Dominion Energy South Carolina Rate Selection Guide
Dominion Energy South Carolina (DESC), formerly SCE&G, is a regulated investor-owned utility delivering electricity to roughly 806,000 customers and natural gas to about 170,000 across central and coastal South Carolina. Business customers can access 30-minute interval data and the MV-WEB interval analytics portal, with EDI (ANSI X12 810) for automated billing. There is no Green Button or public developer API.
Dominion Energy South Carolina Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Rate 9 - General Service | commercial | Facilities charge + per-kWh energy (demand above thresholds); see tariff | Small to mid-size commercial sites |
| Rate 24 - Large General Service (TOU) | commercial | Per-kW demand + on/off-peak per-kWh; see tariff | Large commercial loads that can shift to off-peak |
| Rate 23 - Industrial Power Service | industrial | Per-kW demand + per-kWh energy; DSM opt-out eligible; see tariff | Manufacturing / industrial with high, steady demand |
| Rate 27 - Large Power Service | industrial | Per-kW demand + per-kWh energy; see tariff | Large, high-load-factor industrial facilities |
Market Overview
South Carolina is a fully regulated electricity market. DESC is the sole provider of bundled generation, transmission and distribution service in its territory, with rates set by the South Carolina Public Service Commission. There is no retail electric competition, no supplier choice for any customer class, and no community choice aggregation. Large industrial customers do not have a retail shopping option, though they may participate in DESC's industrial and interruptible rate schedules and economic-development riders.
Need to pull your actual usage data to compare rates? See the Dominion Energy South Carolina Data Access Guide →
Current Rate Schedules
DESC non-residential electric service is organized into demand-metered commercial and industrial schedules set by the South Carolina PSC. Small commercial loads take General Service (Rate 9); larger loads take Large General Service time-of-use (Rate 24), Industrial Power Service (Rate 23) and Large Power Service. Demand-metered schedules bill a per-kW demand charge plus per-kWh energy, with fuel and rider components layered on. Specific dollar figures change with each PSC proceeding; consult the tariff book for current values. DESC filed a rate review in January 2026 and reached a May 2026 settlement for an overall increase near 7.6% (down from ~12.7% requested), with new rates expected mid-2026 pending PSC approval.
Effective: May 11, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Rate 9 - General Service | commercial | Small and medium commercial customers not qualifying for large-load schedules. | Monthly basic facilities charge plus per-kWh energy charge; demand charges apply above defined kW thresholds. Fuel and riders additional. See tariff for current rates. | — |
| Rate 24 - Large General Service (Time-of-Use) | commercial | Large general-service commercial customers with significant demand, billed on a time-of-use basis. | Demand-metered: per-kW demand charge plus on-/off-peak per-kWh energy charges, with fuel and riders. See tariff for current rates. | — |
| Rate 23 - Industrial Power Service | industrial | Industrial customers; eligibility tied to demand and SIC/NAICS classification (e.g., 1,000 kW interruptible threshold for certain programs). | Demand-metered industrial schedule: per-kW demand plus per-kWh energy; DSM opt-out available for qualifying loads (>=1,000,000 kWh/yr). Fuel and riders additional. See tariff for current rates. | — |
| Rate 27 - Large Power Service | industrial | Large power / high-load-factor industrial customers. | Demand-metered with per-kW demand and per-kWh energy components plus fuel and riders. See tariff for current rates. | — |
Rate Recommendations by Use Case
Mid-size commercial office or retail
Smaller commercial sites generally take General Service (Rate 9). Monitor whether demand crosses thresholds that trigger demand billing.
Rate 9 fits loads below the large-general-service thresholds; demand charges only apply once kW thresholds are exceeded.
- Pull 30-minute usage to confirm peak kW
- Watch for crossing demand thresholds as load grows
Large commercial with flexible operations
Large commercial customers that can shift load should evaluate Rate 24 time-of-use to reduce energy charges during off-peak hours.
TOU pricing rewards moving discretionary load off-peak; demand management still governs the demand component.
- Use MV-WEB to model on/off-peak split
- Target HVAC and process loads for shifting
Manufacturing / industrial facility
Industrial sites should evaluate Rate 23 Industrial Power Service or Rate 27 Large Power Service and pursue DSM opt-out where eligible.
Industrial schedules match high, steady demand and offer DSM cost opt-out for qualifying loads.
- Confirm SIC/NAICS and demand eligibility
- File for DSM opt-out if >=1,000,000 kWh/yr
- Manage coincident peak with interval data
Multi-site portfolio benchmarking
Portfolios should centralize interval data via MV-WEB and EDI to benchmark demand and load factor across sites.
MV-WEB multi-meter aggregation plus EDI 810 billing enables consistent cross-site cost analysis.
- Request MV-WEB access for all sites
- Enroll high-volume accounts in EDI
- Normalize by load factor for fair comparison
Historical Rate Trends
DESC rates are adjusted through periodic SC PSC base-rate cases and fuel proceedings. The most significant recent change is the 2026 base-rate review.
May 11, 2026
Settlement in DESC's 2026 electric rate review set an overall increase near 7.6% (down from the ~12.7% originally requested), with allowed ROE lowered to 9.9% from 10.5%; ~$207M additional annual revenue. New rates expected mid-2026 pending PSC approval. As-filed C&I impacts were roughly 5.9% (commercial) and 14.9% (industrial).
+7.6%Overall trend: Rising; ROE and fuel pressures have driven recent increase requests.
Next expected change: New base rates expected mid-2026 pending final SC PSC approval of the May 2026 settlement.
Cost Optimization Strategies
Because DESC C&I bills are demand-driven, the biggest levers are reducing coincident peak demand, improving load factor, and shifting load off-peak on time-of-use schedules.
Peak demand management
For: Demand-metered commercial and industrial (Rate 9 above thresholds, 23, 24, 27)
Use MV-WEB 15-minute load profiles to identify and shave monthly peak kW, which directly lowers demand charges.
Time-of-use load shifting
For: Large general service customers on Rate 24
On Rate 24, shift discretionary load to off-peak periods to lower energy charges.
DSM cost opt-out
For: Large industrial customers
Qualifying industrial customers (Rate 23, or >=1,000,000 kWh/yr with eligible classification) may opt out of DSM program costs.
To implement these strategies, you need your 15-minute interval data. Learn how to download Dominion Energy South Carolina interval data →
Frequently Asked Questions
How can a business get 15-minute interval data from DESC?▾
Commercial and industrial customers with interval meters use MV-WEB at https://mvweb.dominionenergyse.com/. Request access through Large Business Services at 866-913-9762. MV-WEB supports 15-minute, hourly, daily, weekly and monthly load profiles with CSV export and scheduled reports.
Does DESC support Green Button or a public API?▾
No. DESC does not offer Green Button Download My Data, Connect My Data, or a public developer API. Interval data is exported as CSV from the Detailed Energy Usage portal (residential) or MV-WEB (C&I), and automated billing uses EDI.
How does a consultant or aggregator access a customer's DESC data?▾
The customer completes the DESC Third-Party Letter of Authorization specifying data types and duration, submits it to EDISCegbilling@DominionEnergy.com, and DESC issues MV-WEB credentials for the authorized account(s). For ongoing billing automation, EDI enrollment is the primary route.
What C&I rate schedules does DESC offer?▾
DESC's main non-residential electric schedules include Rate 9 (General Service / small commercial), Rate 24 (Large General Service, time-of-use) and Rate 23 (Industrial Power Service), plus Large Power Service options. Larger schedules are demand-metered (billed on kW demand plus kWh energy). Exact rates are set by the SC PSC; see the tariff book for current figures.
How do DESC business rates change?▾
Rates are set by the South Carolina Public Service Commission through base-rate cases and fuel-cost proceedings. In January 2026 DESC filed a rate review; a May 2026 settlement set an overall increase near 7.6% (lower than the ~12.7% initially requested), with new rates expected mid-2026 pending PSC approval. Always confirm current rates in the DESC tariff book.
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