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 Wisconsin

Which codes apply? In Wisconsin, residential energy storage systems fall under the 2023 NEC, the state’s own code in place of the IRC, NFPA 1 in place of the 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 25, 2026. Data as of Oct 26, 2026.

Codes that reach residential energy storage systems

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

  1. NECNational Electrical Code
    2023 NECVerified

    in force since Sep 1, 2026

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

    Wisconsin electrical code (ch. SPS 316) · Wis. Admin. Code ch. SPS 316 (NEC edition listed in s. SPS 316.007(1)(a)); Clearinghouse Rule CR 26-016 (Register June 2026 No. 846)

    The Wisconsin NEC record
  2. IRCInternational Residential Code
    State’s own codeVerified

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

    Wisconsin Uniform Dwelling Code (UDC) · Wis. Admin. Code chs. SPS 320-325

    The next IRC edition is in development.

    The Wisconsin IRC record
  3. IFCInternational Fire Code
    Another model codeVerified

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

    Wisconsin Fire Prevention Code (ch. SPS 314, NFPA 1) · Wis. Admin. Code ch. SPS 314

    The 2024 IFC is in development.

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

    in force since Sep 1, 2025 · Through the IFC, chapter 12 · Edition derived from the fire code the state adopts

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

    Wisconsin Commercial Building Code, which applies 2021 International Fire Code section 1207 to commercial buildings · Wis. Admin. Code SPS 361.03(14)

    The 2023 NFPA 855 is in development.

    The Wisconsin NFPA 855 record

Wisconsin laws that name residential energy storage systems

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

Law or ruleKindStageDateWhat it does
Wis. Admin. Code ch. SPS 316News release on the 2023 electrical codeCode amendmentPartialIn forceSep 1, 2026Adopts the 2023 National Electrical Code with state changes for electrical work from Sep 1, 2026, replacing the 2017 edition. Source (opens in a new tab)
Wis. Admin. Code ch. NR 673Universal waste pageRulePartialIn force–Lets handlers manage hazardous waste batteries, such as lithium and lead-acid batteries, under the universal waste rules in ch. Source (opens in a new tab)

Every Wisconsin law on residential energy storage 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