if you can't use it all in one year.

3. Net metering (varies by utility)

Duke Energy Carolinas, Dominion Energy SC, and SCE&G offer net metering at retail rate for residential systems under 20 kW. Some have shifted to time-of-use or value-of-solar tariffs that pay less than retail for exports.

4. Property tax exemption

SC excludes solar's added home value from property tax for owner-occupied primary residences.

What 2026 SC solar economics look like

Gross system cost (7 kW): $19,600
Federal 30% ITC: -$5,880
SC 25% credit (capped $3,500/yr): -$3,500
Net cost: $10,220
Annual production: ~12,500 kWh
Annual savings at $0.135/kWh × 90% NEM: ~$1,519
Simple payback: ~6.7 years

How to use the South Carolina solar calculator above

The state is pre-selected. Adjust if needed.
Enter your typical monthly electric bill (averaged across the year).
The calculator auto-fills your state's average electricity rate and peak sun hours — override the electricity rate with your real $/kWh from your bill if you know it.
Adjust the system cost per watt based on quotes from local installers. South Carolina averages are typically within the $2.50–$3.50/W range for cash installs.
The output shows estimated system size, net cost after federal and state credits, year-1 savings, and 25-year cumulative savings.

Reviewed by the CalcCottage editorial team. Updated May 14, 2026. Estimates only — not financial advice. Verify current incentives at DSIRE.org before installing.

Solar Payback in South Carolina: Strong State Credit + Good Sun