Balcony solar in Maine
In effect since July 29, 2026. Maine’s law is LD 1730. An 800 W kit on a south-facing railing saves about $146 a year here and pays for itself in about 4.8 years.
Last checked October 6, 2026
What Maine’s law says
- The law took effect on July 29, 2026.
- Like other plug-in solar laws, it lets qualifying kits skip the utility’s interconnection process.
What that means right now
The law is in effect. Read the final text on the Maine Legislature’s website for the exact size limit and certification rules before you buy.
If you rent or have an HOA
Plug-in laws generally don’t override leases or HOA rules. Ask first. Renters guide.
What a kit saves in Maine
Estimates at Maine’s average power price (28.3¢/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) | 709 kWh | $146 | 4.8 yrs |
| 800 W, east or west railing ($700) | 544 kWh | $120 | 5.8 yrs |
| 800 W, south, tilted stand ($700) | 1,040 kWh | $179 | 3.9 yrs |
| 1,200 W, south-facing railing ($1,000) | 1,064 kWh | $173 | 5.8 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.
Maine’s power prices are high, so even with northern sun a kit pays back in reasonable time.
Calculate for my home in Maine
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.
Maine: common questions
Is balcony solar legal in Maine?
In effect since July 29, 2026. The law is LD 1730.
How much can balcony solar save in Maine?
About $146 a year for an 800 W kit on a south-facing railing, at Maine's average power price of 28.3¢ per kWh. On a tilted stand facing south, about $179.
How long does it take to pay back in Maine?
About 4.8 years for a $700 kit on a south-facing railing, before power prices rise. Rising prices shorten that.
How many sun hours does Maine 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 Maine?
Plug-in laws generally don’t override leases or HOA rules. Ask first.
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.