Each South Carolinautility has a different cohort and pitch. Pick the customer's utility to open its rep guide.
Dominion Energy SC · 24 SC counties · Midlands to Lowcountry
Solar Choice TOU since 2021. Pre-5/16/2019 (NEM 1.0) cohort moved to Solar Choice TOU on 1/1/2026; 5/17/2019–5/31/2021 (NEM 2.0) cohort still on full retail 1:1 through 5/31/2029 per DESC Third NEM Rider (Order 2026-248). May 2026 rate settlement: 7.6% increase ($12/mo on average bill) effective July 2026. Hurricane Helene 2024 was DESC's largest restoration in company history.
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Duke Energy Carolinas SC · 18 Upstate counties (Greenville, Spartanburg, Anderson, York)
Schedule R-STOU (Solar Time-of-Use), eff Aug 1 2024 (PSCSC 2023-388-E). Basic Customer Charge $13.09/mo + $30 formal monthly minimum bill. Excess generation credits ~2.6–4¢/kWh vs ~14¢/kWh retail (~18–30% of retail). Cumulative ~$24/mo of rate increases stacked Aug 2024 → Aug 2026. Critical Peak Pricing up to 20 days/yr, 6–9pm M–F, day-ahead notice by 4pm.
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Duke Energy Progress SC · Pee Dee + NE SC (Sumter, Florence, Darlington)
Schedule R-STOU-69 (Solar Time-of-Use), eff Jan 1 2022 (PSCSC 2021-243-E). Basic Facilities Charge $14.63/mo + $30 formal monthly minimum bill. Same export-credit + Critical Peak structure as Duke Carolinas. Feb 2026 8% rate increase (~$11/mo). Helene 2024 hit DEP territory directly.
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Santee Cooper · Berkeley, Georgetown, Horry counties (state-owned, ~220K direct retail)
State-owned, governed by its own Board (not PSC-regulated). DEFAULT residential schedule is RG-25 (three-part rate, eff Apr 1 2025): $20/mo customer charge + $8.00/kW demand charge (max 60-min interval during Peak Demand Hours: 3-6pm Apr-Oct or 6-9am Nov-Mar) + energy charge $0.0792/kWh. RT-25 (TOU energy-only, $20 customer charge + $0.3380/$0.0792 on/off-peak) is voluntary opt-in. Sub-retail export credit $0.0415/kWh flat (DG-25 Rider §4(A)(2), eff 4/1/2025; ≈ 52% of retail energy). Hourly netting per DG-25 §3(A). $5B Canadys gas plant. 2027/2028 increases proposed (4.7%/4.6% — Board vote Oct 30, 2026).
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Aiken Electric Cooperative + 19 other SC distribution co-ops (~50% of SC by area, member-owned)
Aiken Electric Cooperative R-TOU schedule (eff Jan 1 2025): $1.35/day service charge (~$41/mo) + on-peak 24¢ summer / 20¢ winter, off-peak 6¢. Solar exports under Schedule DER Rider credited at 'Value of Renewable Generation' (avoided cost, well below retail). Aiken: 16.24¢/kWh average rate, $183.77 avg bill, 113-min average outage. Other SC co-ops have different mechanics — verify customer's specific co-op before quoting.
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