One in four BESS units ‘have defects in their fire suppression systems’

February 16, 2024

A total of 26 per cent of battery energy storage system (BESS) units have defects in their fire suppression systems, according to a new study.

The research – conducted by North American advisory company Clean Energy Associates – also found that 18 per cent of BESS units had thermal management system defects.

“Fire suppression and thermal management systems are critical for functional safety, and defects in these systems can lead to increased risk of fire,” the study said.

Common fire suppression system failings, according to the report, included:

  • Non-responding release actuator for the fire extinguishing agent
  • Fire alarm abort button was not functional
  • Non-responding smoke & temperature sensors

With regard to thermal management system defects, common failings included “circulation system components failure” and short circuiting of compressor mainboards.

Other common BESS defects cited in the report included:

  • AC/DC power distribution (16 per cent)
  • DC combiner panel (11 per cent)
  • Strength and rigidity (14 per cent)
  • Capacity test (12 per cent)

For more information on the findings of the study, click here