Charleston, SC
Solar Panel Installation in Charleston, SC
Each step from first visit to permission to operate, with who does it in Charleston.
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The Charleston solar installation timeline, step by step
The order below follows the City’s permit guidance and the utility riders. Durations depend on the installer, the City’s queue and the utility; none are published, so none are given.
| Step | What happens in Charleston | Who does it |
|---|---|---|
| 1. Consultation | Confirm whether the address is Dominion or Berkeley Electric, and whether it is in the Old and Historic District or Old City District | You and the installer |
| 2. Site assessment | Roof age, framing, shading from live oaks, main panel capacity, and the base flood elevation where equipment will hang | Installer |
| 3. Design | Array sized to your use and the rider’s 20 kW AC limit; layout keeps roof access pathways | Installer |
| 4. Engineering | Structural letter sealed by an SC design professional for 150 mph wind and seismic category D2 | Engineer |
| 5. Permitting | Customer Self Service portal: “Solar Panel – Single Family/Duplex” plus an “Electrical – Single Family/Duplex” sub-permit; BAR or zoning if they apply | Installer, City Building Inspections |
| 6. Utility approval | Dominion interconnection and Solar Choice enrolment, or Berkeley Electric Renewable Surplus Rider application | Installer and you |
| 7. Installation | Mounting by a roofer-classified or builder licence; wiring by a licensed electrician or builder | Licensed crews |
| 8. Inspection | Residential electrical rough, electrical final and building final, booked on the same portal | City inspectors |
| 9. Interconnection | Meter work by the utility; Dominion’s chart describes a second meter to measure solar generation | Utility |
| 10. Permission to operate | Written approval to energise the system | Utility |
City of Charleston, Solar / Photovoltaic Panels (Residential) guidance, September 2025; Dominion and Berkeley Electric rider documents, retrieved 5 October 2026.
What a Charleston site assessment should check
Three things are particular to Charleston houses. Tree canopy over older West Ashley, James Island and Peninsula lots varies house by house, so ask for an on-site shade report rather than a satellite guess.
Termite risk is rated very heavy in the City’s design criteria, so any rotten or damaged rafters found at the attic inspection have to be repaired before the engineer will sign.
And on a raised or ground-floor-garage house in a flood zone, the installer should say where the inverter, disconnect and any battery will be mounted relative to the base flood elevation; the City requires 2 feet of freeboard for new construction and 1 foot for residential substantial improvements.
Designing and engineering a Charleston solar array
The design has to satisfy both the utility and the structure. On Dominion, Solar Choice limits the system to 20 kW AC and pays any year-end surplus at avoided cost, so the design should target your own use; Berkeley Electric publishes a ceiling of annual kWh ÷ 1,800.
On the structural side, the City’s design criteria under the 2021 South Carolina Building Codes call for a 150 mph wind speed and seismic category D2, and the permit cannot be issued without a sealed engineer’s letter covering the roof or ground mount.
2021 South Carolina Building Codes (2021 IRC/IBC) in force; the 2024 IRC is scheduled for local implementation from 1 January 2027 (date not yet confirmed against the State Register — say "scheduled").
In the historic districts, the Board of Architectural Review prefers rear slopes, positions behind parapets and accessory buildings, panels no more than 8 inches above the roof at its pitch, and conduit painted to match. A design meant for BAR review should be drawn that way from the start.
What the City of Charleston solar permit needs
From the City’s September 2025 guidance. Apply on the Customer Self Service portal or at the Permit Center, 2 George Street, ground floor.
Permit type “Solar Panel – Single Family/Duplex dwelling”, work class “New”.
Work class “Sub”. No inspections are done under the sub-permit itself; they run under the building permit.
Array locations, roof access and pathways.
Ground mounts also need a zoning review.
Signed and sealed by a South Carolina design professional, for roof or ground arrays.
Equipment as installed should match it.
Only in a designated historic district.
Fees are on solar cost in Charleston. An EV charger needs its own permit.
Utility interconnection for Charleston solar: Dominion or Berkeley Electric
Dominion customers apply to join the Residential Solar Choice rider, which requires time-of-use Rate 5.
Dominion’s residential programs chart lists a $100 interconnection application fee and describes a second meter to measure all solar generation; confirm both when you apply, because that chart is dated April 2022.
Berkeley Electric members file for the Renewable Surplus Rider with a $150 application fee and a $50 field inspection, and cannot stay on a time-of-day rate.
Johns Island is served by both utilities, so the installer should confirm which one before filing.
Do not energise the system on the day the crew finishes. The utility’s written permission to operate comes after the City’s final inspection. What permission to operate means and the interconnection timeline tool.
Installation day and inspections on a Charleston roof
South Carolina splits the work by licence. The City’s guidance says a registered “Solar Panel Installer” may install panels and their electrical system but not roof mounting or framing, which needs a Residential Builder, a Residential Specialty Contractor with the Roofer classification, or a General Contractor with roofing.
Wiring and connection need a builder, a licensed residential electrician, or a mechanical contractor with the electrical classification.
Ask who will be on the roof and under which licence; checking them is covered on solar installers in Charleston.
City inspectors then complete the residential electrical rough, electrical final and building final. A failed re-inspection costs $100 under the fee schedule.
If the meter was pulled during the work, an electrical pre-power and service inspection is added.
The City issues a certificate of construction completion only if you ask for one; keep the final inspection record for your tax credit file either way.
What delays a solar installation in Charleston
A historic-district design that shows panels from the street on a Category 1 or 2 building will not be approved.
The permit cannot be issued without it.
Repairs come before engineering sign-off.
Common on Johns Island, where both Dominion and Berkeley Electric serve.
A service upgrade adds a City electrical fee and utility coordination.
Named storms shut down roof work and can back up both inspections and utility crews.
Adding a battery to a Charleston installation
The City’s residential solar guidance does not mention batteries, while Charleston County’s unincorporated permit requirements ask for the electrical schematic to show any battery system.
If your house is inside City limits, ask the installer to confirm with Building Inspections how the battery will be permitted before the application goes in. On Dominion, the battery must charge only from your panels to count as part of the Solar Choice system.
Whether a battery is worth it is on solar battery storage in Charleston.
Preparing a Charleston home for solar installation
From Dominion or Berkeley Electric, so the system is sized to your use.
Replace an old roof first; removing and reinstalling an array later is a separate cost.
Your elevation certificate, if you have one, tells the installer where equipment can go.
If the property is in a designated district, budget time for the BAR.
The engineer or installer needs to see rafters and attachment points.
Questions
How long does solar installation take in Charleston, SC?
Do I need a permit to install solar panels in Charleston?
What inspections does Charleston require for solar?
Can a solar panel installer mount panels on my roof in Charleston?
Do I need BAR approval for solar in Charleston?
Who installs the meter for solar in Charleston?
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