Battery Over Temperature

What does F44 mean?

This Automatic Fault indicates a battery over-temperature shutdown at 60 °C to prevent damage to the battery bank. The XW Pro will recover and enable operation again when the temperature falls to 50 °C.

• Inadequate ventilation or cooling in the battery enclosure, leading to heat buildup (e.g., ambient temperature > 40°C).
• Excessive charging or discharging current exceeding battery manufacturer specifications, generating internal heat.
• Faulty battery temperature sensor providing inaccurate readings (e.g., reporting higher temperature than actual).
• High ambient temperature in the equipment room, especially during peak load or charging cycles.
• Internal battery cell degradation or short circuit, causing localized overheating.

Click steps to track your progress.

1. 1

   Measure the actual battery temperature using an infrared thermometer or thermocouple directly on battery terminals and cell surfaces.

2. 2

   Verify ambient temperature in the battery enclosure and ensure proper airflow, fan operation, and clear ventilation paths are maintained.

3. 3

   Check battery charging/discharging current (e.g., parameter P5-01 for charge current limit) against battery manufacturer specifications.

4. 4

   Inspect the battery temperature sensor (e.g., located on battery terminal or cable) for physical damage, corrosion, or loose connections.

5. 5

   Reduce the charging current limit via inverter parameters (e.g., Parameter P5-01) to decrease heat generation during charging cycles.