Plug-in solar in Massachusetts
Bill active Checked November 10, 2026
Massachusetts has plug-in solar language inside a large energy bill, H.5175. The House version allows devices up to 1,200 watts; the Senate version adds plug-in batteries and tenant and covenant protections. The two chambers sent the bill to a conference committee on July 16, 2026.
Bills
| Bill | Stage | Last action | Dates |
|---|---|---|---|
| H.5175 (Senate text S.3166) An Act relative to energy affordability, clean power and economic competitiveness | In conference committee | Committee of conference appointed (Cusack-Michlewitz-Jones; Barrett-Creem-Tarr) (July 16, 2026) |
The rules
Massachusetts has no enacted plug-in solar law. There are no state rules to list; your utility's interconnection rules apply.
What's next
Watch for a conference report. Both chambers must then accept it and the governor must sign before it becomes law.
What could it save?
For an 800 W panel kit at Massachusetts's average residential price of 30.39¢/kWh (September 2025 – August 2026 (12 months)):
- Ideal tilt (20°, south)
- 1,050 kWh a year: about $220 typical (69% used at home), up to $319 best case (100%)
- Vertical railing (90°, south)
- 738 kWh a year: about $155 typical (69% used at home), up to $224 best case (100%)
"Typical" uses HTW Berlin's model for an 800 W system without a battery; exports are assumed to earn nothing. Solar data: NREL PVWatts for Boston (capital). Try your own numbers · Is it worth it? · Railing vs tilted
Price source: EIA residential average, September 2025 – August 2026 (12 months).
Questions
Is plug-in solar legal in Massachusetts?
Massachusetts has no plug-in solar law yet, though a bill is pending. Without one, small plug-in systems fall under your utility's own interconnection rules. Ask your utility before you connect anything.
Neighbouring states
- Connecticut: Law in effect
- New Hampshire: Signed — details being verified
- New York: Bill active
- Rhode Island: Status not yet confirmed
- Vermont: Law in effect
Related: is it worth it? · railing vs tilted panels · renters guide · all kits · Certification watch · how we verify
Sources
- Massachusetts Legislature: H.5175 (194th General Court) bill history (Legislature bill page; accessed November 10, 2026)
- H.5175 bill text (House version) with portable solar generation device sections (Legislature bill page; accessed November 10, 2026)
- S.3166 (Senate version, as amended) with plug-in photovoltaic and battery system sections (Legislature bill page; accessed November 10, 2026)
This page is general information, not legal or electrical advice. Laws change and utilities differ. Check the linked official sources, your lease or HOA rules, and your utility before you buy or install anything. Full disclaimer.