Myrtle Beach, SC
Solar Battery Storage in Myrtle Beach, SC
What a battery does on a Santee Cooper bill, how to size one, and when it is not worth it.
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Why Myrtle Beach homeowners add batteries
Three local reasons, in the order most bills feel them. Demand: RG-25’s demand charge applies every month, set by your highest 60-minute demand in the season’s peak window.
Low export credit: DG-25 pays 4.15¢ for exports, roughly half of RG-25’s 7.92¢ base energy charge before the fuel and other adjustments.
Storms: hurricane season and summer thunderstorms bring outages, and a coastal second home with a freezer or a sump pump left running needs power when nobody is there.
How a battery changes a Santee Cooper bill: example arithmetic
Both inputs are examples, not estimates for your home. Your Santee Cooper interval data shows your actual peak-hour demand.
| Battery job | Example input | RG-25 / DG-25 rate | Yearly effect |
|---|---|---|---|
| Cut the monthly peak-hour demand | 3 kW lower every month | $8.00/kW-month | $288 |
| Shift surplus from export to evening use | 5 kWh a day | 7.92¢ base energy minus 4.15¢ export credit | $69 plus the fuel adjustment on those kWh |
| Backup in an outage | — | Not billed | Value depends on what you need to keep running |
HyreSolar arithmetic on Santee Cooper RG-25 and DG-25, retrieved 5 October 2026. The base energy charge excludes adjustments, so the shifted-energy line is a floor.
Time-of-use in Myrtle Beach: RT-25
Santee Cooper also offers a residential time-of-use schedule, RT-25, with the same $20.00 customer charge, no demand charge, on-peak energy at 33.80¢/kWh in the same 3–6 p.m. summer and 6–9 a.m. winter windows, and off-peak energy at 7.92¢. On that structure a battery that covers the three on-peak hours would be very valuable.
We could not confirm whether a solar customer on the DG-25 rider can take RT-25. DG-25 says it applies to customers on a demand-based rate, which RG-25 is. Ask Santee Cooper before any installer models RT-25 savings for a solar-plus-battery system.
Sizing a battery for a Myrtle Beach home
For demand shaving, size the battery’s power rating (kW) and three hours of energy (kWh) to the gap between your typical peak-window load and the level you want to hold.
For backup, size to the circuits you would keep on: refrigerator, lights, internet, a well or sump pump, perhaps one air-conditioning zone. A whole-home system that runs central air through a July outage needs far more capacity than a critical-loads panel. Battery sizing tool and critical-load panels.
Outage protection on the Grand Strand
NOAA’s Storm Events Database counted an average of 12.18 thunderstorm and high-wind events a year in Horry County from 2015 to 2025, with gusts to 65 knots, 20 tornadoes and $29.3 million in reported property damage.
Santee Cooper’s program manual is explicit that solar without battery backup must shut down until the grid is restored, to protect line workers. With a battery and the right transfer equipment, the panels can keep recharging it during a multi-day outage.
Placement matters in a flood zone. The City of Myrtle Beach requires a home’s first floor to be three feet above the base flood elevation in its AE and VE zones; a battery on the garage floor below that line is exposed to the same water.
Solar plus battery vs solar alone in Myrtle Beach
Solar alone
Cheaper and rebate-eligible up to 6 kW. Works best if the house uses power during the day: someone home, a pool pump, laundry run at midday. Surplus exports at 4.15¢. Shuts down in an outage.
Solar plus battery
Adds demand-charge savings and evening self-use, plus backup. The battery earns no Santee Cooper rebate, so it needs a large enough peak-hour gap or a strong backup need to pay its way.
Battery cost, lifespan and warranty for a Myrtle Beach install
We do not publish battery prices for Myrtle Beach until we have sourced local quotes.
When comparing, ask for the usable kWh, the continuous kW rating, the warranty’s years and its throughput or end-of-warranty capacity terms, and whether the warranty requires the unit to stay in a temperature range a Myrtle Beach garage exceeds in July.
Battery chemistry differences are on home battery chemistry; costs and the solar-side fees on Myrtle Beach solar cost.
Installation runs through the same City permits as the panels, and the City’s electrical checklist asks for the battery disconnect and its overcurrent protection on the line diagram. Details on solar panel installation in Myrtle Beach.
Battery incentives and financing in Myrtle Beach
Santee Cooper’s Solar Home rebate covers the solar portion only, based on its AC rating.
Whether a battery qualifies for South Carolina’s 25% solar credit is not settled in anything we verified, so treat it as unconfirmed and ask a tax adviser.
The federal residential credit ended for property placed in service after 31 December 2025. Financing a battery is covered on Myrtle Beach solar financing.
Who in Myrtle Beach should consider a battery, and who may not need one
Your 3–6 p.m. summer demand is high and spiky, so the $8.00/kW charge is large.
Backup keeps refrigeration and security running when nobody is there to react to an outage.
Backup has value beyond the bill.
Probably not: the demand charge is already low and the battery would have little to shave.
Fix the placement first or skip it.
Statewide comparison: South Carolina solar battery storage. Back to solar in Myrtle Beach.
Questions
Is a solar battery worth it in Myrtle Beach?
Does the Santee Cooper rebate cover batteries?
Will my solar panels work during a power outage in Myrtle Beach?
What are Santee Cooper’s peak hours?
Can I use a battery with Santee Cooper’s time-of-use rate?
Where should a battery go in a Myrtle Beach flood zone?
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