Battery & backup · Lexington, SC
Solar battery installation in Lexington, SC
Why this changed in 2026 · as of July 2026
In Lexington, Dominion Energy South Carolina credits exported solar at roughly 2.8–4.1¢ per kWh while retail power costs about 14.4¢ per kWh. That means a kilowatt-hour you store and use yourself is worth roughly three to five times one you export. Storage in Lexington is now an economic decision as much as an outage-protection one.
Local storage case
Why storage does or does not fit in Lexington
Around Lake Murray the storage case is unusually easy to model, because the loads are so visible. Pool pumps run through the middle of the day, air conditioning runs hard through a Midlands afternoon, and both coincide with peak production. A household with that pattern may already consume most of what it generates, which reduces what a battery adds and is worth establishing honestly before quoting one.
Where the gap does exist, it is usually in the evening, and that is what storage is for: shifting midday production into the hours after sunset when the pump is off, the house is occupied and the retail rate applies. Whether Mid-Carolina Electric Cooperative or Dominion Energy South Carolina serves the meter changes the export rate and therefore the size of the prize, so the account needs confirming first.
On resilience, lakeside properties frequently have well pumps, irrigation and sometimes boat-lift equipment, none of which behaves like a lighting circuit when it starts. Sizing has to account for the largest starting load rather than the average draw, and where a property has several such loads the honest answer may be to back up a defined subset rather than all of them.
Written for Lexington specifically. Your own roof, bill and meter still decide the answer, which is what the free assessment settles.
The maths changed
Storing a kilowatt-hour now beats exporting one
Until the end of 2025, Dominion Energy South Carolina credited exported solar close to one-for-one. Sending surplus power to the grid was almost as good as using it, so a battery in Lexington was mostly about riding out storm-season outages.
That ended on December 31, 2025. Under Solar Choice, exports credit at roughly 2.8–4.1¢ per kWh on a time-of-use basis, with a rider of about $14 a month and a November true-up at avoided cost. You still buy power at about 14.4¢ per kWh. The gap between those two numbers is the entire case for storage.
A battery closes that gap. Instead of exporting afternoon surplus for a few cents and buying evening power back at full retail, you store the surplus and spend it yourself. For a household that is out during the day and home in the evening, this is the difference between a system that barely moves the bill and one that does what you expected.
We are not going to promise you a figure for that, because it depends on your usage shape and your rate. What we will do at the assessment is model your actual load profile against your actual rate and show you whether storage earns its cost at your address.
See the full rate picture on Lexington solar incentives, and how self-consumption drives payback on Lexington solar cost.
We handle everything
From critical-load mapping to switched-on
- 01
Critical-load mapping, not box-selling
We start from what you actually need running in an outage and what your Solar Choice rate structure rewards. Backing up essentials well beats undersizing a whole-house dream, and it costs less.
- 02
Permits, Dominion Energy South Carolina interconnection and HOA
Lexington County requires a separate electrical permit for storage on top of the solar permits. We pull all of it, file the interconnection, and prepare the architectural-review packet where a board or HOA is involved.
- 03
Installation and critical-loads panel
Our crews install the battery and tie it to a critical-loads subpanel with automatic switchover, so backup engages the moment the grid drops. No manual steps, no extension cords.
- 04
Commissioning and monitoring
We commission the system, walk you through the app so you can see state of charge and what is protected, and stay reachable long after activation.
Every battery install carries our lifetime full-system and roof-penetration warranty, on top of the manufacturer's battery warranty.
Honest numbers
What drives battery cost in Lexington
There is no honest fixed price for a battery. These are the real drivers, and a free assessment turns them into a figure for your home.
Usable capacity
How many kilowatt-hours you want available, and whether you stack more than one unit. This is the largest single factor.
Electrical work
Adding a critical-loads subpanel, and any service-panel upgrade your home needs first. Common on older Lexington properties.
Retrofit or new build
Pairing storage with a new system is cleaner than retrofitting to an existing inverter that was never specified for it.
Lexington specifics
What storage involves here
Lexington has its own constraints. Getting these right is most of the job.
- 01
A separate electrical permit
Lexington County requires one for storage on top of the solar permits, with its own inspection. We pull it and meet it.
- 02
Your outage profile
Midlands summer cooling load is heavy and aligns well with peak production. Pool pumps are common around the lake and are an excellent daytime load to shift onto solar.
- 03
Where the battery goes
Placement matters mostly for heat. Batteries dislike an unconditioned attic or a west-facing wall in a Midlands summer, so garage-interior siting is usually right.
- 04
Service panel capacity
Older services often need attention before storage can be added cleanly. We run the load calculation before quoting, not after.
- 05
Battery or generator?
For very long outages a standby generator can be the better answer, and we will say so if it is. Compare the two.
- 06
Retrofit or new build
Pairing storage with a new system is cleaner than retrofitting to an inverter that was never specified for it. We check yours first.
Lexington battery FAQ
Battery questions from Lexington homeowners
Is a home battery worth it in Lexington in 2026?
The economics improved when net metering changed. Dominion Energy South Carolina credits exported power at roughly 2.8–4.1¢ per kWh while you buy power at about 14.4¢ per kWh, so a kilowatt-hour you store and use yourself is worth roughly three to five times one you export. That is a stronger case than under the old one-for-one net metering, on top of the outage protection.
How long will a battery run my house during a Lexington outage?
It depends on usable capacity and what you back up. Most homeowners back up essentials — refrigerator, lights, Wi-Fi, well pump, medical equipment, a few outlets — which stretches runtime far longer than trying to run central air. During your assessment we map your critical loads so you know realistically what to expect rather than a marketing number.
Can I add a battery to solar I already have in Lexington?
Usually yes. Many existing systems can be retrofitted with a battery and a critical-loads panel. We check your current inverter, panel capacity and interconnection status first, and tell you honestly whether it is a clean add-on or needs additional equipment.
Do I need solar to get a battery?
No. A battery can be installed on its own to back up your home from the grid, though pairing it with solar lets you recharge from your own panels instead of only from the utility. We will walk through both options based on your goals.
Does battery storage need a separate permit in Lexington County?
Yes. Battery storage requires an additional electrical permit alongside the permits for the solar system itself in Lexington County, and the installation must satisfy the National Electrical Code as adopted in South Carolina. We pull the permits and handle the inspection sequence as part of the project.
Does a battery qualify for South Carolina's 25% tax credit?
Battery storage paired with solar may qualify for South Carolina's 25% credit, subject to the $3,500 annual cap and the same eligibility rules as the rest of the system. The expired federal credit no longer applies. Confirm your own position with a tax professional.
Nearby
Battery storage near Lexington
Keep reading
Battery storage guides
- Battery Storage
What Size Solar Battery Do I Need? A South Carolina Guide
Size a home solar battery from critical loads, continuous and surge power, usable energy, outage duration, reserve, and realistic solar recharge.
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Install Solar and Battery Together or Add Storage Later?
Choose solar-only, battery-ready solar, or integrated solar-plus-storage using outage goals, architecture, site work, approvals, and commissioning.
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Whole-Home vs Partial-Home Battery Backup
Compare whole-home and partial-home battery backup by panel design, load controls, HVAC and well needs, outage behavior, and installed scope.
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AC-Coupled vs DC-Coupled Solar Batteries
Compare AC-coupled vs DC-coupled solar batteries for retrofits, new systems, backup behavior, compatibility, expansion, and quote scope in South Carolina.
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Can You Add a Battery to Existing Solar in South Carolina?
Learn when existing solar can accept a battery in South Carolina, how coupling and inverter limits affect backup, and what to verify before upgrading.
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The Home Battery Installation Process in South Carolina
Follow a South Carolina home-battery project from outage brief and site review through design, approvals, installation, commissioning, and handoff.
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Free, no-pressure assessment
See whether storage earns its cost at your Lexington address
We will map your critical loads, model your usage against your actual rate, and tell you honestly whether a battery pays for itself here or whether it is purely backup insurance.
Mon–Sat, 10am–6:30pm ET · We typically follow up within the hour.