How much do solar panels cost in 29403?

A standard 6kW residential solar system in 29403 (Charleston, SC) costs approximately $16,920 before incentives. After the 30% federal Investment Tax Credit, the net cost is $11,844.

How much will I save with solar panels in 29403?

Homeowners in 29403 can expect to save approximately $1,310 per year on electricity bills with a 6kW solar system, for a total of around $32,750 over 25 years.

How long is the payback period for solar in 29403?

The estimated payback period for a 6kW solar installation in 29403 is 9 years after the federal tax credit. This is based on 5.34 kWh/m²/day average solar irradiance and local electricity rates of $0.14/kWh.

Solar Panel Cost in 29403

Last updated April 14, 2026 · Source: NREL and SEIA

Charleston, South Carolina · Good ROI

Payback 9 years

6kW System Cost Breakdown

Gross Installation Cost $16,920 $2.82/W installed

Federal Tax Credit (30%) −$5,076 ITC through 2032

Net Cost After Credit $11,844 Your out-of-pocket cost

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Savings & ROI for 29403

Annual Electricity Savings $1,310 At $0.14/kWh local rate

Annual Solar Production 9,354 kWh 5.34 kWh/m²/day irradiance

Break-Even Point 9 years Good ROI

25-Year Net Savings +$20,906 After total system cost

Solar Loan Calculator

Financing a 6kW solar system in Charleston? Estimate your monthly payment and total interest below.

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Assumes fixed-rate loan. Actual rates vary by lender and credit score. Solar-specific loans from Mosaic, GoodLeap, or Sunlight often offer lower rates than personal loans.

Solar Resource in Charleston

Charleston (29403) receives an average of 5.34 kWh/m²/day of solar irradiance, based on latitude 32.768°N and South Carolina regional weather patterns from NREL data. At the local electricity rate of $0.14/kWh, a 6kW system generates roughly $1,310 per year in bill savings.

Solar irradiance vs. US average (4.5 kWh/m²/day)

07.5 kWh/m²/day

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Nearby Zip Codes in Charleston

29401 Charleston, SC 9 yr payback $1,309/yr savings 29405 Charleston, SC 9 yr payback $1,309/yr savings 29407 Charleston, SC 9 yr payback $1,309/yr savings 29414 Charleston, SC 9 yr payback $1,309/yr savings

How We Calculate Solar Costs for 29403

Costs are based on the average price per watt for South Carolina ($2.82/W), applied to a standard 6kW residential system. Solar irradiance is derived from NREL PVWatts data for latitude 32.768°N, adjusted for local weather patterns. Electricity rate uses the South Carolina EIA average of $0.14/kWh.

The 30% federal Investment Tax Credit (ITC) applies as a credit against your federal income tax liability. Many states offer additional credits; check your state's energy office for local incentives.