Is plug-in solar legal in New Hampshire?
Legal from Jan 1, 2027 Not yet, but soon. New Hampshire signed SB 540-FN (Chapter 262) on July 2, 2026; it takes effect Jan 1, 2027.
| Law | SB 540-FN (Chapter 262) |
|---|---|
| Signed | July 2, 2026 |
| Takes effect | Jan 1, 2027 |
| Size limit | 1,200 W AC, one system per metered customer |
| Safety certification | Listed by a recognized lab to safety standards for distributed generation |
| Telling your utility | Only if your utility sets up a reporting method; you report after installing |
| Renters and HOAs | Not addressed in the law |
Until the start date, the usual utility rules apply. Kits bought now should already meet the certification rule above, so you can plug in on day one.
What a kit would save in New Hampshire
| Kit size | Solar per year | Saved per year |
|---|---|---|
| 400 W | 362 kWh | $85 |
| 800 W | 725 kWh | $170 |
| 1,200 W | 1,087 kWh | $255 |
Panels on a south-facing balcony railing, New Hampshire’s average sunshine (NREL PVWatts, state average), today’s price of 27.6¢/kWh, and 85% of the output used at home. Run it for your ZIP code.
See every state’s plug-in solar status, or electricity prices and other rules in New Hampshire.