Maine's law is the only one with two tiers. Governor Mills signed LD 1730 on April 6, 2026. It became law on July 29, 2026. This guide is as of October 2026. It is not legal advice, so check your utility's page before you buy.
Is balcony solar legal in Maine now?
Yes. LD 1730 is Public Law 2025, chapter 644, and it adds section 3475 to Maine's utility law. It took effect on July 29, 2026. Some news stories gave a different date, but the state's own record says July 29. For other states, see which states allow balcony solar.
How many watts can I plug in in Maine?
It depends on the tier. Up to 420 watts of combined output per service address is plug-and-play. Systems above 420 W, up to 1,200 W, must be put in by a Maine-licensed electrician on a dedicated circuit with a single outlet. Plug-in battery systems are covered too. Inverters must shut off within 0.2 seconds of a power cut.
Do I need to tell my utility in Maine?
Only for the bigger tier. For 421 to 1,200 W, you send your utility a form within 30 days after you install. The state utility regulator posts the form. The form goes to your utility, not the state. For 420 W or less, there is no notice. A utility cannot ask for prior approval, studies or fees.
Can my landlord or HOA say no to balcony solar in Maine?
The law has no landlord-consent rule and no HOA override. It says that if you do not own the building, you must not harm its structure. You must follow building, fire and zoning codes. You must also put things back when you take it down. Ask in writing, and see our renters guide.
Do I get paid for power I send to the grid in Maine?
No. The law says these systems cannot be used for net energy billing. So extra power earns no credit. Plan on savings from using the power at home. Our savings guide shows how to estimate that for your own sun and rates.
What does a balcony solar kit need in Maine?
It must meet one of three tests. It can be listed to UL 3700. It can meet a comparable standard from a national testing lab. Or it can be set up under the national electrical code as Maine has adopted it. See kits sold in the US and our UL 3700 guide.
What can I do in Maine today?
For a small system, check your sun and your outlet, then plug in a kit of 420 W or less. For a bigger one, hire a licensed electrician and file the form within 30 days. Read what balcony solar is first. Keep the paperwork for your records.
The quick version
- LD 1730 has been in force since July 29, 2026.
- Up to 420 W: no electrician, no notice.
- 421 to 1,200 W: licensed electrician, dedicated circuit, form within 30 days.
- No credit for extra power.