Correction, September 19, 2026: An earlier version of this article said Maine’s law stops landlords from prohibiting plug-in solar and requires tenants to give written notice. That was wrong: LD 1730 doesn’t mention landlords, tenants or leases. It takes the utility out of the way, allows systems up to 420W with no paperwork, and requires a licensed electrician for larger systems up to 1,200W. We’ve corrected the article below.
Maine’s plug-in solar law, LD 1730, takes effect in July 2026, making Maine the fifth US state where the utility can’t stand in the way of a compliant plug-in solar system. Systems up to 420 watts need no paperwork at all; larger ones, up to 1,200 watts, need a licensed electrician. The law doesn’t address landlords, so if you rent, your lease still decides.
In a few weeks, Maine households get a law that takes the utility out of the decision entirely.
Plug-in solar has spent the last two years moving from a niche European habit to actual US legislation. Utah went first in 2025. Then, in a single stretch of 2026, Maryland, Virginia, Colorado, and Maine all followed: four laws signed within about a month of each other. Maine’s, LD 1730, is the next one to actually flip on.
What LD 1730 actually does
Starting in July 2026, a Maine utility can’t require approval, an interconnection application, or fees for a compliant plug-in solar system. That’s the headline. The mechanics matter just as much:
Maine LD 1730 · Effective July 2026
Systems up to 420W need no paperwork. Systems from 420W to 1,200W must be installed by a licensed electrician on a dedicated circuit, and you notify your utility within 30 days. Equipment must be listed to UL 3700 or a comparable standard, or set up to meet the National Electrical Code. No utility approval, no interconnection application, no fee.
What it doesn’t change: your lease
Like most of the plug-in solar laws passed so far, Maine’s removes the utility as a barrier but leaves the landlord relationship untouched. It doesn’t mention landlords, tenants or leases at all. The one rule aimed at people who don’t own their building is practical: you can’t compromise the structure or break building codes, and you restore the structure when you take the system down.
So if your lease prohibits exterior equipment, that clause still applies.
Where Maine fits in a fast-moving picture
Five states now have enacted plug-in solar laws: Utah (effective May 2025), Colorado and Maryland (2026), Maine (effective July 2026), and Virginia (signed, but not effective until January 1, 2027). Connecticut has also signed a law, and California and New York have bills still in play. See the full state-by-state tracker for exact wattage caps and requirements.
LD 1730 doesn’t require Maine utilities to offer net metering for plug-in systems; savings come from offsetting real-time usage, not selling power back. It doesn’t limit what a landlord can put in a lease. And it doesn’t address condos, co-ops or HOAs, which can still set their own rules. It’s also worth remembering that the actual savings are modest: a single panel offsets $6–$23 a month depending on Maine’s electricity rate and the panel’s sun exposure. This is a legal unlock, not a windfall.
If you’re a Maine renter
The practical move is to get ahead of it rather than wait for the law to kick in:
- Check your exact address. Sun exposure varies a lot balcony to balcony. Our Solar Advisor pulls a real aerial view of your building and estimates what a panel would actually earn you there.
- Ask your landlord in writing. LD 1730 doesn’t give renters a right to install over a landlord’s objection, so a clear, specific request (wattage, mounting method, certification) is your best path to a yes.
- Pick a certified kit. Not every plug-in panel on the market meets the 1,200W cap or carries the right certification. Our recommended kits page only lists systems that clear that bar.
Maine is the fourth state this year to take the utility out of the way for plug-in solar. If the pattern from Utah, Maryland, and Colorado holds, it won’t be the last.
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