Is it true that lithium batteries are susceptible to fire?

 

It’s a common misconception that all “lithium batteries” simply catch fire. Different lithium chemistries behave very differently. For solar applications LBSA uses Lithium Iron Phosphate (LiFePO4), which is far less prone to thermal runaway, swelling or combustion than some other lithium-ion chemistries. That said, most fire incidents in solar installations are caused by installation and system faults—loose connections, improper DC/AC wiring, poor cable sizing, inadequate protective devices, or incorrect system configuration—rather than the battery cells themselves.



Why LiFePO4 is the preferred chemistry for solar

LiFePO4 cells are chemically stable and have a higher thermal tolerance compared with many other lithium-ion types. They are less likely to enter thermal runaway, and they do not off-gas or swell to the same extent as some high-energy chemistries. For these reasons LiFePO4 is widely used in residential, commercial and industrial energy storage.



What typically causes fires in solar & battery systems?

  • Poor connections / loose terminals: DC arcing from poorly tightened or corroded terminals is a common ignition source.
  • Incorrect cable sizing or protection: undersized conductors and missing/incorrect fusing can cause overheating.
  • Faulty or incompatible inverters / charge controllers: misconfigured devices can create undesirable electrical states.
  • Lack of proper isolation and earthing: inadequate earthing and missing DC isolators increase risk during faults.
  • Poor ventilation / thermal management: batteries operating at high ambient temperatures age faster and are more stressed.
  • Human error during installation or maintenance: bypassing safety devices or incorrect commissioning.



Safety systems & design features that reduce risk

  • Robust BMS (Battery Management System): cell balancing, over/under voltage protection, temperature monitoring and communication alarms.
  • FireBlock & enclosure design: physical protections, compartmentalisation and fire-resistant materials where required.
  • Correct fusing and DC protection: inline fuses, breakers and rapid isolation for fault conditions.
  • CT/monitoring and telemetry: continuous monitoring allows early detection of abnormal behaviour and remote shutdown if necessary.
  • Certified components & installers: use of certified inverters, approved protection devices and accredited installers reduces risk significantly.



Best practices to minimise fire risk

  • Always use an LBSA-authorised installer or certified electrician familiar with battery systems.
  • Follow LBSA commissioning procedures and ensure firmware/firmware updates are applied to BMS/inverter firmware as recommended.
  • Install correct DC/AC protection, size cables appropriately, and torque terminals to manufacturer specs.
  • Provide adequate ventilation and temperature control for battery rooms; avoid direct sun and hot zones.
  • Segregate battery critical circuits and provide clear labelling and access for emergency isolation.
  • Schedule periodic inspection and thermal imaging checks on connections, and review BMS logs for anomalies.



Conclusion

In short: while some lithium chemistries are more combustible, LiFePO4 (used by LBSA) is among the safest options for solar storage. Most real-world fire incidents arise from installation or system faults rather than the battery chemistry itself. Proper system design, certified components, a strong BMS, good thermal management and qualified installers are the most effective measures to keep your installation safe.



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