Greenville, South Carolina
Home Battery Backup in Greenville
Helene left hundreds of thousands of Upstate homes dark for days. A battery keeps chosen circuits on, and covers the evening peak on Duke's solar time-of-use rate.
219,000 Upstate customers still out a week after Helene · R-STOU 21.48¢ on-peak · 33.86¢ critical · 9.96¢ super off-peak.
The short answer
Much of Greenville is served by Duke Energy Carolinas. A week after Hurricane Helene, Duke still had about 219,000 Upstate customers without power, which is why outage backup leads the conversation here.
If you go solar with Duke, you take its R-STOU time-of-use rate: from November 1, 2026, 21.48¢ per kWh on-peak, 9.96¢ super off-peak overnight, and up to 20 critical peak days at 33.86¢. A battery shifts solar into those peaks.
Get a Free Estimate
Tell us your Greenville address, whether you have solar and what must stay on in an outage. We confirm coverage before anyone sizes a battery.
Duke Energy outages and rates in Greenville
From Duke Energy's Helene restoration updates and its South Carolina Schedule R-STOU.
Helene in the Upstate
A week after Hurricane Helene, on October 3, 2024, Duke Energy reported about 219,000 Upstate South Carolina customers still without power, after restoring 826,000 outages across the state.
21.48¢ on-peak, 9.96¢ overnight
Duke Energy Carolinas' South Carolina Schedule R-STOU, effective November 1, 2026, bills 21.4820¢ per kWh on-peak, 13.3990¢ off-peak and 9.9581¢ super off-peak, plus a $13.09 monthly basic charge and riders.
Up to 20 critical peak days
Duke can call up to 20 critical peak days a year on R-STOU, when peak hours are billed at 33.8557¢ per kWh. Notice is given by 4 p.m. the day before.
Where a battery fits in Greenville
Storm backup, Solar Choice time-of-use, the seasonal peaks and the charges that stay.
Storm backup comes first
Helene showed how long Upstate outages can last. A battery with a critical load panel keeps refrigeration, a well or sump pump, internet and medical devices running while crews work.
Solar Choice comes with time-of-use
R-STOU is only available to customers on Duke's Residential Solar Choice rider, so going solar with Duke in South Carolina means living with an evening peak. A battery charged from solar or overnight covers it.
Two peaks a year, by season
On-peak is 6–9 p.m. on weekdays from March through November and 6–9 a.m. on weekdays from December through February. Super off-peak is midnight to 6 a.m. from March through November.
Charges a battery cannot avoid
R-STOU adds a non-bypassable charge of $0.47 per kW of solar each month and a $30 minimum customer and distribution charge. We size around them rather than promise they go away.
Greenville next to Charlotte and Raleigh
Charlotte is on the same utility, Duke Energy Carolinas, but under North Carolina's tariff: 23.5¢ on-peak and 42.8¢ on critical days, against Greenville's 21.48¢ and 33.86¢.
Raleigh is served by Duke Energy Progress, whose time-of-use rate also runs a 6–9 p.m. summer peak and up to 20 critical peak days.
Where these figures come from
Rates trace to Duke Energy Carolinas' South Carolina tariff; Helene figures to Duke's own restoration update.
- Duke Energy Carolinas — Schedule R-STOU (SC), effective November 1, 2026 — prices, hours, critical peak rules and fixed charges.
- Duke Energy — Helene restoration update, October 3, 2024 — Upstate customers still without power.
What a home battery job with us covers
Installation of storage and the backup circuits behind it, with the siting and utility paperwork handled.
Battery installation
Wall or floor-mounted storage installed to the listing and to the residential code sections that govern where it may go.
Backup and critical load panel
Deciding and wiring which circuits stay live, and which must never be on backup — the choice that defines what an outage feels like.
Integration with existing PV solar
Connecting storage to an array that is already on the roof, including whether the existing inverter supports it.
Transfer switch and disconnection
The equipment that separates the house from the grid during an outage, which is what makes backup legal as well as possible.
Siting to code
Location, clearances, separation and impact protection assessed against the adopted code before anything is mounted.
Permit, inspection and utility approval
The electrical permit, the inspection, and the utility's own approval step where storage touches the service.
This is installation work. No runtime, capacity or incentive figure is quoted before your loads and your utility are confirmed. Coverage is confirmed per service area rather than promised as blanket availability.
What the work actually looks like
A battery job is an electrical job. The panel, the circuits and the disconnection are most of it.
Battery backup in Greenville, answered plainly
Who is the electric utility in Greenville?+
Much of Greenville is served by Duke Energy Carolinas. Parts of Greenville County are served by electric cooperatives with their own rates, so check your bill.
How long were Greenville outages after Helene?+
On October 3, 2024, about a week after the storm, Duke reported some 219,000 Upstate customers still without power and targeted October 6 for the remaining 85,000 in the hardest-hit areas.
What is Duke's R-STOU rate?+
Schedule R-STOU is Duke Energy Carolinas' South Carolina time-of-use rate for customers on Rider RSC (Residential Solar Choice). From November 1, 2026 it bills 21.4820¢ per kWh on-peak, 13.3990¢ off-peak, 9.9581¢ super off-peak and 33.8557¢ during critical peak hours, plus a $13.09 monthly basic charge and riders.
What are the on-peak hours?+
6–9 p.m. on weekdays from March through November and 6–9 a.m. on weekdays from December through February. Critical peak hours can be shifted by an hour, and Duke can call up to 20 critical peak days a year with notice by 4 p.m. the day before.
Are there charges a battery won't remove?+
Yes. R-STOU includes a non-bypassable charge of $0.47 per kW per month, a $30 monthly minimum customer and distribution charge, and, for systems larger than 15 kW, a grid access fee on the capacity above 15 kW.
How long will a battery run my house?+
It depends on capacity and which circuits you put on it, so we don't quote a runtime before seeing the panel.
Who installs it, and who is responsible afterwards?+
Seamless Home is the licensed contractor of record on the work it runs. Installation is performed by vetted installing partners engaged as our subcontractors, so the permit, the inspection and any correction notice carry one name. Coverage is confirmed per service area rather than promised as blanket availability.
Related resources
Home battery backup
The national service page behind this one.
Learn more →Home battery backup in Charlotte, NC
Duke Energy Carolinas RSTC rates on the North Carolina side.
Learn more →Home battery backup in Raleigh, NC
Duke Energy Progress TOU and the Rider NMB change.
Learn more →Critical load panel planner
Pick the circuits a battery should carry.
Learn more →What is a critical load panel?
How backup circuits are chosen.
Learn more →All home services
Water, battery, HVAC and solar under one licensed contractor of record.
Learn more →Get a free battery estimate
We confirm your Greenville address is in coverage, check your panel and solar setup, and size backup circuits before anyone promises bill savings. No obligation.
Get a Free Estimate