Solar Panel Cost in South Carolina (2026)

Our estimates are 80–90% accurate compared to real installer quotes. On a typical $25,000 system, that means your estimate is within $2,500–$5,000 of what an installer would actually propose — close enough to know whether solar makes financial sense and to spot an overpriced quote. We use real irradiance data from the NREL PVWatts API for your exact ZIP code, EIA electricity rates by state, and a current market installation rate of $2.80/watt all-in. For a final price, you'll still need a site visit from a certified installer.

The average US homeowner saves roughly $1,300–$1,800 in the first year with solar on a typical system sized to a $150/month bill. Because utility rates tend to rise over time (our calculator assumes 4%/year), those savings compound — over 30 years that adds up to roughly $74,000–$101,000. The exact amount depends heavily on your state's electricity rate, sunlight hours, and system size.

The Investment Tax Credit (ITC) lets you deduct 30% of your total solar installation cost from your federal income taxes. For a $20,000 system, you'd get a $6,000 tax credit, reducing your net cost to $14,000. This applies to systems installed through 2032. The credit is claimed when you file your taxes — it's not an instant discount at purchase.

Payback period varies widely by state — from as fast as 5–6 years in high-electricity-rate states like California and Hawaii, up to 12–14 years in low-rate states like Washington. Most homeowners fall somewhere around 7–10 years. After payback, all solar production is essentially free electricity.

Most grid-tied solar systems don't require a battery. Without one, your home uses solar during the day and draws from the grid at night. A Tesla Powerwall adds $11,500 to your system cost (two Powerwalls: $23,000) for backup power during outages and higher self-consumption — see our battery cost breakdown for details.