The Smarter Way to Store Lithium Batteries

Article Summary

Lithium-ion battery storage has rapidly emerged as a critical risk and compliance challenge across industries such as manufacturing, logistics, and data centers. As adoption accelerates, organizations face a growing gap between real-world fire behavior—marked by thermal runaway, toxic gas release, and re-ignition risk—and evolving, often inconsistent regulatory frameworks. This disconnect has created a fragmented landscape where local fire codes vary widely, enforcement is subjective, and compliance alone no longer guarantees safety or insurability. Increasingly, both regulators and insurers are shifting focus toward risk-based strategies that prioritize containment, separation, and mitigation of worst-case thermal events rather than minimum code adherence.

In response, insurers and industry bodies are playing a defining role in shaping best practices, leveraging fire testing data and loss analysis to push for more robust storage and handling approaches. Updates like the 2024 International Fire Code signal progress, introducing clearer thresholds and safety requirements, yet adoption remains uneven. Forward-looking organizations are moving beyond reactive compliance by implementing engineered containment solutions, aligning with emerging standards, and proactively engaging authorities having jurisdiction (AHJs). This shift reflects a broader industry consensus: resilient lithium battery storage strategies must be grounded in performance-based design, validated testing, and real-world risk reduction.

Ultimately, as lithium-ion battery use expands across high-value and mission-critical environments, companies that invest in proactive, data-driven storage solutions are better positioned to reduce fire risk, maintain operational continuity, and meet the rising expectations of insurers and regulators. In an uncertain regulatory environment, early adoption of engineered safety measures is not just a compliance strategy—it is a competitive advantage in safeguarding people, property, and long-term business viability.

Lithium Battery Storage Is a Growing Challenge, and the Rules Still Aren’t Clear

Lithium-ion batteries now power a wide range of industrial and commercial applications, from electric vehicles and robotics to data centers and consumer electronics. As their use has expanded, so have the potential risks associated with storing them indoors. Manufacturers, logistics teams, safety professionals, fire officials, and insurers are increasingly focused on one shared challenge: how to store lithium batteries in a way that meaningfully reduces fire risk while navigating an evolving and often unclear regulatory landscape.

Unlike conventional fires, lithium battery incidents involving thermal runaway produce extreme heat, toxic gases, and the potential for re-ignition long after the initial event appears to be controlled. These characteristics make battery fires difficult to suppress and predict, particularly in enclosed warehouse or manufacturing environments. As a result, lithium battery fire safety has become a central concern across industrial operations.

Complicating matters further, fire codes and regulations have struggled to keep pace with how batteries are actually stored and staged in real-world facilities. While new guidance is emerging, adoption varies widely, leaving many organizations operating in a gray area where compliance requirements are ambiguous but risk exposure is very real. The National Fire Protection Association has documented a growing number of lithium-ion battery–related fires in industrial, recycling, and storage environments, reinforcing the importance of proactive risk mitigation rather than reliance on minimum compliance alone.

In response, insurers are paying closer attention not just to whether facilities meet local code, but to how well storage strategies reflect the real behavior of lithium battery fires. Approaches that emphasize containment, separation, and control of thermal events are increasingly shaping expectations across the industry.

Why Lithium Battery Storage Rules Vary by Location, and Why That Creates Risk

One of the core challenges in lithium battery storage is regulatory inconsistency. Fire codes are fragmented, unevenly adopted, and often silent on common industrial use cases. For many years, regulatory focus centered primarily on stationary energy storage systems, leaving electric vehicle packs, robotics batteries, and loose battery modules in warehouses largely unaddressed.

The International Fire Code (IFC), published by the International Code Council, only becomes enforceable when adopted by a state or local jurisdiction. Many regions still operate under older editions of the code, and when lithium battery storage is not explicitly covered, enforcement often falls to the discretion of the authority having jurisdiction (AHJ). This can lead to vastly different interpretations of acceptable storage conditions for identical scenarios, depending solely on location.

Research sponsored by the Fire Protection Research Foundation’s Property Insurance Research Group has examined the unique hazards associated with lithium-ion battery storage, particularly in bulk storage and distribution environments. This work recognizes that lithium batteries behave differently than traditional commodities in fire scenarios and require tailored protection strategies.

Multi-site manufacturers frequently encounter conflicting guidance from local fire officials. Facilities using the same storage configuration may receive approval in one jurisdiction and rejection in another, not because the underlying risk differs, but because interpretation does. For this reason, many organizations are beginning to move beyond asking only what the local code allows and instead adopting defensible, risk-based storage strategies that can be explained and justified to both regulators and insurers.

How Insurance Providers Are Influencing Lithium Battery Storage Practices

Insurance companies have become one of the most influential forces shaping lithium battery storage standards. Rather than waiting for every jurisdiction to adopt the latest fire code updates, insurers rely on loss data, fire testing, and real-world incident analysis to inform underwriting decisions.

FM Global, one of the world’s largest commercial property insurers, has conducted extensive large-scale fire testing related to lithium-ion batteries stored in warehouses. This research has helped demonstrate why these products present distinct hazards and why traditional fire protection approaches may be insufficient without additional mitigation.

As a result, insurers are increasingly asking detailed questions about battery quantities, charging conditions, separation distances, suppression capabilities, and containment strategies. In many cases, they recommend or require additional protective measures even when local fire codes do not explicitly mandate them.

Battery charging and staging areas illustrate this gap clearly. While some facilities classify these areas as temporary storage and therefore exempt from certain code provisions, insurers often view charging as a higher-risk condition that warrants enhanced protection. In these situations, a facility may technically comply with code but still face insurance limitations or higher premiums.

This dynamic has led many risk professionals to favor storage approaches that can demonstrably limit fire propagation and reduce potential loss severity, particularly strategies designed to manage a thermal runaway event rather than simply respond after one occurs.

What the 2024 Fire Code Clarified About Lithium Battery Storage

The 2024 edition of the International Fire Code represents a significant step forward in addressing lithium-ion battery storage beyond stationary energy storage systems. For the first time, the code establishes clearer expectations for indoor battery storage in manufacturing and warehouse environments.

Section 320 introduces defined thresholds that trigger permitting, fire safety planning, and suppression requirements. One notable update is the 15-cubic-foot storage threshold, which in many industrial settings can be exceeded by a single electric vehicle battery pack. The code also introduces a two-hour fire barrier requirement unless batteries are stored in approved containers capable of mitigating a thermal event.

Although adoption of the 2024 IFC will take time, many organizations are already using it as a proactive benchmark. Some facilities have worked with local fire departments to classify battery staging during production as temporary storage, while implementing tested containment strategies to address worst-case fire scenarios. This approach has allowed them to avoid extensive building modifications while still satisfying both regulatory and insurance concerns.

Additional context on lithium-ion battery containment approaches used in industrial environments can be found through engineered hazmat containment solutions designed specifically for thermal event mitigation.

Beyond Compliance: Reducing the Risks Insurers and Regulators Care About

Meeting code requirements is increasingly viewed as a baseline rather than a comprehensive solution. Meaningful risk reduction depends on understanding how lithium batteries fail and designing storage systems that address those failure modes directly.

The U.S. Environmental Protection Agency has documented the environmental and public safety impacts of large-scale lithium-ion battery fires, including incidents that required prolonged response efforts, environmental monitoring, and evacuation planning. These case studies underscore the importance of limiting fire spread, controlling heat release, and preventing secondary ignitions.

Engineered storage approaches are often evaluated based on objective performance criteria, such as flame retention, fragment containment, surface temperature limits, and resistance to re-ignition. When these characteristics are supported by testing and documentation, approving authorities and insurers can rely on data rather than subjective judgment.

In practice, some facilities storing damaged or defective batteries have avoided constructing dedicated two-hour fire-rated rooms by implementing containment strategies that demonstrate equivalent protection. In these cases, insurers and fire officials have supported alternative approaches when the risk reduction was clearly documented and proven.

Smarter Lithium Battery Storage in an Uncertain Regulatory Landscape

Lithium battery storage is no longer a niche concern. It affects manufacturers, warehouses, data centers, and any operation handling modern energy systems. The challenge lies not only in the hazard itself, but in the fragmented and evolving regulatory environment surrounding it.

As lithium battery fire incidents continue to increase, insurers, fire officials, and regulators are converging on a shared conclusion: facilities that adopt proactive, engineered storage strategies are better positioned to protect people, property, and business continuity.

Rather than waiting for regulations to catch up, many organizations are choosing to engage early with fire authorities, align with emerging code intent, and implement storage approaches grounded in real-world fire behavior. In an environment where rules remain uneven and interpretations vary, informed decision-making today can provide resilience against scrutiny tomorrow.