Fronius · Perfect Charging
The external temperature sensor indicates that the battery temperature is excessively high. This is a critical safety condition that requires immediate attention to prevent thermal runaway, battery degradation, or potential hazards such as fire.
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Verify the ambient temperature surrounding the battery and ensure adequate ventilation.
Reduce the charging current, if adjustable, or temporarily pause the charging process to allow the battery to cool down.
Ensure the external temperature sensor is properly attached to the battery surface at the recommended location for accurate temperature measurement.