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Is plug-in solar legal in Kentucky?
No specific law
Kentucky has no plug-in solar law. Plugging a kit into an outlet falls under your utility's interconnection rules, which usually require approval.
Max system sizeNo capsmallest tier: Level 1 inverter-based <=30 kW
Electrician / permitPermit and inspectionutility rules apply
Tell the utility?Interconnection applicationtypical fee $0
CertificationUL 1741 inverterrequired by every utility
What this means for you
✓ What you can do
- Apply for interconnection like any small generator (Level 1 inverter-based <=30 kW), typical fee $0.
- Use portable panels with a power station, never connected to house wiring, with no permission at all.
- Install conventional rooftop or ground-mount solar through the standard interconnection process.
✕ Not yet / not allowed
- Plug a grid-tied kit into an outlet without an interconnection agreement; it can breach your service terms.
- Expect a permit or wiring exemption; none exists without a law.
- Count on a law soon: no plug-in solar bill has been filed.
What the rules say
No plug-in solar law or bill in Kentucky.
No law doesn't mean no rules. In Kentucky, a kit that pushes power back into your home wiring is treated like any other grid-connected generator. Most utilities require an interconnection application, and plugging in without one can breach your service agreement. Off-grid use (panels charging a battery that powers devices directly) avoids this entirely.
Before you plug in: Kentucky checklist
- The rule that applies is Kentucky Public Service Commission's interconnection process: KRS 278.465-.468; PSC Interconnection Guidelines.
- A plug-in kit falls in the smallest tier (Level 1 inverter-based <=30 kW). $0 (LG&E/KU).
- Permits: Local governments issue permits/inspections; 2023 NEC.
- Only consider kits with a UL 1741-listed inverter (UL 3700 preferred); a non-listed inverter will not be approved anywhere.
- What exports are worth: NMS-2 dollar credit $0.07534/kWh (KU, Sheet 58, 3/6/2026); cut to ~$0.0386 proposed.
- If approval is slow or costly, a portable panel and power station (never connected to house wiring) needs no permission.
- No plug-in solar bill has been filed yet; the nearby states that passed laws in 2026 are the template to expect.
The rules in detail
Kentucky has no statute specific to plug-in solar. Average residential electricity price: 13.81¢ per kWh (EIA, July 2026).
Your utility's rules in Kentucky
No utility in Kentucky publishes a rule that specifically allows or bans outlet-connected generation, so the general interconnection agreement is what applies. Here is what the largest residential utilities say and require.
| Utility | Residential customers | Published position on plug-in kits |
|---|---|---|
| Kentucky Utilities | 450,673 | No specific statement; 'Nearly all net metering applications do not have a fee'; 'Once approved, you can begin installing your system'. source |
| Louisville Gas & Electric | 384,902 | Same as KU. source |
| Duke Energy Kentucky | 139,405 | No specific statement. |
| Kentucky Power | 130,852 | No specific statement. |
Interconnection terms for a sub-1.2 kW system
| Regulator | Kentucky Public Service Commission. |
|---|---|
| Governing rule | KRS 278.465-.468; PSC Interconnection Guidelines. |
| Smallest tier | Level 1 inverter-based <=30 kW; net metering <=45 kW. |
| Application fee | $0 (LG&E/KU). |
| Electrician / permit | Local governments issue permits/inspections; 2023 NEC. |
| Export compensation | NMS-2 dollar credit $0.07534/kWh (KU, Sheet 58, 3/6/2026); cut to ~$0.0386 proposed. |
| Electrical code | 2023 NEC (eff. 1/1/2025). |
In practice
- No-fee application plus ~7.5 c credit; credit may be halved.
- Western KY TVA distributors outside PSC net metering.
State incentives
- None found.
Who is pushing for a law
- Kentucky Solar Energy Society
- Kentuckians For The Commonwealth
- Mountain Association
Savings preview: 800 W kit in Kentucky
Adjust for your setup →≈ $117/year
Frequently asked questions
Is plug-in solar legal in Kentucky?
Kentucky has no plug-in solar law. Plugging a kit into an outlet falls under your utility's interconnection rules, which usually require approval.
Do I need a permit or electrician for plug-in solar in Kentucky?
Default. Check with your local building department before you plug in.
Do I have to tell my utility in Kentucky?
Default. Plugging in a grid-tied kit without following this can breach your service agreement.
What can an 800 W plug-in kit save in Kentucky?
Roughly 845 kWh and about $117 per year at Kentucky's average residential rate of 13.81¢/kWh, assuming a typical balcony or patio mount. See the calculator for your exact setup.