Original research
Solar Incentives in Mount Pleasant, SC
Every incentive checked at its official source, with what applies to a Mount Pleasant address and what does not.
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Mount Pleasant solar incentives: what is available and what is not
Last verified 5 October 2026. Each row was checked at the source listed at the foot of the page.
| Incentive | Provider | Who qualifies | Amount and maximum | How to claim / deadline | Status for Mount Pleasant |
|---|---|---|---|---|---|
| Solar energy income tax credit | SC Department of Revenue | SC taxpayers who buy and install a system they own; system certified by SRCC or an equivalent | 25% of cost; lesser of $3,500 or 50% of tax liability per year; 10-year carryforward | Form TC-38 with the return for the year installation is complete; no end date for solar | Available |
| Residential Clean Energy Credit (§25D) | IRS | Homeowners | None for new systems | Not available for property placed in service after 31 December 2025 | Ended |
| Clean Electricity Investment Credit (§48E) | IRS | Businesses, including lessors of residential systems | Varies | Ends for wind and solar placed in service after 2027 where construction begins after 4 July 2026 | Indirect: a lessor may claim it |
| Dominion Residential Solar Choice | Dominion Energy South Carolina | Dominion customers applying on or after 1 June 2021, up to 20 kW AC | Monthly kWh netting by time-of-use period; November cash-out at avoided cost | Interconnection application; Rate 5 required | Available (most of town) |
| Renewable Surplus Rider | Berkeley Electric Cooperative | Members on non-demand, non-time-of-day rates, up to 20 kW AC | 6.03¢ per exported kWh, updated about 1 March | $150 application, $50 per inspection | Available (Berkeley addresses) |
| Solar Home rebate | Santee Cooper | Santee Cooper retail customers only | $0.95/W AC up to 6 kW AC | Through a Santee Cooper Trade Ally | Not available: Mount Pleasant is Dominion or Berkeley territory |
| Solar for All | SC Office of Resilience (EPA grant) | Low-income households | $124,440,000 state award | EPA ended the program in August 2025 | Ended |
| Town of Mount Pleasant rebate | Town of Mount Pleasant | — | — | — | None found |
| Residential solar property-tax exemption | State of South Carolina | — | — | — | None found in SC Code Title 12 Ch. 37 |
Sources at the foot of the page. Last verified 5 October 2026.
Using the SC solar tax credit on a Mount Pleasant household budget
The credit is limited three ways each year: 25% of cost, $3,500, and half your South Carolina tax liability.
Mount Pleasant’s median household income of $124,755 means many households owe enough state tax that the $3,500 cap, not the 50% limit, is what binds.
A retired household with little taxable income may owe less and use the credit slowly over the ten-year carryforward.
Worked example with example inputs: a $28,000 system yields a $7,000 credit.
A household owing $9,000 in state tax claims $3,500 in year one (half its liability would be $4,500, so the cap binds) and $3,500 in year two.
A household owing $4,000 can claim only $2,000 a year and needs four years. The full rules, including certification, are on the SC solar tax credit page.
Federal solar credits after 2025 for Mount Pleasant buyers
The IRS says §25D "is not available for any property placed in service after December 31, 2025." A Mount Pleasant homeowner buying a system today gets no federal credit. A seller who says otherwise is either describing a lease or is wrong.
Leased and business systems may use §48E; it ends for wind and solar placed in service after 2027 where construction begins after 4 July 2026 (Form 3468 instructions; Notice 2025-42).
That credit belongs to the leasing company, not to you; whether any of it reaches your lease payment is a negotiation. What the end of 25D means.
Utility export credits for Mount Pleasant: Dominion and Berkeley Electric
Neither utility serving Mount Pleasant offers a cash rebate for residential solar. What they offer is an export arrangement.
Dominion’s Solar Choice nets exports monthly, in kWh, within each time-of-use period; surplus offsets lower-priced periods the same month, then banks forward, and pays the leftover bank each November, at avoided cost (the PR-1 off-peak winter energy credit), and the bank resets.
Customers who applied before 1 June 2021 keep legacy net metering until 31 May 2029; new Mount Pleasant systems do not get it.
Berkeley Electric’s Renewable Surplus Rider pays 6.03¢ for each exported kWh, against a 2024 average residential price of 14.93¢ (EIA-861). Which utility serves your street decides which of these you get; check it on Berkeley’s territory search. All SC export rules side by side: South Carolina net metering.
Town of Mount Pleasant incentives and fee relief
We found no solar rebate, fee waiver or expedited solar permit on the Town’s website or in its July 2024 fee schedule; a solar permit is priced on valuation like any other alteration.
The Town’s one homeowner discount is on flood insurance: as a Class 6 Community Rating System community, residents get a 20% reduction in their premiums.
That is worth knowing in a coastal town, but it is not a solar incentive and does not change with panels.
Battery, business and farm incentives in Mount Pleasant
Batteries: whether a battery qualifies for the state credit is not something we could confirm from the statute or SCDOR guidance, so ask a tax adviser before counting on it. Under Dominion’s rider storage counts only if it charges solely from onsite renewables.
Businesses: the state Clean Energy Credit (Form TC-54) is capped at $500,000 a year with a 15-year carryforward; §48E applies within its deadlines. See commercial solar in Mount Pleasant.
Farms: Charleston County agriculture is small, and we cover the honest picture on solar for farms near Mount Pleasant.
Claiming solar incentives as a Mount Pleasant homeowner
Signed contract, final invoice, proof of payment, the Town permit and final inspection, and the utility’s permission to operate.
Equipment must be certified by the Solar Rating and Certification Corporation, or an equivalent the State Energy Office endorses. Ask the installer for the documentation.
With your SC return for the year installation is complete, carrying any unused credit forward on later returns.
Dominion Solar Choice or Berkeley’s Renewable Surplus Rider, through the interconnection application.
Stacking and expiry for Mount Pleasant systems
The state credit and your utility’s export credit stack: one reduces what you pay, the other values your exports. The state credit has no sunset for solar: Act 47 of 2019 re-enacted it with no end date for solar.
Export rates do change: Berkeley resets its credit each March, and Dominion’s rider was last approved in PSC Order No. 2026-374. Financing structures and how they interact with the credit are on the financing page.
Questions
What solar incentives are available in Mount Pleasant, SC?
Can I still get the 30% federal solar tax credit in Mount Pleasant?
Does Mount Pleasant offer a solar rebate?
Can a Mount Pleasant homeowner get the Santee Cooper solar rebate?
How long does it take to use the SC solar credit?
Is Solar for All available in Mount Pleasant?
Does a battery qualify for the SC solar tax credit?
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