30

Thermal Runaway

Fronius · Perfect Charging

What does 30 mean?

The battery is experiencing an uncontrolled self-heating process, characteristic of thermal runaway. This is an extremely dangerous condition that can escalate rapidly, leading to smoke, fire, or explosion if not immediately contained.

Common Causes

  • An internal short circuit within the battery cells, leading to localized heating and increased current flow.
  • Overcharging at excessive currents or voltages, generating uncontrolled heat.
  • Physical damage to the battery, compromising cell integrity and leading to internal reactions.
  • External heating combined with internal heat generation, pushing the battery beyond its thermal limits.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    IMMEDIATELY isolate the battery and charger from all connections if it can be done safely without risk to personnel.

  2. 2

    Follow all established safety protocols for handling thermal runaway incidents, which may include evacuation of the area and activation of appropriate fire suppression systems.

  3. 3

    Do not attempt to re-use the battery or charger without a thorough inspection and certification by a qualified professional to ensure safety.

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Verified technical data. Last updated: March 2026

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