New HampshireGov. Ayotte signs SB 540 into law
Is plug-in solar legal in New Hampshire?
In effect. Gov. Kelly Ayotte signed SB 540 into law on July 3, 2026, establishing a legal category for plug-in solar generation systems separate from traditional grid-tied solar. The law takes effect today, July 27, 2026, making New Hampshire one of a growing handful of states with an express plug-in solar pathway. Confirm current requirements with your utility before installing.
Last reviewed: July 2026 · Compare New Hampshire with every other state
New Hampshire's plug-in solar bill, SB 540-FN, moved through the legislature in 2026 and was enrolled in mid-June after passing both bodies. Gov. Kelly Ayotte signed the balcony solar bill on July 3, 2026, and the law takes effect today, July 27, 2026 — making New Hampshire the latest state to give residents a clear, legal path to small plug-in solar.
What the law does
SB 540 establishes a distinct category for plug-in solar generation systems in New Hampshire — separate from traditional grid-tied rooftop solar — so residents can use small portable panels that connect to a standard outlet without navigating a full interconnection process. As the Concord Monitor reported, the bill's backers pitched it as a low-cost, renter-friendly way for people to trim their electric bills.
Now in effect
As of July 27, 2026, the law is live. Before plugging in, confirm the current requirements with your utility — including any equipment or notification specifics they may publish as implementation gets underway.
Sources & further reading
This is general guidance, not legal advice. Plug-in solar rules vary by state, utility, and local code, and they change often. Always confirm current requirements with your utility and local authority before installing.
Disclaimer: Consumers should consult with a licensed electrician to ensure their home power system is safe, up to code, and compatible with plug-in solar systems.
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