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BETTESWORTHConstruction

How to Plan Lithium-Ion Battery Storage for Fire Safety and Code Compliance

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Lithium-ion battery storage needs fire-safety planning that matches the system, its setting, and the locally adopted code—not a one-size-fits-all layout. For a construction project, the practical starting point is to identify whether the installation is a stationary energy storage system (ESS) or another battery-storage use, then confirm the applicable code edition and coordinate system-specific fire protection and emergency planning with qualified professionals and the local fire authority.

What fire code applies to lithium-ion battery storage?

There is no single fire-code answer that applies to every U.S. project. Requirements depend on the jurisdiction, the code edition it has adopted, local amendments, the battery technology and use, the project setting, and the system’s size and configuration. A model code or standard is not automatically law everywhere: the authority having jurisdiction (AHJ)—often the local fire or building official—determines which adopted requirements apply and how they are enforced.

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For stationary energy storage installations, NFPA 855 is a central reference. NFPA lists a 2026 edition and describes criteria based on technology, installation setting, size and separation, and fire-protection and control systems. Its coverage includes subjects such as detection and suppression, explosion control, exhaust ventilation, gas detection, and thermal runaway. That summary is not a substitute for the standard’s complete requirements; project teams need the edition adopted locally and the relevant code text. See the NFPA 855 product page.

Other model-code provisions and state rules can also matter. The 2024 International Fire Code addresses electrochemical ESS protection in Section 1207.5, but a project should use the edition adopted by its jurisdiction and check for amendments. Texas’s State Fire Marshal likewise cautions that NFPA 855 may be mandatory or voluntary depending on facility location. Its battery energy storage FAQ discusses how protection provisions depend on system size and type.

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Newer provisions also address lithium-ion and lithium-metal batteries outside fixed ESS installations. Oregon’s 2025 Fire Code Executive Summary describes a new Section 320 for settings including manufacturing, warehouse operations, retail, collection, and recycling. New York’s 2025 Fire Code includes fire-safety planning and storage provisions for indoor and outdoor settings. These are examples of jurisdiction-specific developments, not nationwide rules. Consult the Oregon 2025 summary and the 2025 Fire Code of New York State for their respective contexts.

How is stationary ESS different from other battery storage?

A stationary ESS is an installation designed to store and supply energy at a fixed location. The broader category of lithium-ion battery storage includes batteries kept or handled for other purposes, such as manufacturing, warehousing, retail, collection, and recycling. Those activities may involve batteries that are not installed as an energy storage system, so an ESS-focused standard alone may not address every applicable fire-code provision.

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The distinction matters on construction and retrofit projects. A building may include a fixed energy storage installation and separately have batteries in storage, distribution, service, or recycling areas. Each use can present different questions about location, quantity or capacity, exposure to other occupancies, and emergency response. Oregon’s Section 320 example signals this broader regulatory scope; it does not establish that every jurisdiction has adopted the same provisions.

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Do not assume that the label “battery room,” “backup power,” or “warehouse storage” settles the applicable code path. Describe the actual activity and system to the code official: what is installed or stored, what the batteries support, where they are located, and how the space will be used. The AHJ and qualified design professionals can then determine which requirements apply.

How should a project team plan for battery fire safety?

Start with the code path and system information, before fixing a room layout or specifying a protection strategy. The sources identify detection, suppression, explosion control, ventilation, gas detection, thermal runaway, and emergency response as relevant planning subjects, but they do not support universal separation distances, capacities, or equipment designs. Those decisions require the adopted code, system-specific information, and qualified technical review.

  1. Define the installation and activity. Record whether the project involves a stationary ESS, batteries stored for another use, or both. Identify the battery technology, the intended function, indoor or outdoor location, and the operating context. Include manufacturing, warehousing, retail, collection, or recycling activities where relevant.
  2. Confirm the governing requirements. Ask the local fire and building officials which code editions, standards, and amendments apply. Verify the applicable jurisdiction and permitting process rather than relying on a generic reference to NFPA 855 or the latest model code. Keep a record of the official guidance and the editions used in design review.
  3. Gather system-specific hazard and test information. Assemble the manufacturer’s system documentation and relevant test information for the proposed equipment. EPA identifies NFPA 855 and UL 9540/9540A among relevant BESS standards; UL 9540 and UL 9540A relate to ESS equipment and testing, including fire-related test methods. Confirm current editions and how the information applies to the particular system. The EPA fact sheet on safe installation and incident response collects relevant planning and response resources.
  4. Coordinate the fire-protection concept. Have qualified professionals assess the code-required approach for detection and alarm, suppression, ventilation or exhaust, gas detection, and explosion control as applicable. The proper combination depends on the technology, setting, size, separation and exposure conditions, and the protection systems provided. Do not select a design by copying a detail from a different jurisdiction or project.
  5. Build emergency response into the plan. Coordinate response information and procedures with the local fire authority. New York’s 2025 code, for example, includes a fire-safety plan with response actions for detected or possible battery-storage fires. The exact obligations vary by jurisdiction, but response planning should be considered alongside the physical design rather than after installation.
  6. Resolve the plan through permitting and review. Submit the system description, design basis, supporting technical information, and required safety and response plans through the applicable review process. Address comments with the AHJ and design team, and keep the approved documents aligned with the installed system and its intended use.

Which design conditions can change the code analysis?

The same battery technology may be treated differently depending on where and how it is used. During early design, make the following conditions explicit; they help the AHJ and project professionals identify the applicable provisions and the information still needed.

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  • Technology and system type: Identify the battery chemistry or technology and whether it forms part of an installed ESS or is being stored or handled for another purpose. Do not treat all lithium-ion or lithium-metal batteries as interchangeable for code analysis.
  • Setting and occupancy: Establish whether the batteries are indoors or outdoors and describe the surrounding building uses and activities. Manufacturing, warehouse, retail, collection, and recycling operations are among the settings identified in Oregon’s 2025 code summary for newer battery-storage provisions.
  • Size, capacity, and arrangement: Provide the system’s actual proposed configuration and the data requested by the applicable code and AHJ. NFPA and Texas materials describe protection criteria that depend in part on installation size or system size and type; the available data does not establish universal thresholds.
  • Separation and exposure: Evaluate separation in the context of the adopted requirements, project conditions, and nearby exposures. Do not import a distance from a state code excerpt or another project as a general recommendation; New York’s detailed provisions and exceptions are specific to its code text.
  • Protection and response measures: Show how the proposed design addresses applicable detection, suppression, ventilation, gas detection, explosion control, thermal runaway, and emergency-planning topics. Not every item necessarily applies identically to every system; determine scope from the governing code and technical review.

How do emerging fire-code provisions affect projects?

The direction of code development is toward addressing more than fixed energy storage installations. NFPA 855 remains an important stationary ESS reference, while newer or revised fire-code provisions can reach battery storage in other settings and activities. This distinction matters to developers, owners, contractors, and operators planning projects that combine building construction with battery storage or handling.

Examples illustrate why edition and jurisdiction must be checked rather than presumed:

Reference What it covers in the source How to use it
NFPA 855 Stationary ESS installation; NFPA lists a 2026 edition and summarizes criteria tied to technology, setting, size and separation, and fire protection. Consult the complete edition applicable to the project and confirm local adoption and amendments.
2024 International Fire Code, Section 1207.5 Electrochemical ESS protection provisions. Use as a model-code reference only where relevant; verify the locally adopted edition and amendments.
Oregon 2025 Fire Code Executive Summary Describes new Section 320 for lithium-ion and lithium-metal battery storage in manufacturing, warehouse operations, retail, collection, and recycling. Apply only within Oregon’s code context and confirm the operative requirements with the AHJ.
2025 Fire Code of New York State Includes battery-storage fire-safety planning, response actions, and indoor and outdoor storage provisions. Read the New York text and its exceptions; do not treat its distances or provisions as universal.
Texas State Fire Marshal FAQ Explains that NFPA 855 can be mandatory or voluntary depending on location and discusses system-dependent protection topics. Use it for Texas context, then confirm the project’s specific location and requirements.

EPA’s 2025-revised fact sheet is useful as a starting point for BESS installation and incident-response resources, but it does not replace code review. Similarly, a standard’s publication date is not the same as its adoption date in a particular city, county, or state. For any active project, confirm the version currently enforced by the AHJ.

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Does NFPA 855 require fire detection or fire suppression?

That depends on the applicable requirements and the installation’s characteristics; the available source summary does not establish a universal answer for every ESS. NFPA describes criteria based on technology, setting, size and separation, and protection systems, while the Texas State Fire Marshal says detection and suppression provisions depend on system size and type. Review the complete locally applicable standard and code with the AHJ and qualified professionals.

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What should owners and contractors avoid?

The most consequential planning error is treating a generic checklist, a code excerpt from another state, or a vendor description as a site-specific design approval. A fixed separation distance or suppression arrangement quoted without its code context can be misleading. Another risk is evaluating only the installed ESS while overlooking batteries that will be stored or handled elsewhere on the site.

Keep the project record specific: the identified system and use, the adopted code editions and amendments, the technical information reviewed, the design decisions and their code basis, the fire-safety and response plans, and the AHJ review path. If the system, layout, or activity changes, revisit the code analysis. The available sources do not establish a single incident statistic or one universal design recipe, and they should not be used to infer either.

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For owners and project developers, early coordination can expose permitting and layout questions before they become construction changes. For contractors and operators, it helps ensure that installed conditions, intended use, and response documents remain consistent. For engineers and code officials, it provides a clear basis for reviewing a system against the applicable requirements rather than assuming that all battery installations fall under one rule set.

Frequently Asked Questions

Who is the authority having jurisdiction for a battery storage project?

The AHJ is the official or agency responsible for enforcing the applicable codes and reviewing the project, commonly a local fire or building authority. The responsible office can vary by location and project, so ask the permitting agency which officials must review the system.

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Are UL 9540 and UL 9540A the same kind of standard?

EPA’s fact sheet identifies both as relevant to BESS and describes them in relation to ESS equipment and testing, including fire-related test methods. They are not substitutes for the locally adopted fire code, and the applicable current editions and project-specific documentation should be confirmed.

Can a contractor use another state’s battery-storage fire code as a design template?

It can be useful for understanding the kinds of issues a jurisdiction may address, but it is not a substitute for the governing local code. Requirements, exceptions, adoption status, and amendments differ; ask the project’s AHJ to confirm the applicable text.

When should fire officials be involved in an ESS project?

Involve the local fire authority during planning, while the system, site arrangement, protection approach, and response plan can still be coordinated. Early discussion does not replace formal permitting or approval, but it can help identify what information the review will require.

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