BESS facilities bring dangerous risks

Electrical & Mechanical Risks

Environmental, Fire & Explosion Risks

Electrical & Mechanical Risks

Overcharging / overvoltage
Over-discharging
External short circuits / wiring faults / connector failures
Internal short circuits (dendrites, separator failure)
Ground faults / insulation breakdown
Arc flash / high-energy discharge events
Inverter / PCS failure
Protection system failure / backfeed into grid
Impact / vibration / seismic damage
Crushing, penetration, or deformation
Structural failure (racks, containers)
Transport damage / installation errors

Thermal Risks

Environmental, Fire & Explosion Risks

Electrical & Mechanical Risks

Overheating / hot spots
Thermal runaway (cell → module → system)
Cooling system failure (HVAC / liquid)
High ambient temperature exposure
External fire exposure
Thermal gradients across modules

Environmental, Fire & Explosion Risks

Environmental, Fire & Explosion Risks

Toxic & Hazardous Emissions & Chemical Risk

Cell/module ignition
Jet flames / torching / pool fires
Gas deflagration or detonation (confined spaces)
Fire spread between modules or containers
Re-ignition after suppression
Air pollution (toxic gases, particulates)
Soil and groundwater contamination
Firefighting runoff contamination
Hazardous waste generation / long-term site contamination

Toxic & Hazardous Emissions & Chemical Risk

System Level Risks & High Consequence / Low Frequency Risk

Toxic & Hazardous Emissions & Chemical Risk

Hydrogen fluoride (HF)
Carbon monoxide (CO)
Volatile organic compounds (VOCs)
Hydrogen / methane release
Oxygen depletion in confined spaces
Electrolyte decomposition or leakage
SEI layer breakdown / lithium plating / dendrite growth
Contamination during manufacturing
Off-gassing (flammable/toxic gases)

Pressure, Gas, Aging & Degradation Risks

System Level Risks & High Consequence / Low Frequency Risk

System Level Risks & High Consequence / Low Frequency Risk

Gas buildup / vent failure
Overpressure events
Rupture of cells/modules
Confined-space explosion
Capacity fade / increased internal resistance
Higher likelihood of internal shorts
Seal degradation → leakage
End-of-life instability

System Level Risks & High Consequence / Low Frequency Risk

System Level Risks & High Consequence / Low Frequency Risk

System Level Risks & High Consequence / Low Frequency Risk

Cascading failure (cell → module → rack → system)
Containerized system hazards
Detection system failure (gas, smoke, temperature)
Fire suppression system failure
BMS / software / control system failure
Communication failures between subsystems
Multi-container or facility-level explosion
Grid instability or cascading outage
Community evacuation
Critical infrastructure damage

Human Safety & Emergency Response Risks

Installation, Design, External & Site Risks

Installation, Design, External & Site Risks

Electric shock / arc flash injuries
Thermal burns / chemical burns (HF exposure)
Blast injuries / projectiles
Smoke / toxic gas inhalation
Delayed hazard during overhaul (reignition)
Fire suppression challenges
High water demand / limited agent effectiveness
Long-duration fires / re-ignition risk
Extended monitoring or controlled burn requirement

Installation, Design, External & Site Risks

Installation, Design, External & Site Risks

Installation, Design, External & Site Risks

Improper system design / spacing / separation
Poor ventilation / fire protection design
Non-compliance with codes or standards
Incorrect electrical configuration
Flooding / water ingress
Earthquakes / lightning strikes
Extreme temperatures
Nearby fire exposure
Proximity to populated areas or critical infrastructure

Operational, Logistics & Lifecycle Risks

Installation, Design, External & Site Risks

Operational, Logistics & Lifecycle Risks

Maintenance errors / sensor failures / calibration errors
Overloading / misuse
Data monitoring failures
Manufacturing defects / counterfeit cells
Damage during shipping / storage issues
Decommissioning hazards / recycling or disposal risks