Plug-in solar in Maine
An Act to Make Small Plug-in Solar Generation Devices Accessible for All Maine Residents to Address the Energy Affordability Crisis
Current status Enacted
Primary source Checked28 Aug 2026
- Bill / statute
- LD 1730 (S.P. 676); Public Law 2026, Chapter 644
- Signed
- 6 Apr 2026
- Effective
- 29 Jul 2026
- Max output per the bill
- 420 self-install; 1200 if installed by a Maine-licensed electrician (combined inverter output, per service address)
Checked 28 Aug 2026
Status reflects the text of the bill or statute linked in each row as published by the state legislature, checked on 28 Aug 2026. We summarize what the text says; we do not assess whether a system may be used in your home. Laws change and utilities apply their own rules. Read the linked source and check with your utility before buying or connecting anything.
Certification the bill requires
'Listed or certified in accordance with UL 3700, the Outline of Investigation for Interactive Plug-in Photovoltaic Equipment and Systems' or a comparable standard from a nationally recognized testing laboratory.
Notification
Required only for systems exceeding 420 W: the customer must notify the transmission and distribution utility within 30 days of installation. No notification for the 420 W tier.
Details recorded on the source check
Two-tier structure quoted verbatim from the chaptered law: 'combined inverter output of up to 420 watts' and 'exceeding 420 watts, but no more than 1,200 watts, per service address, as long as each system is installed by an electrician licensed in the State'. Enacts 35-A MRSA ยง3475. Effective date is the general non-emergency date (90 days after 2026-04-29 adjournment) per the Legislature's 2026 digest: https://legislature.maine.gov/doc/12558. Some secondary sites misstate it as 90 days after signing.