State Guide
Solar Panel Cost in South Carolina (2026)
See how much solar panels cost in South Carolina with local electricity rates, incentives, and payback estimates.
Last updated: 2026-06-09· Source label: EIA residential electricity rates, IRS federal clean energy credit, NREL/PVWatts solar assumptions
South Carolina's solar equation is shaped by one critical fact: unlike North Carolina, net metering here credits exports at the avoided-cost rate (~$0.03-0.04/kWh), not retail. This makes self-consumption and battery storage more economically important than in neighboring states. The saving grace is South Carolina's 25% state tax credit ((verify current cap at dsireusa.org)) — one of the strongest remaining state-level solar credits in the Southeast — plus Duke Energy and Dominion Energy South Carolina territory rebates. Santee Cooper, the state-owned utility serving coastal areas including Myrtle Beach and Charleston, operates under separate rules. At $0.16/kWh electricity (EIA March 2026) with 5.0 peak sun hours and $2.55/W install costs, payback ranges 6-8 years — but only if the tax credit is fully usable against your SC income tax liability.
Texas Solar Calculator
Estimates based on south-carolina state averages. Your actual cost depends on roof, equipment, installer, and financing.
Incentives & Rebates
Federal Residential Credit Caveat
For projects where IRS project-year rules support a residential credit, a 30% credit would be roughly $6,885 on a $22,950 system. For 2026+ residential projects, RenewableCalc keeps this at 0% unless current IRS guidance supports eligibility.
State and Utility Incentive Context
South Carolina: State tax credit 25% (verify current cap at dsireusa.org). Net metering at avoided cost rate. Calculator default local value: verify current program amounts at dsireusa.org before any federal residential credit. Verify current program funding, utility territory, DSIRE listings, and tax eligibility before relying on this incentive in a quote.
Net Metering
South Carolina solar exports are modeled as Net metering at avoided cost rate. Confirm the current utility tariff, retail-credit or avoided-cost treatment, monthly rollover, and annual true-up before sizing a system around exported kWh.
Top Electric Utilities
- 1. Duke Energy
- 2. Dominion Energy South Carolina
- 3. Santee Cooper
Source: EIA-861, by customer count
Recommended next steps
Calculate your ROI
Use Solar Panel Cost in South Carolina (2026) defaults with pre-filled state data.
Review an installer quote
Validate price per watt, system size, and financing terms.
Compare ownership models
Buy vs Lease vs PPA — see which fits your situation.
Refine your estimate
Use the Solar ROI Calculator with your South Carolina utility rate, annual kWh usage, and quote assumptions.
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Show my solar path →Overview
South Carolina's solar equation is shaped by one critical fact: unlike North Carolina, net metering here credits exports at the avoided-cost rate (~$0.03-0.04/kWh), not retail. This makes self-consumption and battery storage more economically important than in neighboring states. The saving grace is South Carolina's 25% state tax credit ((verify current cap at dsireusa.org)) — one of the strongest remaining state-level solar credits in the Southeast — plus Duke Energy and Dominion Energy South Carolina territory rebates. Santee Cooper, the state-owned utility serving coastal areas including Myrtle Beach and Charleston, operates under separate rules. At $0.16/kWh electricity (EIA March 2026) with 5.0 peak sun hours and $2.55/W install costs, payback ranges 6-8 years — but only if the tax credit is fully usable against your SC income tax liability.
Use this result
Use the calculator inputs first, then compare the result against local rates, incentives, roof conditions, and utility export rules.
Method, assumptions, and sourcesOpen this section when you want to audit the calculation behind the estimate.ShowHide
Calculation Method
South Carolina solar payback = net installed cost after incentives / annual avoided electricity cost plus export credits
Key Assumptions
- Policy last reviewed: 2026-06-09. Federal residential credit assumptions are project-year dependent and not applied by default for 2026+ projects.
- Residential rate and installed-cost figures are planning benchmarks, not a final utility bill audit or installer quote.
- The model assumes a roof with usable sun exposure; shading, roof age, electrical upgrades, permitting, and financing can materially change cost.
- South Carolina economics should be checked against strong sun and cooling load, utility-specific solar rider rules, and coastal storm considerations.
- The federal tax credit only helps households with sufficient tax liability and qualifying project documentation.
Data Sources
Electricity rates
EIA Electric Power Monthly
Residential electricity-rate benchmark used for avoided-bill savings.
Solar production
NREL PVWatts
Solar production assumptions should be checked against local roof orientation, shading, and climate.
Federal incentive
IRS Residential Clean Energy Credit
Supports 2026 Section 25D expiration (residential ITC no longer available by default) for qualifying residential solar costs.
State and utility policy
DSIRE and local utility tariff pages
Used as a reminder to verify state incentives, net-metering, export-credit, and rebate rules before relying on an estimate.
Result Summary
Net cost before federal residential credit
~$20,950
Uses South Carolina's $2.55/W installed-cost default and $2,000 state/local incentive default; no 2026+ federal residential credit is applied by default.
Estimated payback
6-8 years
Depends on actual utility rate, Net metering at avoided cost rate, installed cost, roof production, financing, and incentive eligibility.
Annual bill offset
$1,500-$2,050/yr
Estimate based on a 9.0 kW system, 5.0 peak sun hours/day, $0.14/kWh, and PVWatts-style production before fixed charges or export-credit adjustments.
Formula Assumptions Data Sources FAQ Related Links
Compare Solar Costs With Neighboring States
Solar economics vary by state. Compare South Carolina with nearby states to see how electricity rates, incentives, and payback periods differ in your region.