Plug-in solar in New Hampshire
New Hampshire's SB 540 passed both the Senate in March 2026 and the House on April 23, 2026, and was transmitted to Governor Kelly Ayotte's desk; the bill proposes a 1,200-watt AC cap for plug-in solar devices with a January 1, 2027 effective date.
What SB 540 actually allows
System size
Up to 1,200W AC
nationally recognized testing laboratory (NRTL) certification required.
No utility approval
Interconnection waived
No application to your utility required. Self-installation with listed equipment is sufficient.
Days until law takes effect
—
Effective date: January 1, 2027
Plug-in solar will be legal in New Hampshire as of January 1, 2027. You cannot connect a plug-in system to the grid until that date.
Get notified the day this law takes effect
We'll email you as soon as plug-in solar becomes legal in New Hampshire — so you know exactly when you can install.
Where SB 540 stands right now
Introduced
Committee
Floor Vote
Apr 23, 2026
Signed
Takes effect
Jan 1, 2027
Passed both chambers
The New Hampshire legislature transmitted SB 540 to Governor Kelly Ayotte's desk after both chambers passed the plug-in solar bill, making New Hampshire one of seven states to send such legislation to its governor.
Recent updates
May
12
2026
The New Hampshire legislature transmitted SB 540 to Governor Kelly Ayotte's desk after both chambers passed the plug-in solar bill, making New Hampshire one of seven states to send such legislation to its governor.
May
7
2026
The New Hampshire Senate concurred with the House amendment to SB 540 on a voice vote, sending the final enrolled bill to Governor Kelly Ayotte.
Apr
23
2026
The New Hampshire House of Representatives passed SB 540 with amendment #2026-1452h by a vote of 293–43.
Apr
15
2026
The House Science, Technology and Energy Committee reported SB 540 'Ought to Pass with Amendment' by a majority vote of 16–1.
Mar
16
2026
SB 540 was introduced in the New Hampshire House and referred to the Committee on Science, Technology and Energy after crossing over from the Senate.
Mar
12
2026
The New Hampshire Senate passed SB 540 with an amendment after the Finance Committee reported it 'Ought to Pass' by a vote of 6–0.
Feb
19
2026
The Senate Energy and Natural Resources Committee reported SB 540 'Ought to Pass with Amendment' by a unanimous vote of 5–0, referring it to the Finance Committee.
Jan
7
2026
SB 540 was introduced in the New Hampshire Senate and referred to the Committee on Energy and Natural Resources.
What an 800W system saves in New Hampshire
Monthly savings
$21
Annual savings
$257
Payback period
~5 yrs
Based on 27.55¢/kWh avg rate · 800W system · 3.9 peak sun hours/day
Products Available in New Hampshire
New Hampshire has passed enabling legislation (SB 540). Plug-in grid connections take effect on the law's effective date — browse certified systems and components available in New Hampshire in the meantime.
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