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Sources last reviewed 2026-11-01

Content updated

New Hampshire plug-in solar status

Enacted — effective laterEnacted — utility exemption starts January 1, 2027
Where New Hampshire stands: New Hampshire enacted SB 540 as 2026 Chapter 262. Its utility interconnection exemptions under RSA 362-A:10 start January 1, 2027; the related building-code section has a separate contingent effective date.

The key facts

Bill or law
SB 540, 2026 Chapter 262
Size limit
One system per meter, up to 1,200 W AC inverter output
Enacted
Enactment date not verified
Effective date / scope
2027-01-01 (utility provisions)
Plug-in utility provisions effective
2027-01-01

Timing and implementation

  • RSA 362-A:10 explicitly takes effect January 1, 2027. The signing date is not verified here.
  • RSA 155-A:16 has a separate contingent start date: the Department of Energy commissioner must certify that a qualifying nationally recognized safety standard exists. Confirm code implementation before installing.

Eligible systems need nationally recognized testing laboratory certification. Each metered customer is limited to one system with maximum AC inverter output of 1,200 W.

The utility may establish a post-installation wattage notification process. The future exemption from utility approval does not establish a blanket waiver of building or electrical permits.

Installation checklist for New Hampshire

  • Wait for the January 1, 2027 utility exemption and confirm the separate building-code implementation status.
  • Use one qualifying NRTL-certified system per meter with AC inverter output no higher than 1,200 W.
  • Check any utility post-installation notice process, local permits, mounting, and manufacturer instructions.

Before you buy in New Hampshire

This page is informational research, not legal advice — and it can fall out of date quickly. Before installing anything, confirm the current law and its start date, any size limit, your local building and fire codes, your utility’s requirements, that the kit is certified as a complete system, your landlord or homeowners association (HOA) rules, a safe way to mount it, and the maker’s instructions.

New Hampshire plug-in solar FAQ

When does New Hampshire's utility exemption begin?

RSA 362-A:10 takes effect January 1, 2027 under 2026 Chapter 262. RSA 155-A:16 has a separate contingent date tied to the Energy commissioner's safety-standard certification. Utility approval exemptions do not establish that self-installation or skipping permits is allowed.

Estimate your savings in New Hampshire

Use the calculator to get a rough idea. For a truer number, swap the national average electricity price for your own rate (it’s on your bill), and remember that surplus power you send back may earn nothing unless your state and utility specifically pay for it.

Estimated monthly savings$12
Electricity made per year794 kWh
Time to pay off8.0 years

A planning estimate, not a promise. It doesn’t check whether plug-in solar is legal where you live, whether a kit is certified, whether your outlet or mount is suitable, or whether your utility pays for surplus power.

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