South Carolina
Solar in Rock Hill, SC: Costs, Savings, Incentives & Local Options
What the city utility pays for your exports, what the permit needs, and what is still claimable, for homes on Rock Hill’s municipal electric system.
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Rock Hill solar at a glance
| Factor | Rock Hill, SC |
|---|---|
| Utility | City of Rock Hill electric (municipal), wholesale power from PMPA under a contract running 1980–2028. Some addresses near the city are on Duke Energy Carolinas or York Electric Cooperative: check your bill |
| Electricity context | 12.55¢/kWh average residential price, 36,492 residential customers (EIA-861, 2024, HyreSolar calculation) |
| Export credit | PMPA Schedule A: 3.874¢/kWh on-peak, 2.168¢ off-peak, credited on your city bill; unused credit paid out at year end |
| Incentives | 25% SC income tax credit (Form TC-38). We found no city solar rebate; the SmartChoice rebates cover heat pumps and water heaters |
| System considerations | Size to daytime self-use; exports earn a fraction of retail. Residential liability insurance of $100,000 per occurrence is required |
| Permitting | Planning & Development, online services portal: structural analysis by an SC-licensed engineer, power riser diagram, signed contract, both utility agreements |
| Battery relevance | Moderate: storing midday output for evening use avoids selling at the avoided-cost rate. York County logged 7.09 wind events a year, 2015–2025 |
| Homes | Median built 1995; 53.5% owner-occupied; median value $267,400 (ACS 2023 5-year) |
| Next step | Get Solar Options, then ask any proposal to model PMPA credits, not net metering |
Sources at the foot of the page. City and utility documents read 5 October 2026.
Is solar worth considering in Rock Hill?
Rock Hill is a harder solar case than a Duke Energy town a few miles north, and a fairer one than its reputation.
Each kilowatt-hour your panels make and you use on the spot is worth whatever the city would have charged you, about 12.55¢ on average. Each kilowatt-hour you export earns 3.874¢ or 2.168¢.
A household that is home in the daytime, runs a pool pump, or charges an electric car at midday keeps more of its output and gets a better return than one that is out all day.
The housing helps. Rock Hill’s median home was built in 1995 and just over half are owner-occupied (53.5%), so there is a large pool of roofs young enough to carry panels for 25 years without a re-roof first.
The savings calculator will give you a first figure from your own bill; set its export rate to the PMPA credit, not to retail.
Why Rock Hill’s municipal utility changes the solar math
Act 62 of 2019 created the Solar Choice tariffs that Duke Energy Carolinas and Dominion Energy use, but its chapter exempts electrical utilities with fewer than 100,000 customer accounts, and state law treats a city as an “electrical utility” only for its operations outside its own limits.
Rock Hill reported 36,492 residential customers to the EIA for 2024. The Public Service Commission does not set its solar terms, and the June 2021 cut-off and 2029 legacy end date in Act 62 have no bearing on a Rock Hill bill.
What applies instead is a contract. Rock Hill buys all of its power from PMPA under a 1980 all-requirements agreement, which, the Tri-Party agreement explains, limits the city’s ability to buy energy from customers directly.
So PMPA buys it, the city reads the meter and passes the credit through. Your system serves your own load first; only the surplus is sold. How every South Carolina utility treats exports.
Rock Hill’s net billing credit under PMPA’s Schedule A
| Period | Hours | Credit for exported kWh |
|---|---|---|
| On-peak, June–September | 1–9 p.m., Monday–Friday | 3.874¢/kWh |
| On-peak, October–May | 6 a.m.–1 p.m., Monday–Friday | 3.874¢/kWh |
| Off-peak | All other hours, and all of Saturday and Sunday | 2.168¢/kWh |
PMPA Net Billing Rate Schedule (Schedule A to the Tri-Party agreement), rates in effect from 1 January 2021, document revised 17 September 2020.
PMPA calls these credits minimums: it can change them with wholesale costs, and the city may choose to pay more. New agreements take the rates in effect when signed. Ask the Utilities Department (803-325-2500) for the current Schedule A before you sign anything.
How much solar does a Rock Hill home need?
In Rock Hill the right size is set by your daytime use, not your annual total.
Because a surplus kilowatt-hour earns at most 3.874¢, a system sized to cover 100% of a year’s use exports a lot of cheap power in spring and fall.
Pull twelve months of usage from your city bill and look at the lowest months: a system whose output roughly matches the daytime share of those months wastes little.
The city’s Great Rate and heat-pump rates switch from winter to summer pricing each 1 April and back after 30 November, so if you are on one of them, ask the proposal to price your self-use against both seasons. The system size calculator and panel count tool do the arithmetic.
What does solar cost in Rock Hill before equipment?
The city permit is the one fixed local cost. Rock Hill charges $35 for the first $1,000 of valuation plus $5 for each further $1,000, up to $200,000, and a plan review of 25% of the permit fee, rounded up.
On a $25,000 contract that is $155 plus $39, or $194, before the separate electrical trade permit.
We do not publish a Rock Hill price per watt: our rule is twelve sourced, dated local quotes before any installed price, and we will not scale down a national average. Rock Hill solar cost, with three worked scenarios.
Which solar incentives apply in Rock Hill?
Three things are worth money. The SC solar energy credit is 25% of the cost of a system you own, capped at $3,500 a year with a ten-year carryforward, on Form TC-38.
The PMPA export credit is real but small. The federal residential credit is gone: the IRS says §25D is not available for property placed in service after 31 December 2025.
We found no city solar rebate. Rock Hill’s SmartChoice program pays $400 for a 16 SEER heat pump and $225 for a 40-gallon electric water heater, and its Green Power option charges $3 a month per 100 kWh block to fund Santee Cooper’s Solar Schools; neither pays for rooftop panels.
How a solar installation is permitted in Rock Hill
The city’s Solar Panels Permit Application (last updated 10 March 2023) sets the order.
If the bill says City of Rock Hill, the PMPA agreement applies. A Duke Energy or York Electric bill means that utility’s rules, and possibly York County, not the city, as the permit office.
Plans, power riser diagram, equipment cut sheets, a structural analysis from an SC-licensed engineer for roof mounts, the signed contract and an HOA letter if you have one.
The city emails an invoice to pay online and returns comments in about ten business days.
The Standard Interconnection Agreement, the Tri-Party Net Billing agreement and proof of $100,000 liability cover go to the Utilities Department.
The city fits a bidirectional meter once the paperwork is approved. Do not run the system in parallel with the grid before then.
Step-by-step timing: solar panel installation in Rock Hill.
Rock Hill roofs, wind and hail
York County is wind country more than hail country. NOAA’s Storm Events Database lists 7.09 thunderstorm and high-wind events a year in the county from 2015 to 2025, gusts to 80 knots and four tornadoes, against 2.55 damaging hail reports a year and one stone of 2 inches or more (the largest, 2.75 inches).
That is why the city asks for an engineer’s check of components-and-cladding wind loads on every roof-mounted system.
Ground mounts are allowed only where a roof mount is impractical, must sit behind the house and be screened from the street, and may not stand taller than the house.
Does a battery make sense on Rock Hill’s system?
More than it would on full net metering. Every kilowatt-hour you store at noon and use at 7 p.m. avoids buying power at retail instead of selling it to PMPA for 2.168¢ to 3.874¢.
Whether that pays back depends on how much surplus you actually make, which is why the battery decision comes after sizing. Battery storage in Rock Hill.
Paying for solar in Rock Hill
Cash, a solar loan or home-equity borrowing keep you as the owner, which the 25% state credit requires. The city’s 6% SmartChoice loans are for heat pumps, not panels.
A power purchase agreement with an installer is not allowed in South Carolina, and in Rock Hill the only buyer of your surplus is PMPA. Financing options and payment arithmetic.
Residential versus commercial solar in Rock Hill
Businesses use the same Tri-Party framework but carry $300,000 of liability cover instead of $100,000, need a contractor with a mechanical licence and electrical classification, and buy power on the city’s GS, GD or LG commercial rates, which turn on metered demand. Commercial solar in Rock Hill.
Choosing a solar installer for a Rock Hill home
The city sets its own licensing rule on the permit application. Ask each company which licence covers your job.
An SC Residential Builder’s licence, a solar installer registration with a roofing specialty, or a Contractor’s Licensing Board licence. Framing work needs a carpenter classification.
Rock Hill permits electrical work separately and requires an SC-licensed electrical contractor. A solar installer may not subcontract it; a Residential Builder may.
Every contractor working in the city needs one.
If the savings assume your exports earn retail, the proposal is built for the wrong utility.
We do not rank or recommend installers. How to compare Rock Hill solar installers.
Questions to ask before signing in Rock Hill
Ask what export rate the savings model uses and where it came from; what share of output the model assumes you use yourself; whether the price includes the city permit, plan review and electrical trade permit.
Who signs the Tri-Party agreement paperwork; and whether the company will sell or claim your renewable energy certificates, since PMPA and the city hold a first right of refusal on them.
South Carolina also gives you until midnight of the third business day to cancel a door-to-door sale in writing.
Every Rock Hill solar guide
Questions
Does Rock Hill have net metering?
Do Duke Energy’s Solar Choice rules apply in Rock Hill?
What happens to unused solar credits in Rock Hill?
Who do I call about solar on the Rock Hill electric system?
Is there a City of Rock Hill solar rebate?
Can I put solar panels in my front yard in Rock Hill?
Does the federal solar tax credit still apply in Rock Hill?
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