Bafang · Voltage
07 Bafang error code 07
Over-voltage protection
Per manufacturer documentation
Note
Meaning may depend on model, display and firmware – verify with the manual of the exact type.
Possible causes
General, component-based causes – not a manufacturer-specific statement.
- Low state of charge / heavy sag under load
- Over-voltage (wrong charger, unsuitable battery)
- Faulty voltage sensing in the controller
Safe test steps
- Pack voltage at rest and under load vs. the controller voltage class.
- Charger output voltage per label (S × 4.20 V Li-ion).
Workshop reference values
- Typical controller low-voltage cutoff: approx. 3.0–3.15 V/cell (~30–31.5 V on 36 V) – controller-specific.
Repair approach
- Charge the battery; if it still drops under load: battery diagnosis.
- Replace a battery/charger of the wrong voltage with a matching one.
Tools needed
- Digital multimeter (CAT III, fused inputs)
- Fused load tester
Safety
- Never use a battery or charger of a different voltage with the system.
This information does not replace manufacturer service documentation. Work on batteries and high-voltage parts only with the appropriate expertise.