Is balcony (plug-in) solar legal in Massachusetts?
Not yet. H.5175 / S.3143 (energy affordability bill) is moving through the legislature. Passed the House (Feb 26, 2026) and the Senate in a different version (Jul 1, 2026). In conference committee since Jul 16, 2026. Until a law takes effect, your utility's normal rules for connecting solar apply.
Massachusetts law
Bill movingState law: not yet. A bill is moving through the legislature.
- Bill
- H.5175 / S.3143 (energy affordability bill)
- Progress
- Passed the House (Feb 26, 2026) and the Senate in a different version (Jul 1, 2026). In conference committee since Jul 16, 2026.
Pending bill, not law. The governor may request changes before signing.
What the bill would do if signed
Senate version (S.3166, section 82, new G.L. c. 164 § 142); the final bill may differ
- Certification
- Certified by UL or an equivalent nationally recognized testing laboratory (§ 142(a))
- Landlord
- No person may unreasonably prohibit installing or using a device (§ 142(h)). A tenant is liable for damage only for documented gross negligence or intentional misuse, and the landlord carries the burden of proof (§ 142(j)).
- HOA
- A covenant or restriction that unreasonably prohibits or restricts a device is void (§ 142(i)).
- Tell your utility?
- Notify the utility within 30 days on a state form (service address, inverter capacity, compliance statement); the utility can't deny a compliant system or require approval, an interconnection agreement, fees or extra equipment (§ 142(e)–(f)).
- Export credit
- Can't be used for net metering (§ 142(d)).
- Also
- No wattage cap in this text. A system of up to 391 W is exempt from listing rules that would require changes to wiring or panels (§ 142(c)).
Read in the bill text: malegislature.gov
Federal bill, not law
The federal bill: H.R. 10851
H.R. 10851, the Socket Full of Sunshine Act, was introduced in the House by Rep. Rob Menendez (D-NJ-8) on Oct 19, 2026 and referred to the Committee on Energy and Commerce. It has no cosponsors and has not passed the House or the Senate.
If it became law, it would require every state to consider rules for plug-in solar devices of up to 1,200 W, such as dropping interconnection agreements and utility approval, fees, insurance and extra equipment. Considering is not adopting: even if it passes, it would not make plug-in solar legal in Massachusetts by itself.
It would also offer grants to states that set up rebate programs for low- and moderate-income households. None of this exists unless the bill passes, and even then a rebate in Massachusetts would depend on the state applying for a grant.
Sources: H.R. 10851 on congress.gov (status), the introduced text (govinfo.gov). Status checked .
More about plug-in solar in Massachusetts
What would H.5175 / S.3143 (energy affordability bill) do if signed?
Pending bill, not law. Senate version (S.3166, section 82, new G.L. c. 164 § 142); the final bill may differ. If signed, it would set: Certification: Certified by UL or an equivalent nationally recognized testing laboratory (§ 142(a)); Landlord: No person may unreasonably prohibit installing or using a device (§ 142(h)). A tenant is liable for damage only for documented gross negligence or intentional misuse, and the landlord carries the burden of proof (§ 142(j)); HOA: A covenant or restriction that unreasonably prohibits or restricts a device is void (§ 142(i)); Tell your utility: Notify the utility within 30 days on a state form (service address, inverter capacity, compliance statement); the utility can't deny a compliant system or require approval, an interconnection agreement, fees or extra equipment (§ 142(e)–(f)); Export credit: Can't be used for net metering (§ 142(d)); Also: No wattage cap in this text. A system of up to 391 W is exempt from listing rules that would require changes to wiring or panels (§ 142(c)).
How much would a plug-in solar kit save in Massachusetts?
It depends on which way the panels face, their tilt, how much of the power your home uses as it is made, and your utility's rate. The average residential electricity price in Massachusetts was 30.4¢/kWh (our 12-month average of EIA data, Aug 2025–Jul 2026). The calculator on canipluginsolar.com models it hour by hour for your address.
Before you buy a kit in Massachusetts
Neighboring states
Planning a kit in Massachusetts? Get your step-by-step checklist, from the law's own wording.
Renting in Massachusetts? Write a letter to your landlord, matched to Massachusetts's rules.