Is plug-in solar legal in Maine?
Legal now Yes. Maine's plug-in solar law (LD 1730) has been in effect since July 29, 2026.
| Law | LD 1730 |
|---|---|
| Signed | Apr 6, 2026 |
| In effect since | July 29, 2026 |
| Size limit | 420 W AC per address on your own; up to 1,200 W with a licensed electrician and a dedicated outlet |
| Safety certification | UL 3700 or a comparable recognized-lab standard; inverters must shut off within 0.2 seconds of an outage |
| Telling your utility | Above 420 W, notify the utility within 30 days |
| Renters and HOAs | You must restore the building when the system comes down |
Before you buy, check the kit’s certification against the rule above. As of our last check, certified microinverters exist (Hoymiles and APsystems, certified to UL 3700 in 2026) but we couldn’t confirm a complete kit certified as a whole system. What UL 3700 means.
What a kit would save in Maine
| Kit size | Solar per year | Saved per year |
|---|---|---|
| 400 W | 380 kWh | $104 |
| 800 W | 760 kWh | $207 |
| 1,200 W | 1,140 kWh | $311 |
Panels on a south-facing balcony railing, Maine’s average sunshine (NREL PVWatts, state average), today’s price of 32.1¢/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 Maine.