Plugin Solar Central

Last reviewed 2026-07-03

New Hampshire plug-in solar status

Passed but not yet effectiveSigned; effective July 27, 2026
Where New Hampshire stands: New Hampshire enacted SB 540, signed by Governor Kelly Ayotte on May 28, 2026 (Chapter 89). The plug-in solar rules take effect July 27, 2026.

The key facts

Bill or law
SB 540
Size limit
1200 watts
Takes effect
2026-07-27

The law caps systems at 1,200 watts, bars utilities from charging extra fees or requiring prior approval, and allows self-installation without a permit.

Because the effective date is late July 2026, wait for the law to take effect — and for certified products to be available — before relying on it.

Confirm your local codes and any landlord or homeowners association (HOA) rules before installing.

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This page is informational research, not legal advice — and it can fall out of date quickly.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.

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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