South Carolina
Solar in Columbia, SC: Costs, Savings, Incentives & Local Options
What Dominion pays for exports, what the Development Center asks for, and what is still claimable, for homes in the City of Columbia.
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Columbia solar at a glance
| Factor | Columbia, SC |
|---|---|
| Electric utility | Dominion Energy South Carolina for most of the city; some fringe addresses are served by electric cooperatives, so check the name on your bill |
| Electricity context | Dominion averaged 14.59¢/kWh for homes in 2024 (EIA-861). Rate 5 on-peak is 29.907¢, off-peak 15.074¢ |
| Export rule for a new system | Solar Choice: monthly netting within each time-of-use period, $13.5 minimum bill, November cash-out at avoided cost, 20 kW AC limit |
| Incentives | 25% SC income tax credit, $3,500 a year cap, 10-year carryforward. Federal §25D ended after 2025 |
| System considerations | Median home built 1978, so roof age is checked first; Richland County logged 33 damaging-wind reports a year in 2015–2025 |
| Permitting | City of Columbia Development Center: building + electrical permits, sealed structural certification, 5–10 business days |
| Battery relevance | Moderate: summer peak runs 4–8 p.m. in summer (May–Sep), 6–9 a.m. in winter; batteries only count under Solar Choice if they charge from your panels |
| Next step | Get your last 12 Dominion bills, then Get Solar Options |
Sources at the foot of the page, retrieved 5 October 2026 unless dated otherwise.
What does Columbia’s housing mean for the solar market?
Columbia grew to 147,035 residents in the Census Bureau’s 2025 estimate, up 2.0% in a year, one of the faster gains among South Carolina’s large cities.
Growth has not turned it into an owner’s market: the American Community Survey puts owner-occupancy at 47.3% across 60,568 housing units, so more than half of households rent and cannot sign a solar contract or claim the state credit for the building.
The owned homes are older than most in the state’s other growth areas. Their median year built is 1978 and the median value is $243,500 (ACS 2023 5-year).
That combination makes the roof the first question in Columbia: a shingle roof near the end of its life should be replaced before panels go on, or it will have to come off later with the array removed and reinstalled at your cost.
Median household income is $55,529, so the size of the up-front bill and the pace of a credit capped at $3,500 a year matter more here than in wealthier suburbs.
What does Dominion charge Columbia households for electricity?
Most Columbia homes are on Dominion’s Rate 8: a basic facilities charge of $0.36164 a day (about $10.99 a month), 15.878¢/kWh for the first 800 kWh, then 17.442¢ in summer and 15.253¢ in winter above 800 kWh.
Columbia’s long cooling season pushes many summer bills into that upper block, and that is the energy solar replaces first.
Going solar moves you to Rate 5, the time-of-use rate the Solar Choice rider requires. Its daily charge is $0.4274 (about $12.99 a month), with 29.907¢ on-peak, 15.074¢ off-peak and 9.623¢ super off-peak.
On-peak runs 4–8 p.m. in summer (May–Sep), 6–9 a.m. in winter. Dominion’s 2024 residential average across all rates, by our arithmetic on EIA-861, was 14.59¢/kWh. Fixed charges by utility.
How much solar might a Columbia home need, and how do you estimate savings?
Size from your own twelve months of Dominion usage, not from square footage.
Solar Choice caps a residential system at 20 kW AC, and because exports bank inside each time-of-use period and the November cash-out pays only avoided cost, a system that produces more than you use over a year earns less on every extra kilowatt-hour.
Our savings method for Columbia: estimate production with NREL’s PVWatts for your address and roof, split it into energy you use as it is produced (valued at the Rate 5 price in that hour) and energy you export (valued at what it later offsets in the same period, with any November surplus at avoided cost), then subtract the change in fixed charges between Rate 8 and Rate 5.
The savings calculator and system size calculator run the same steps. Worked examples are on the Columbia solar cost page.
What does solar cost in Columbia before the equipment?
The one fee every Columbia system pays is the City building permit, which follows the Development Center’s residential schedule: $20 up to $5,000 of contract value and $4 per $1,000 or fraction above that, plus a $25 plan review.
That is $60 on an example $15,000 contract, $100 on $25,000 and $140 on $35,000. The electrical permit is separate and its fee is not on that sheet, so ask the Development Center. A property in a mapped floodplain pays a $50 floodplain review.
We do not publish a Columbia price per watt. Our rule is twelve sourced, dated local quotes before any installed-price figure, and we do not scale down a national average. The cost page shows the arithmetic and South Carolina solar cost covers the state picture.
Which incentives still apply to a Columbia system?
The 25% South Carolina credit under SC Code §12-6-3587 is the main one: each year you claim the lesser of $3,500 or half your state tax liability, on Form TC-38, and carry the rest forward up to 10 years.
The system must be certified by the Solar Rating and Certification Corporation, or an equivalent the State Energy Office endorses.
For a Columbia household with a modest state tax bill, the half-of-liability limit can bind before the $3,500 cap does, which stretches the credit over more years.
We found no City of Columbia or Dominion residential solar rebate. The IRS says §25D "is not available for any property placed in service after December 31, 2025."
South Carolina’s Solar for All award was ended by EPA in August 2025. Details and stacking rules are on Columbia solar incentives and the state tax credit page.
How does Dominion’s Solar Choice rider credit a Columbia roof?
New Columbia systems go on Dominion’s Residential Solar Choice rider (PSC Order No. 2026-374). Each month your exports are netted monthly, in kWh, within each time-of-use period; surplus offsets lower-priced periods the same month, then banks forward.
The bank is paid out each November, at avoided cost (the PR-1 off-peak winter energy credit), and the bank resets. Credits never offset the basic facilities charge and the bill never drops below $13.5. You can stay on the rider for at least 10 years.
Columbia owners who applied before 1 June 2021 keep legacy net metering until 31 May 2029. If you are buying a house that already has panels, ask the seller which arrangement the account is on. Every South Carolina utility’s export rule.
What does the City of Columbia require to permit solar?
The Development Center’s Solar Panel Installation checksheet applies to rooftop and ground arrays alike.
It asks for building and electrical permit applications, a digital set of plans drawn to scale, a site plan showing setbacks and panel locations stamped by a registered surveyor, engineer or architect, electrical specifications, structural calculations and a structural engineer’s certification.
A contract verifying job cost is not needed to start review but is needed before the permit issues. Standard review is 5–10 business days. Applications go through the City’s Access Columbia portal or to DevelopmentCenter@columbiasc.gov.
Two things add time. A property in a historic or design district needs a Certificate of Design Approval first.
A property in the floodplain or floodway follows supplementary flood rules, including the City requirement that electrical and mechanical equipment on substantially improved buildings sit at least two feet above base flood elevation. The installation page walks through the order.
Can you install solar on a historic house in Columbia?
Yes. The City’s preservation office says it has no ordinance language written specifically for solar, so it applies each district’s roof guidelines and, for individual landmarks, the Landmark District, Elmwood Park, the Governor’s Mansion Protection Area and Bailey Bill properties, the Secretary of the Interior’s Standards under City Code §17-674.
Its guidance asks for installations that are reversible, keep the roof slope, and sit on rear slopes where they are less visible from the street. Ground-mounted arrays away from the house are named as an option.
How do Columbia’s roofs and storms affect a solar system?
Wind is the recurring stress in Richland County. NOAA’s Storm Events Database lists an average of 33 thunderstorm and high-wind reports a year from 2015 to 2025, a top gust of 87 knots, and seven tornadoes.
Hail is less of a threat: 49 reports in the same eleven years, none 2 inches or larger, with the biggest at 1.75 inches. Reported property damage from all events in the county came to about $31.8 million.
Ask for racking and attachments specified to the design wind speed your structural engineer uses for the address, and check the roof before the array goes on. Roof before solar.
Does a battery pay in Columbia?
Only for some households. A battery lets midday output cover Rate 5’s on-peak window at 29.907¢ rather than banking against 15.074¢ off-peak hours, and it keeps essential circuits running through the wind-driven outages Richland County sees.
Under Solar Choice, storage counts only if it charges solely from onsite renewables. The Columbia battery page runs the numbers.
How do Columbia homeowners pay for solar?
Cash and loans leave you owning the system, which the state credit requires. A lease is possible only from an Office of Regulatory Staff–certified lessor, and power purchase agreements are not permitted in South Carolina. Compare financing options for Columbia.
How is commercial solar in Columbia different from a home system?
A business is not on Rate 5 or the residential rider, its bill may carry demand charges, and the Development Center notes that the Fire Department may need extra review time for commercial arrays. See commercial solar in Columbia.
How should you choose a Columbia solar installer?
South Carolina splits solar work across several licences. Confirm each with SC LLR yourself.
"Solar Panel Installer" is a Residential Specialty registration with the Residential Builders Commission (SC LLR): fabricating, assembling, installing and replacing panels and related components.
A builder, roofer-classified specialty contractor or roofing general contractor, not the panel registration alone.
Wiring and connection: a Residential Builder, a licensed residential electrician, or a mechanical contractor with the electrical classification.
Ask who seals the structural certification and who draws the site plan the City requires.
A door-to-door contract can be cancelled until midnight of the third business day after signing, by written notice (SC Code §37-2-502).
We do not rank or name Columbia installers. Questions to ask and how to compare quotes.
Columbia solar guides
Questions
Who is the electric utility for Columbia, SC?
Does Columbia have net metering for solar?
How much is a solar permit in the City of Columbia?
How long does solar permit review take in Columbia?
Can renters in Columbia get solar?
Is the federal solar tax credit available in Columbia?
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