The energy storage industry has crossed a threshold that fundamentally changes how we must think about security. Global battery energy storage system (BESS) installations reached approximately 315 GWh in 2025, representing a 50% year-on-year surge, with grid-scale projects accounting for nearly 240 GWh of that total. By 2026, industry forecasts project new operational capacity to exceed 450 GWh, underpinned by over 150 giga-scale projects in the pipeline. In parallel, the U.S. EIA projects utility-scale BESS capacity in the United States alone to rise from 45.6 GW at the close of 2025 to 65.6 GW by the end of 2026 — more than doubling total installed capacity since 2024.
This is no longer a niche or experimental technology. BESS is now critical infrastructure — backbone support for power grids, AI data centers, industrial electrification, and renewable energy integration. And like every other form of critical infrastructure, it carries security obligations proportional to its scale and strategic importance.
The question is no longer whether to take energy storage security seriously. The question is how comprehensively, and through what framework, we view it.
Dimension 1: The Electrochemical Safety Reality
The Incident Record in Context
The thermal runaway risk profile of BESS has improved dramatically over the past decade, but it has not been eliminated. According to EPRI’s BESS Failure Incident Database, the failure rate dropped by 99% from 2018 to 2025 as lessons from early failures were incorporated into modern designs and best practices. The Solar Energy Industries Association (SEIA) reports a 98% decline in the BESS failure rate from 2018 to 2024, even as deployment grew by over 25,000%. In 2025, the instances of fire per GWh deployed reached an all-time low, falling from over 1 in 2018 to just 0.03.
These statistics tell an encouraging story — but they must be held alongside a sobering counterpoint: 72% of BESS failures occur within the first two years of installation, and approximately 72% of BESS manufacturing defects occur at the system level. As deployment volumes explode, even a low failure rate per GWh translates into an increasing absolute number of incidents globally.
The Moss Landing Wake-Up Call
On January 16, 2025, a fire broke out at Vistra’s 300 MW / 1,200 MWh Phase I BESS plant at Moss Landing, California — one of the world’s largest battery storage facilities at the time. The incident resulted in a 24-hour evacuation of approximately 1,200 residents, destroyed 55% of the batteries, and caused soil contamination near the adjacent Elkhorn Slough National Estuarine Reserve at nickel, cobalt, and manganese concentrations roughly 100 to 1,000 times higher than normal. Full recovery and decommissioning was estimated to take over 12 months.
The WECC report on the incident identified a critical lesson: Moss Landing was built before the first fire safety standard for energy storage systems (NFPA 855) was released. Most new BESS facilities have since adopted outdoor containerized designs, specifically to contain thermal runaway conditions and prevent the building-scale cascade that occurred at Moss Landing.
The Root Cause Anatomy
Understanding security requires understanding failure origins. EPRI’s root cause analysis categorizes BESS failures across five origins: design defects, manufacturing defects, integration/assembly errors, operational errors, and combinations thereof. The WECC best practices framework calls on operators to:
- Select appropriate cell chemistry for operational needs
- Implement proven thermal management system (TMS) designs
- Establish safe operating parameters including maximum State of Charge (SOC) limits
- Create emergency response plans and conduct fire rehearsals with first responders
The EPA explicitly notes that lithium battery fires present unique challenges: they are extremely difficult to extinguish, may reignite hours or days later, and release harmful gases posing health risks to nearby residents and first responders. This is not a problem that resolves itself — it requires engineered countermeasures at every layer.
Dimension 2: Grid Reliability — The Systemic Risk Horizon
Physical fire safety is visible and intuitive. Grid systemic risk is subtler but potentially more consequential at scale.
ERCOT’s analysis of two widespread BESS loss events in the Western Interconnection — in March and April 2022 — was the first major evidence that BESS carries systemic reliability risks analogous to solar PV inverter-based resources. In both events, BESS facilities experienced partial plant tripping caused by inverter protection failures during normally cleared single-line-to-ground faults. In one Category 0 event in 2024, a BESS went from producing to consuming power — a total change of -514 MW — in a single grid event.
As grid-scale BESS grows toward hundreds of gigawatts, these inverter-side failure modes represent a systemic threat: a correlated mass trip of BESS resources during a grid disturbance could amplify rather than stabilize the fault. The 2026 PV & ESS Safety Industry Summit in Munich, organized by Huawei Digital Power , identified four major industry challenges: thermal-runaway boundary breakdown, high-voltage insulation failure, grid disturbance, and a lack of digitalization. Grid-Forming (GFM) capability — allowing BESS to provide synthetic inertia and fault ride-through — is increasingly recognized as not just a performance feature but a safety requirement for grid stability at scale.
Dimension 3: Cybersecurity — The Invisible Attack Surface
As BESS systems become increasingly networked — with cloud-connected BMS, remote EMS platforms, and integration into smart grid architectures — they become attractive targets for cyber and cyber-physical attacks. Energy storage systems are “becoming an essential part of the power grid of the future, making them a potential target for physical and cyberattacks,” as Sandia National Laboratories noted in its ESS security analysis.
The interconnection of BESS with SCADA systems, IoT sensors, and grid automation platforms creates an extended attack surface. A compromised BMS could be used to induce thermal runaway remotely, manipulate State of Charge readings to degrade asset performance, or disable fire suppression systems at a critical moment. Research on cyber-physical attacks on energy systems highlights that intrusion detection, encryption, and access controls remain the frontline defenses — but these must be actively designed in, not bolted on after deployment.
The 2026 Grid-Forming ESS Safety White Paper, released at the Munich summit, specifically called for a Digital Trust Model — an approach where safety and security are treated as full-lifecycle, closed-loop obligations covering design, manufacturing, and operations. This represents a fundamental shift from episodic compliance to embedded security culture.
Dimension 4: Supply Chain Security — The Geopolitical Fault Line
Energy storage security cannot be discussed without confronting the critical minerals question. Lithium, cobalt, nickel, manganese, and graphite — the foundational materials of lithium-ion BESS — are characterized by extreme geographic concentration. China dominates both mining and processing across most of these minerals, creating structural supply chain vulnerabilities that have escalated into a major geopolitical flashpoint.
The IEA estimates that achieving net-zero globally by 2050 will require six times more critical minerals in 2040 than current consumption levels. In 2026, the IEA’s critical minerals declaration formally reclassified these materials as strategic national security assets, triggering a global scramble for equity stakes in mining operations. The U.S. has committed $15 billion in Export-Import Bank letters of interest, $7 billion in Department of Energy loans, and $2.8 billion in Pentagon equity and debt to secure critical mineral supply chains.
For the BESS industry, supply chain security translates into three practical imperatives:
- Diversification: reducing dependence on single-country sourcing for key materials
- Quality traceability: ensuring that BESS components manufactured across global supply chains meet documented quality standards — the CEA Market Intelligence report found that 72% of BESS defects occurred at the system level
- Domestic processing capacity: investing in cell manufacturing closer to deployment markets to reduce geopolitical exposure and logistics risk
India’s own BESS ambitions are directly shaped by these supply chain realities. Building a resilient domestic energy storage sector requires not just installation targets but a coherent minerals strategy aligned with the country’s broader energy security objectives.
Dimension 5: Lifecycle Safety — The Underappreciated Frontier
Most safety discourse focuses on the operational phase. But energy storage security spans the entire lifecycle — from cell manufacturing and transportation through commissioning, operation, decommissioning, and recycling.
The decommissioning and end-of-life phase is growing urgently in importance. As BESS systems installed during the early wave of the 2010s approach end of life, the industry faces a significant challenge: degraded lithium-ion batteries retain substantial stored energy and thermal runaway potential. Without established protocols, the recycling and disposal of damaged batteries create new safety and environmental risks.
The World Bank’s June 2026 publication Enhancing Safety in Battery Energy Storage Systems specifically highlights lifecycle safety as a priority area for developing country regulators and project developers. A whole-project approach to safety — covering development and planning, deployment and commissioning, operation and maintenance, and decommissioning — is the recommended standard.
The Regulatory Landscape: From Voluntary to Mandatory
The transition from voluntary best practice to mandatory regulation is now firmly underway globally. This shift is the clearest institutional signal that energy storage has reached critical infrastructure status.
Global Standards Evolution
India’s CEA 2026 BESS Safety Regulations
India’s Central Electricity Authority (CEA) notified the Safety and Electric Supply Amendment Regulations in 2026, introducing a dedicated Chapter XA for BESS installations operating above 650 volts. Key mandates include:
- Two-fault tolerance design: systems must remain safe even under two simultaneous independent failures
- Continuous BMS monitoring: voltage, temperature, thermal runaway, and current at all levels, with automatic alarms and shutdowns
- Fire hazard detection and suppression: hazard detection systems for smoke, gas, heat, and flame; automatic suppression in every battery container
- Physical security: minimum 1.8-metre fencing, CCTV, motion sensors, and alarm systems
- Independent fire safety audit within three months of regulations coming into force, submitted to the Electrical Inspector
- Training of fire safety personnel in battery-specific risk handling
This framework, effective April 1, 2027, gives Indian developers and operators a defined compliance horizon — and represents the most comprehensive BESS safety regulation India has yet published.
The Insurance and Finance Signal
The market is already pricing energy storage security risk. According to kWh Analytics’ 2025 Solar Risk Assessment, concern around BESS safety has risen sharply following recent fire incidents, even as the overall incident rate has declined. Insurers are migrating toward a “design as risk control” paradigm — quantifying risk probability multiplied by loss severity to build a three-dimensional defense mechanism across physical, financial, and environmental dimensions.
For developers and asset owners, this means that security investment is not a cost center — it is a capital efficiency driver. Projects designed to exceed safety standards will attract better insurance terms, lower financing costs, and greater investor confidence. As one Willis Towers Watson senior director put it at the Munich summit, the insurance industry must move toward quantifying risk in a closed-loop framework covering design, construction, and operations.
Conclusion: Security as the Enabler of Scale
The central insight that should guide the industry’s approach to energy storage security in the large-scale development era is this: security is not a constraint on growth — it is the condition for it.
The SEIA reports zero documented cases of air, soil, or water contamination requiring remediation across 35 major U.S. BESS fires from 2012 to 2024 — a testament to the progress achieved through modern safety standards and engineering practices. Yet the same data set reflects incidents that generated significant community opposition, regulatory scrutiny, and project delays that have collectively affected the entire industry’s deployment pipeline.
Every preventable incident damages not just the affected asset, but the social license, regulatory environment, and financing conditions for BESS globally. Conversely, a sector that demonstrably manages its security risks across all five dimensions — electrochemical safety, grid reliability, cybersecurity, supply chain integrity, and lifecycle responsibility — earns the trust necessary for the terawatt-scale deployment that the clean energy transition demands.
The energy storage industry in 2026 stands at an inflection point: the technology is proven, the economics are compelling, and the deployment pipeline is massive. Whether this potential is fully realized will depend, in no small part, on whether the sector treats security not as a compliance checkbox, but as the core engineering and strategic discipline it has always been.
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