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 $0.16/kWh and 5.18 peak sun hours daily, solar panels in South Carolina typically generate $1,800-$3,600 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 $0.16/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 ~13 years.

Most South Carolina homeowners going solar in 2026 are looking at a gross investment of $30,000 – $58,500 — with returns outperforming the national average. The payback period is roughly 2 years shorter than the US 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.

Why Solar Panels in South Carolina Make Financial Sense

• At $0.16/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 $15,000 – $25,000 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 $0.16/kWh, maximizing year-round financial return

South Carolina law protects solar-added home value from property tax — your assessed value rises by $15,000 – $25,000 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.

Solar Panels South Carolina vs. US Average

While South Carolina's rate of $0.16/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.

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.

Learn more about Solar Incentives →

Next Steps: Going Solar in South Carolina

• 1

  Calculate your savings Use our Solar Savings Calculator to estimate your exact system size, cost, and payback for your South Carolina ZIP code.
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• 2

  Learn the basics New to solar? Our Solar Basics Guide covers how panels work, sizing, and what to expect before you get quotes.
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• 3

  Check your incentives Review the property-tax, sales-tax, and net-metering programs available in South Carolina in our Solar Incentives Guide.
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• 4

  Get dealer & installer quotes Compare pricing, financing terms, and whether the installer is registered for any South Carolina rebate program before you sign.
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Solar in Nearby States

Electricity rates and sun hours vary by region — see how solar compares in neighboring states: Georgia and North Carolina.

Curious how solar looks elsewhere? Check out the Solar by State hub →