Complete Guide to Solar Energy in South Carolina
Your complete resource for solar energy. Everything you need to know about solar laws, solar costs, solar financing, and solar installation in South Carolina.
Why South Carolina is Excellent for Solar Energy
Outstanding Solar Potential
South Carolina receives over 216 sunny days per year, exceeding the national average of 205 days. The state ranks #12 nationally for solar irradiance with 5.72 peak sun hours daily in summer, providing excellent conditions for year-round solar generation.
Rising Electricity Costs
With residential rates averaging 14.89¢/kWh and climbing, solar provides significant long-term savings. Duke Energy and Dominion Energy both implemented substantial rate increases in 2026: Duke customers see average increases of $6.42/month, while Dominion seeks a 12.7% increase (~$20/month) starting July 2026.
Generous State Tax Credit
South Carolina offers one of the nation’s strongest state solar incentives: 25% of total system costs as a state tax credit, up to $3,500 annually for up to 10 years (total maximum $35,000).
Property Tax Exemption
Starting in 2025, South Carolina implemented a statewide property tax exemption for residential solar systems up to 20 kW. Your property taxes won’t increase despite the significant value solar adds to your home.
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Laws & Regulations
South Carolina state tax credit (25% up to $35,000), property tax exemption for systems ≤20 kW, net metering (transitioning to Solar Choice program January 2026), and HOA considerations (no statewide solar access protections currently).
Residential Solar
Complete guide for homeowners covering system sizing for South Carolina’s humid subtropical climate (7-8kW typical), high-efficiency panels optimized for heat and humidity, inverter options, roof requirements for hurricane zones, benefits of battery storage as net metering transitions to Solar Choice program.
Costs & Savings
2026 pricing breakdown ($2.51/watt average), cost analysis by utility providers (Duke Energy, Dominion Energy, Santee Cooper, electric cooperatives), state tax credit, payback period estimations (10-11 years), lifetime savings exceeding $50,000 over 25 years.
Financing Options
Solar loans with competitive rates (4%-9% APR typical), lease agreements, Power Purchase Agreements (PPAs), Santee Cooper rebates and low-interest loans for eligible customers, strategies to maximize state tax credit benefits.
Installation Guide
Choosing licensed South Carolina solar contractors, understanding permit requirements across 46 counties, navigating HOA approval processes (no state-level protections), installation timeline for coastal hurricane zones, utility interconnection with Duke/Dominion/Santee Cooper, obtaining Permission to Operate (PTO).
Solar 101
Fundamentals of photovoltaic technology for coastal climates, understanding monocrystalline panels for high heat/humidity performance, inverter types optimized for variable weather, system monitoring, maintenance requirements including hurricane preparation, salt air corrosion prevention for coastal installations.
Community Solar
Limited community solar availability in South Carolina, utility-specific programs, emerging opportunities as Solar Choice program launches in 2026, shared solar options for renters and multi-family residents, subscription-based solar gardens (availability varies by utility).
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Estimate your solar savings and system requirements.
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Important 2026 Updates
Net Metering Transition to Solar Choice
Dominion Energy’s Net Energy Metering 2.0 (NEM 2.0) program expired December 31, 2025. Starting January 1, 2026, customers are automatically enrolled in the Solar Choice program with different compensation structures. Installing before this transition was critical for maximizing long-term value.
Learn more: Dominion Energy Solar Choice | SC Energy Office
Utility Rate Increases Accelerate Solar Economics
Multiple South Carolina utilities filed for substantial rate increases taking effect in 2026. Duke Energy customers see average increases of $6.42/month (effective January 2026). Dominion Energy requests a 12.7% residential increase (~$20/month) starting July 2026. Rising rates improve solar payback periods and long-term ROI.
Learn more: SC Public Service Commission | Track Utility Rate Cases
South Carolina Solar Laws & Regulations
Federal Tax Credit
While the federal tax credit for homeowners installing residential solar ended at the end of 2025, tax credit for commercial installation is still available. Commercial projects beginning construction latest by July 4, 2026 still qualify for 30%.
Learn more: IRS Solar Tax Credit
South Carolina State Tax Credit
25% of total solar system costs as a state income tax credit, claimed at $3,500 maximum annually for up to 10 years (total cap $35,000). One of the strongest state-level solar incentives in the nation.
Learn more: SC DOR Tax Credits | SC Energy Office
Property Tax Exemption
Statewide property tax exemption for residential solar systems with rated capacity up to 20 kW-AC (effective 2025). Solar installations do not increase property tax assessments despite adding significant home value. Applies to both owned and leased/third-party owned systems.
Learn more: DSIRE - SC Property Tax Exemption | SC Renewable Energy