H 4579
Did not passBalcony Solar Panels
Prefiled and referred to the House Labor, Commerce and Industry Committee on December 16, 2025. No committee vote is recorded.
Is balcony solar legal in South Carolina?
Not yet. South Carolina has no plug-in solar law.
Without a specific law, connecting any solar device to your home's wiring falls under your utility's interconnection rules, which usually require an application.
- Size limit
- No law
- Utility notice
- Interconnection rules apply
- Electricity price
- 15.9¢/kWh
- 800 W kit payback
- 6.5 years
Where things stand in South Carolina
The 2025–2026 General Assembly’s regular session ended in May 2026 without action on plug-in solar.
What this means if you live in South Carolina
With no plug-in solar statute, a grid-tied kit is treated like any other generator connected to your home. Utilities generally require an interconnection application before you connect anything that can push power into the wiring, and connecting without approval may violate your utility's terms of service. Plugging in a kit is not clearly legal or clearly illegal; it is unapproved.
Your options today
- Ask your utility. Some utilities offer a simplified application for very small systems. Ask whether a certified plug-in kit under 1,200 W can be approved, and get the answer in writing.
- Go off-grid instead. Panels that charge a portable power station, with devices plugged into the station rather than the wall, never connect to the grid and need no approval. You lose some efficiency and pay for the battery.
- Plan for when the law changes. A certified kit bought now will meet the rules most states have adopted: up to 1,200 W, listed by a testing lab, with automatic shutoff. See how to choose a kit.
- Tell your legislators. Bills have moved fastest where constituents asked for them. Ten states passed laws in about 18 months.
Federal bill. Socket Full of Sunshine Act (H.R. 10851): Introduced in Congress on October 19, 2026 by Rep. Rob Menendez (D-N.J.). It would remove utility approval and fees for plug-in systems up to 1.2 kW nationwide, give state regulators two years to set a standard, bar landlords from blocking tenants with some exceptions, and fund state rebates of up to $1,000 for low- and middle-income households. It has not passed. Source.
What a balcony kit would save in South Carolina
South Carolina's average residential price was 15.9¢ per kWh for January–August 2026, below the US average of 18.2¢ and up 6% from the same months of 2025 (EIA). That ranks 26 of 51 for price, so these are the savings you would see if the kit were allowed.
| 800 W kit, $700 | kWh per year | Savings per year | Payback |
|---|---|---|---|
| Hanging on a south-facing railing | 799 | $107 | 6.5 years |
| East / west railing (average of both directions) | 661 | $90 | 7.8 years |
| Tilted 35° on a stand, facing south | 1270 | $144 | 4.8 years |
Assumes a constant 300 W load, no additional shade and no export credit. Hourly-derived typical-year model for Charleston, a representative location rather than a state average. How we calculate.
Before you connect anything
- Call or email your utility and ask how it treats a certified plug-in kit under 1,200 W.
- If you want power now, consider an off-grid setup with a portable power station.
- If you buy a grid-tied kit to use later, make sure it is listed by a testing lab. See UL 3700 explained.
- Read the safety guide before plugging anything in.
Common questions
Is plug-in solar legal in South Carolina?
Not yet. South Carolina has no plug-in solar law. Without a specific law, connecting any solar device to your home's wiring falls under your utility's interconnection rules, which usually require an application. Status checked October 29, 2026.
Is there a plug-in solar bill in South Carolina?
H 4579: Prefiled and referred to the House Labor, Commerce and Industry Committee on December 16, 2025. No committee vote is recorded.
Can I use solar panels in South Carolina without connecting to the grid?
Yes. Panels that charge a portable power station, with your devices plugged into the station rather than a wall outlet, are not connected to the grid and do not need utility approval. Grid-tied plug-in kits are a different matter until South Carolina passes a law or your utility approves the connection.
How much would balcony solar save in South Carolina?
At South Carolina's average residential price of 15.9¢/kWh, an 800 W kit hanging on a south-facing railing would save about $107 a year in our model, paying back a $700 kit in about 6.5 years. The average of east- and west-facing railing scenarios saves about $90.
Sources for South Carolina
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