Which utility serves a charging site in South Carolina?

Greenville and Spartanburg are Duke Energy Carolinas; Florence and Sumter are Duke Energy Progress; Columbia and Charleston are Dominion Energy South Carolina. The model resolves the territory from the address and auto-selects the matching filed rate. Santee Cooper's coastal retail area and the state's roughly twenty distribution cooperatives are stated as uncovered rather than approximated.

Does South Carolina tax EV charging per kilowatt-hour?

No. A bill proposing a 4.5¢-per-kWh tax on public charging was recommitted to committee in April 2026, and the road-funding bill that did pass carries no kWh tax. The 6% state sales tax on commercial electricity is already inside the modeled utility rates; counties can add local-option sales tax on top, which the model discloses rather than folds.

How heavy is South Carolina's property tax on charging equipment?

Business personal property assesses at 10.5% of net depreciated value — one of the highest assessment ratios in the country — times local millage. That works out to roughly 3.4% of value per year in Greenville, about 3.1% in Charleston, and over 5% in Columbia, declining with depreciation to a permanent floor at 10% of cost. The rate field is editable per district.

ForgeAsset / Supercharger ROI / South Carolina

Tesla Supercharger ROI in South Carolina

South Carolina splits into three utility books with three different economics: Duke Energy Carolinas in the Greenville–Spartanburg upstate bills cheap demand against pricier energy, Duke Energy Progress in the Pee Dee inverts that with cheap energy against a heavy demand charge, and Dominion Energy around Columbia and Charleston files a genuine time-of-use rate whose demand charge rides a 5–9 p.m. every-day window. The tax stack pairs the covered set's cheapest entity costs — a South Carolina LLC files no annual report at all — with one of its heaviest business-personal-property assessments.

Model a South Carolina site

What makes South Carolina economics distinct

The Duke split, repeated south of the border

The two Duke books file the same shape split as their North Carolina siblings: Carolinas at about 9¢ energy and $5.14 per kilowatt of demand, Progress at about 6.1¢ energy and $15.48 per kilowatt. Which side of the split a site lands on is a location fact — the model resolves the territory from the address and prices the matching book.

A Dominion TOU rate with a big fixed floor

Dominion's Rate 24 prices three real time windows — about 10.6¢ on-peak, 5.7¢ off-peak, and 4.4¢ in the 1–5 a.m. overnight window — with a demand charge on a 5–9 p.m. daily window that coincides with a charging site's peak. The schedule also carries $3,600 per month of fixed charges and a five-year minimum contract term, both stated in the model's tariff note rather than silently ignored.

Zero entity fees, heavy property tax

A South Carolina LLC pays the state nothing annually — no report, no fee — the cheapest entity stack in the covered set. The other side of the ledger: business personal property assesses at 10.5% of depreciated value times local millage, about 3.4% of value per year in Greenville and over 5% in Columbia, among the heaviest such folds researched. Both fields are editable per district.

A charging tax that died in committee

A proposed 4.5¢-per-kWh tax on public charging was recommitted to committee in April 2026 and the session's road-funding bill was enacted without it — South Carolina currently levies no per-kWh charging tax. The 6% electricity sales tax is already folded into all three modeled utility rates. A Duke Progress annual-review increase of about 6.2% takes effect August 2026, and the library re-derives that row at the date.

Utilities and tariffs modeled in South Carolina

Utility & tariff	Energy	Demand
Duke Energy Carolinas SC LGS	9.0¢/kWh flat	$5.14/kW of monthly peak
Duke Energy Progress SC LGS	6.1¢/kWh flat	$15.48/kW of monthly peak
Dominion Energy SC Rate 24	4.4¢/kWh–10.6¢/kWh by time of day	$19.90/kW of monthly peak

Rates are digit-verified against each utility's own filed sheets and update within two weeks of any revision. Full derivations are on the methodology page.

South Carolina tax profile

Sales tax on hardware: 6%
Business personal property tax: 3.4% of equipment value (example rate)
Clean-fuels credit: no program
Per-kWh charging excise: none

South Carolina tax defaults applied: no clean-fuels credit program exists in South Carolina (the LCFS revenue line is $0) — a proposed 4.5¢/kWh charging tax died in committee and the session's road-funding bill was enacted without it. LLC costs are $0 — South Carolina requires no annual report or fee from a non-corporate LLC; municipal business-license taxes on gross receipts vary by city and are not modeled. Sales tax uses the 6% state rate on hardware, with counties adding up to about 3% of local-option tax and separately stated installation labor untaxed; the electricity sales tax is already inside the modeled utility rates. Business personal property assesses at 10.5% of depreciated value times local millage — about 3.4% of value per year in Greenville, higher in Columbia and lower in Charleston, with a permanent floor at 10% of cost — the field is editable by district.

South Carolina programs and incentives

NEVI (federal, SCDOT-administered)

Roughly $70 million over five years for corridor DC fast charging along I-95, I-26, I-85, and I-77; a request-for-proposals round was anticipated in 2026 after the 2025 federal pause lifted.

Dominion Energy SC commercial EV rebates

Program materials describe rebates for commercial DCFC stations and make-ready costs on a first-come basis; current terms vary by program cycle — a specific award enters the model through the grant inputs.

South Carolina charging market

South Carolina carries roughly 46 Supercharger stations along I-95, I-26, I-85, and I-77. Duke Energy Carolinas serves the Greenville–Spartanburg upstate, Duke Energy Progress the Florence–Sumter Pee Dee, and Dominion the Columbia and Charleston metros. The Myrtle Beach coastal corridor is largely Santee Cooper and electric-cooperative territory, which the model does not cover; addresses there see a named-utility notice rather than a wrong auto-selection.

South Carolina Supercharger ROI — questions

Which utility serves a charging site in South Carolina?: Greenville and Spartanburg are Duke Energy Carolinas; Florence and Sumter are Duke Energy Progress; Columbia and Charleston are Dominion Energy South Carolina. The model resolves the territory from the address and auto-selects the matching filed rate. Santee Cooper's coastal retail area and the state's roughly twenty distribution cooperatives are stated as uncovered rather than approximated.
Does South Carolina tax EV charging per kilowatt-hour?: No. A bill proposing a 4.5¢-per-kWh tax on public charging was recommitted to committee in April 2026, and the road-funding bill that did pass carries no kWh tax. The 6% state sales tax on commercial electricity is already inside the modeled utility rates; counties can add local-option sales tax on top, which the model discloses rather than folds.
How heavy is South Carolina's property tax on charging equipment?: Business personal property assesses at 10.5% of net depreciated value — one of the highest assessment ratios in the country — times local millage. That works out to roughly 3.4% of value per year in Greenville, about 3.1% in Charleston, and over 5% in Columbia, declining with depreciation to a permanent floor at 10% of cost. The rate field is editable per district.

Sources

Model a Tesla V4 Supercharger site in South Carolina — payback, NPV, IRR, and a 15-year cash flow from your own inputs.

Run a South Carolina scenario

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ForgeAsset is software, not investment, tax, or legal advice — outputs are model estimates from your inputs, not guarantees. Rates and programs current as of research; verify current terms with each source before committing capital.