Codes of Record

What applies to my job?

Pick the state and the product you build, install, or inspect. The card below answers from each state’s own record.

Solar PV in Massachusetts

Which codes apply? In Massachusetts, solar PV systems fall under the 2026 NEC, the 2021 IRC, the 2021 IBC, and another model code in place of the IFC.

Rooftop and ground-mounted photovoltaic arrays and their wiring. State record read Oct 18, 2026. Data as of Oct 26, 2026.

Codes that reach solar PV systems

The edition Massachusetts enforces for each code that governs the product, and the part of the code that does.

  1. NECNational Electrical Code
    2026 NECVerified

    in force since Apr 24, 2026

    Where it reaches the product. Article 690, solar photovoltaic systems, with 705 for the interconnection and 690.12 for rapid shutdown.

    Massachusetts Electrical Code (527 CMR 12.00), 2026 edition · 527 CMR 12.00

    The Massachusetts NEC record
  2. IRCInternational Residential Code
    2021 IRCVerified

    in force since Oct 11, 2024

    Where it reaches the product. Section R324, solar energy systems.

    Massachusetts Residential Code (780 CMR 51.00), Tenth Edition, Residential Volume · 780 CMR 51.00, s. R101.1

    The 2024 IRC is in development.

    The Massachusetts IRC record
  3. IBCInternational Building Code
    2021 IBCVerified

    in force since Oct 11, 2024

    Where it reaches the product. Rooftop structures and the structural load of the array.

    Massachusetts State Building Code, 780 CMR, Tenth Edition, Base Volume · 780 CMR (10th Edition Base Volume), s. 101.1

    The 2024 IBC is in development.

    The Massachusetts IBC record
  4. IFCInternational Fire Code
    Another model codeVerified

    Where it reaches the product. Chapter 12, section 1205, solar photovoltaic power systems and roof access.

    Massachusetts Comprehensive Fire Safety Code (527 CMR 1.00) · 527 CMR 1.00, ss. 1.04-1.05

    The 2024 IFC is proposed.

    The Massachusetts IFC record

Massachusetts laws that name solar PV systems

On the site: 13 laws, rules, orders, and bills, newest first.

Law or ruleKindStageDateWhat it does
225 CMR 28.00225 CMR 28.00 (SMART 3.0)Program rulePartialIn forceSep 11, 2026Pays solar incentives per kWh; systems of 25 kW AC or less get a flat $0.03 per kWh, or $0.06 for low-income customers. Source (opens in a new tab)
H.5641H.5641, 194th General Court (House Docket 6290)BillVerifiedPendingAug 4, 2026Proposes allowing Becket to adopt a six-month moratorium on large-scale solar and battery storage, excluding batteries accessory to individual residential use. Source (opens in a new tab)
225 CMR 29.00RulePartialIn forceJul 1, 2026Requires local governments to accept consolidated permit applications by Oct 1, 2026 for solar under 25 MW and storage under 100 MWh. Source (opens in a new tab)
H.5175H.5175, 194th General Court (House draft H.5151 as amended; Senate text S.3143)BillVerifiedPendingJul 1, 2026An earlier House draft, H.5151, proposed a statewide storage incentive program and a state permitting platform for home solar and storage. Source (opens in a new tab)
H.5294H.5294, 194th General CourtBillPartialDid not passJun 8, 2026Proposes a temporary moratorium on large ground-mounted solar and battery energy storage systems in the town of Worthington. Source (opens in a new tab)
527 CMR 12.00527 CMR 12.00 (Massachusetts Electrical Code, based on the 2026 NEC)Code amendmentPartialIn forceApr 24, 2026Requires installations permitted after Apr 24, 2026 to meet the 2026 National Electrical Code with Massachusetts amendments. Source (opens in a new tab)
H.3467H.3467, 194th General CourtBillPartialDid not passApr 6, 2026Proposes energy code rules requiring solar on new buildings, plus battery storage on new multifamily and commercial buildings up to six stories. Source (opens in a new tab)
H.4144H.4144, 194th General CourtBillPartialDid not passApr 6, 2026Proposes a statewide solar incentive program set by regulation, state clean energy procurement that includes storage, and a state siting and permitting division. Source (opens in a new tab)
ConnectedSolutions small-scale battery program detailsResidential battery program materialsProgram rulePartialIn forceMar 13, 2026Pays $275 per kW for behind-the-meter batteries of 50 kW or less that discharge during 30 to 60 summer peak events. Source (opens in a new tab)
Attorney General decision on the Town of Blandford's solar and battery storage moratoriumMunicipal Law Unit decisionAgency guidancePartialIn forceMar 11, 2026Disapproved the town's temporary moratorium on large ground-mounted solar and battery storage, so it never took effect. Source (opens in a new tab)
780 CMR 51.00Residential code chapter 3, tenth editionCode amendmentPartialIn forceOct 11, 2024Requires home energy storage to get building permits and inspections, follow the state electrical code, and have smoke and carbon monoxide alarms. Source (opens in a new tab)
St. 2024, c. 239, § 23St. 2024, c. 239, § 23 (G.L. c. 25A, § 21)StatutePartialIn force–Local governments must decide consolidated permits for solar under 25 MW and storage under 100 MWh within 12 months. Source (opens in a new tab)
St. 2024, c. 239, § 74St. 2024, c. 239, § 74 (G.L. c. 164, §§ 69T-69W), with definitions in §§ 50-58 (G.L. c. 164, § 69G)StatutePartialIn force–Requires large clean energy facilities, including storage of 100 MWh or more, to get one consolidated permit from the Energy Facilities Siting Board. Source (opens in a new tab)

Every Massachusetts law on solar PV systems, with filters

For information only. Your local building or fire official decides which code applies. We check state records often but can miss a recent change, so confirm with your official before you design, permit, or install. Terms of use