2026 South Carolina Solar ROI & Electric Rate Breakdown by County (10 Counties)
SC Energy Freedom Act Solar Choice TOU Tariff + 25% South Carolina State Solar Tax Credit (up to $3,500/yr carryforward). 25% SC State Income Tax Credit applies to total solar + battery installation cost, making SC one of the strongest post-25D states in 2026.
| County | Primary Electric Utility | Avg Rate ($/kWh) | Peak Sun Hours | Est. Yr-1 Savings | Cash Payback | County Teardown |
|---|---|---|---|---|---|---|
| Greenville County | Duke Energy Carolinas | $0.16/kWh | 5.1 hrs/day | $2,137/yr | 11.8 yrs | View Math → |
| Richland County | Dominion Energy South Carolina | $0.16/kWh | 5.1 hrs/day | $2,247/yr | 11.7 yrs | View Math → |
| Charleston County | Dominion Energy South Carolina | $0.17/kWh | 5.2 hrs/day | $2,305/yr | 11.4 yrs | View Math → |
| Horry County | Santee Cooper / Horry Electric Co-op | $0.15/kWh | 5.2 hrs/day | $2,123/yr | 11.8 yrs | View Math → |
| Spartanburg County | Duke Energy Carolinas | $0.16/kWh | 5.1 hrs/day | $2,137/yr | 11.8 yrs | View Math → |
| Lexington County | Dominion Energy SC / Mid-Carolina Electric | $0.16/kWh | 5.1 hrs/day | $2,220/yr | 11.8 yrs | View Math → |
| York County | Duke Energy Carolinas / York Electric Cooperative / City of Rock Hill | $0.15/kWh | 5 hrs/day | $2,219/yr | 4.9 yrs | View Math → |
| Berkeley County | Dominion Energy South Carolina / Berkeley Electric Cooperative / Santee Cooper | $0.16/kWh | 5.1 hrs/day | $2,442/yr | 4.8 yrs | View Math → |
| Beaufort County | Dominion Energy South Carolina / Palmetto Electric Cooperative | $0.16/kWh | 5.2 hrs/day | $2,490/yr | 4.8 yrs | View Math → |
| Anderson County | Duke Energy Carolinas / Blue Ridge Electric Cooperative | $0.15/kWh | 5 hrs/day | $2,219/yr | 4.8 yrs | View Math → |
Recommended Home Battery & Hybrid Inverter Kits for South Carolina
Turnkey solar salespeople routinely charge $3.60–$4.80/W by bundling 30% loan dealer fees and $12,000+ battery margins. Buying Tier-1 UL9540 hardware directly—either DIY or hiring a local licensed electrician ($1,500–$2,500)—cuts total cost by 50–65%.
EG4 18kPV Inverter + 14.3kWh PowerPro WallMount
The gold-standard UL9540 all-in-one hybrid system. Pair an 18kW PV input hybrid inverter (200A pass-through) with an indoor/outdoor IP65 14.3kWh LiFePO4 WallMount battery—saving $12,000+ vs turnkey quotes.
- 18kW PV Input / 12kW Continuous AC Output (200A Pass-Through)
- 14.3kWh LiFePO4 (8,000+ cycles @ 80% DoD)
- UL9540 & UL1741-SB Certified for Permit Approval
EcoFlow Delta Pro Ultra (6kWh–30kWh Modular)
Skip the $30,000 contractor quote and 6-month utility interconnection wait. Delivers 7.2kW–21.6kW continuous 120V/240V split-phase output and 5.6kW Solar Input right out of the box—expandable up to 90kWh.
- 7,200W–21,600W 120V/240V Split-Phase Output
- 6.1kWh LFP Stackable Battery (scales to 30kWh–90kWh)
- 5,600W Solar Input — Zero Roof Permit Required for Portable PV
Renogy 48V Off-Grid & Hybrid LFP Solar Kit
Complete modular 48V architecture combining high-efficiency N-type bifacial panels, a 48V 3,500W–5,000W MPPT inverter-charger, and smart modular LiFePO4 storage at ~$1.15/W hardware cost.
- 48V High-Efficiency Bus (75% lower copper wire loss)
- Modular 48V 50Ah / 100Ah Smart LiFePO4 Battery Bank
- Complete Plug-and-Play MPPT All-in-One Controller
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