In short: In Rock Hill and Fort Mill, your utility could be the City of Rock Hill (about 12.6¢ per kWh for homes in 2024), York Electric Cooperative (about 12.7¢) or Duke Energy Carolinas (about 14¢). Each has its own solar rules and outage record, and York Electric pays EV charger rebates. Ice storms are York County’s top-rated hazard.
This page covers Rock Hill and Fort Mill, the South Carolina side of the Charlotte area, in York County. Statewide rules, the 25% state solar tax credit and contractor licensing are on our South Carolina energy guide. Being across the line from Charlotte does not put you under North Carolina’s rules: South Carolina’s utilities, permits and credits apply.
Rock Hill–Fort Mill at a glance
- City of Rock Hill: a city-owned electric utility with about 36,500 home customers. About 12.6¢ per kWh (2024 average). Outages in 2024: 90 minutes per customer on normal days, 605 minutes with major events (EIA-861).
- York Electric Cooperative: a member-owned co-op with an office in Fort Mill. About 12.7¢ per kWh; 89 minutes on normal days, 981 with major events.
- Duke Energy Carolinas: also serves York County. About 14.0¢ per kWh across its South Carolina area; 180 minutes on normal days, 7,804 minutes (about 130 hours) with major events in 2024, the year of Hurricane Helene.
- Sun: 4.54 kWh per square meter per day (NASA POWER, 2001 to 2020). Our rough estimate: about 1,325 kWh a year per kW of panels.
- Top hazards (York County): ice storms rated “very high”; cold waves, lightning, strong wind and tornadoes “relatively high” (FEMA National Risk Index, December 2025).
- Home solar already here (2024): 227 systems on Rock Hill’s utility and 1,105 on York Electric (EIA-861).
- Public charging: Rock Hill had 60 public charging ports and Fort Mill 56 (AFDC Station Locator, October 3, 2026; public Level 2 and DC fast ports).
Your utility and what it means
City of Rock Hill. As a city utility, Rock Hill sets its own rates and solar terms. To connect solar, your contractor files a solar panel permit with the city’s Planning and Development department, and you sign two agreements with the Utilities Department: a standard interconnection agreement for customer-owned renewable generation and a “tri-party net billing” power purchase agreement, which sets how exported power is credited. Read that rate before you size a system; we could not confirm the credit amount. The city also runs SmartChoice rebates and loans for efficient heating and water heating, a “Great Rate” for qualifying all-electric homes, and a Green Power option at $3 a month per 100 kWh block. We found no Rock Hill EV charger rebate.
York Electric Cooperative. The co-op has net metering rate schedules for members with solar and a community solar option: a 20-year subscription at $100 per kW up front plus $12 per kW a month, credited at 10¢ per kWh (not for members already on net metering). For EV owners it offers two paths. Let the Optiwatt app manage charging and get $250 per charger plus $15 per vehicle the first year, then up to $120 a year (or a $100 one-time credit without managed charging). Or join its time-of-use rate program, with a rebate of up to $200 when a qualifying charger and submeter are installed by a qualified electrician. York Electric also sells whole-house standby generators to members at a discount through a local installer.
Duke Energy Carolinas. Duke customers follow South Carolina’s “Solar Choice” time-of-use rules with a monthly minimum bill, explained on the state page. Duke’s PowerPair battery incentive is a North Carolina program as far as we found, so it does not apply on this side of the line.
Backup power in Rock Hill–Fort Mill
Outage records differ a lot by utility. In 2024, Rock Hill’s city utility averaged about 10 hours per customer with major events counted, York Electric about 16 hours, and Duke’s South Carolina system about 130 hours after Helene, when Duke reported about 639,000 South Carolina customer outages on September 27 (Duke Energy). On normal days all three stayed between 1.5 and 3 hours.
Here the storms that matter most are inland ones: FEMA rates York County’s ice storm risk “very high”, with tornadoes and strong wind close behind. Plan for cold-weather outages:
- Hours: a portable power station.
- A day or so: a home battery on essential circuits.
- Several days of ice: a standby or portable generator that can run heat.
See the backup power guide, the battery backup calculator, the generator sizing tool and generator installation. Safety: generators outdoors only, at least 20 feet from the house, exhaust away from openings, never in a garage (CPSC); battery-backed CO alarms on every level; a transfer switch or interlock installed by a licensed electrician.
Solar in Rock Hill–Fort Mill
About 1,325 kWh per kW a year on our rough estimate. At Rock Hill’s 12.6¢ average, each kW could be worth up to about $165 a year if every kWh replaced power you would buy; at Duke’s 14.0¢, about $185. Those are ceilings: exported power is usually credited for less, so how your utility pays for exports decides the real number. Because prices here are below the state average, the 25% state tax credit and a fair quote matter more. The federal credit ended for systems completed after 2025.
Use the solar potential calculator, compare solar cost, and read solar installation.
Home batteries in Rock Hill–Fort Mill
A battery’s main job here is backup through ice storms and summer thunderstorms, and storing solar for evening use when exports earn less. We found no battery rebate from Rock Hill, York Electric or Duke in South Carolina. See battery installation and home battery cost.
EV charging in Rock Hill–Fort Mill
Our estimate at 30 kWh per 100 miles: about $3.80 per 100 miles at Rock Hill’s or York Electric’s average price (about $450 for 12,000 miles a year), or about $4.20 on Duke (about $500). York Electric members can add a rebate and lower overnight prices through the programs above. A Level 2 charger needs a 240-volt circuit, a permit and a licensed electrician; York Electric’s time-of-use program also needs a separate submeter. See EV charger installation and the EV charging cost calculator.
Drive on another fuel? See every alternative fuel station in Rock Hill: hydrogen, propane, natural gas, E85 ethanol, biodiesel and renewable diesel.
Permits and inspections
- Rock Hill: Planning and Development’s solar panel installation and net billing page lists the permit and the two utility agreements.
- Fort Mill: the town’s Development Center publishes solar panel requirements: a building permit, electrical and site plans, equipment specifications and, for roof systems, a structural analysis sealed by a South Carolina engineer.
- Outside town and city limits: York County Building and Codes, which requires a permit for all construction.
If your neighborhood has an HOA, check the covenants for panels and generators before you sign. Check that your installer holds a South Carolina license (lookup on the state page), even if the company is based in Charlotte.
Cities we cover
- Rock Hill
- Fort Mill
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Rock Hill–Fort Mill energy FAQ
Who is my electric company in Rock Hill or Fort Mill?
It depends on your address. Federal data lists six electric providers in York County: the City of Rock Hill, York Electric Cooperative, Duke Energy Carolinas, Broad River and Fairfield electric co-ops, and Lockhart Power (EIA). Your bill shows which one serves you, and that decides your rates, solar terms and rebates.
How do I connect solar on Rock Hill’s city utility?
Your contractor applies for a solar panel permit with Rock Hill’s Planning and Development department. You then submit a standard interconnection agreement and a tri-party net billing power purchase agreement to the Utilities Department. The net billing agreement sets how exported power is credited, so ask for it before you decide on system size.
What EV rebates does York Electric offer?
Through the Optiwatt app with managed charging: $250 per charger plus $15 per vehicle the first year, then up to $120 a year, or $100 once without managed charging. Its time-of-use rate program offers up to $200 with a qualifying charger and a submeter installed by a qualified electrician. Check York Electric’s EV page for current terms.
Do North Carolina incentives apply in Fort Mill?
No. Even though Fort Mill is part of the Charlotte area, utility programs follow the state where you are served. Duke’s PowerPair battery incentive, for example, is offered in North Carolina. Fort Mill homes use South Carolina programs, such as the state’s 25% solar tax credit and their own utility’s offers.
Sources
U.S. Energy Information Administration, Form EIA-861 for 2024 (utility sales, reliability, service territories, net metering), read October 3, 2026. City of Rock Hill Utilities and Planning and Development pages. York Electric Cooperative solar, EV incentive and generator pages, read October 3, 2026. Duke Energy news release, September 27, 2024. FEMA National Risk Index (December 2025). NASA POWER climatology, 2001 to 2020. Town of Fort Mill and York County permit pages. CPSC generator safety guidance.