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.

Residential energy storage systems in Connecticut

Which codes apply? In Connecticut, residential energy storage systems fall under the 2020 NEC, the 2021 IRC, the 2021 IFC, and the 2020 NFPA 855 through the fire code.

Wall or floor units at a one- or two-family home, about 5 to 20 kWh each, up to 80 kWh in a garage or outdoors. State record read Oct 24, 2026. Data as of Oct 26, 2026.

Codes that reach residential energy storage systems

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

  1. NECNational Electrical Code
    2020 NECVerified

    in force since Oct 1, 2022

    Where it reaches the product. Article 706, energy storage systems, with 705 for the interconnection and 710 for stand-alone operation.

    2022 Connecticut State Building Code (electrical, 2020 NFPA 70) · Conn. Gen. Stat. 29-252 and 29-252b; 2022 Connecticut State Building Code (CSBC)

    The 2023 NEC is proposed.

    The Connecticut NEC record
  2. IRCInternational Residential Code
    2021 IRCVerified

    in force since Oct 1, 2022

    Where it reaches the product. Section R328, stationary storage battery systems in dwellings.

    2022 Connecticut State Building Code · Conn. Gen. Stat. 29-252 and 29-252b; 2022 CSBC

    The 2024 IRC is proposed.

    The Connecticut IRC record
  3. IFCInternational Fire Code
    2021 IFCVerified

    in force since Oct 1, 2022

    Where it reaches the product. Chapter 12, energy systems, section 1207, which also points to NFPA 855.

    2022 Connecticut State Fire Safety Code (Part III) and 2022 State Fire Prevention Code · Conn. Gen. Stat. 29-292 and 29-292a (fire safety code); 29-291 and 29-291e (fire prevention code)

    The 2024 IFC is proposed.

    The Connecticut IFC record
  4. NFPA 855NFPA 855, Standard for the Installation of Stationary Energy Storage Systems
    2020 NFPA 855Verified

    in force since Oct 1, 2022 · Through NFPA 1, chapter 52 · Edition derived from the fire code the state adopts

    Where it reaches the product. Chapter 15, one- and two-family dwellings and townhouses.

    2022 Connecticut State Fire Prevention Code (based on NFPA 1, 2021 edition) · Conn. State Fire Prevention Code (2022)

    The 2023 NFPA 855 is proposed.

    The Connecticut NFPA 855 record

Connecticut laws that name residential energy storage systems

Statutes, rules, and commission orders are tracked state by state.

No Connecticut law or rule on the site names residential energy storage systems. The product page shows the states that have one.

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