Balcony solar in New Hampshire
Signed, most rules start Jan 1, 2027. New Hampshire’s law is SB 540. An 800 W kit on a south-facing railing saves about $139 a year here and pays for itself in about 5 years.
Last checked October 6, 2026
What New Hampshire’s law says
- The law is signed. Most of its provisions take effect on January 1, 2027.
What that means right now
Until the main provisions start, the usual utility rules apply. Wait for January 2027, or ask your utility.
If you rent or have an HOA
Ask your landlord or HOA before you buy. Renters guide.
What a kit saves in New Hampshire
Estimates at New Hampshire’s average power price (26.9¢/kWh), 250 W of always-on use at home, extra power counted as $0.
| Setup | Makes per year | Saves per year | Paid back in |
|---|---|---|---|
| 800 W, south-facing railing ($700) | 706 kWh | $139 | 5 yrs |
| 800 W, east or west railing ($700) | 544 kWh | $115 | 6.1 yrs |
| 800 W, south, tilted stand ($700) | 1,040 kWh | $171 | 4.1 yrs |
| 1,200 W, south-facing railing ($1,000) | 1,058 kWh | $165 | 6.1 yrs |
Month by month (800 W, south railing)
A panel hanging straight up does best when the sun is low, so winter months hold up better than you’d expect.
New Hampshire has high power prices, which helps payback.
Calculate for my home in New Hampshire
Before you buy
- Confirm the law applies on the date you want to plug in.
- Buy a kit certified to the standard the law requires. UL 3700 explained.
- Stay within the size limit.
- Get your landlord’s or HOA’s OK in writing.
- Check your spot: direction, shade, and a solid railing or stand.
New Hampshire: common questions
Is balcony solar legal in New Hampshire?
Signed, most rules start Jan 1, 2027. The law is SB 540. Until it takes effect, your utility's normal rules apply.
How much can balcony solar save in New Hampshire?
About $139 a year for an 800 W kit on a south-facing railing, at New Hampshire's average power price of 26.9¢ per kWh. On a tilted stand facing south, about $171.
How long does it take to pay back in New Hampshire?
About 5 years for a $700 kit on a south-facing railing, before power prices rise. Rising prices shorten that.
How many sun hours does New Hampshire get?
About 4.3 peak sun hours a day on average across the year, at a typical location in the state.
Can my landlord or HOA stop me in New Hampshire?
Ask your landlord or HOA before you buy.
Sources
- Solar.com, 2026 Guide to Balcony & Plug-In Solar (state law table, updated October 1, 2026).
- Electricity prices: U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A (March 2026 data).
- Production and savings: our calculation method.