Flashing red indicator
A red flashing indicator on the battery unit signals a fault state on the stored-energy side.
Common causes
- Inverter-side fault reported through the battery indicator
- Arc, ground or rapid-shutdown event
- Internal protection trip
- Communication loss during operation
Safe checks
- 1Note the exact flash pattern and timing.
- 2Check the owner app for a fault description.
- 3Do not open the unit or remove covers — the unit stores energy after shutdown.
- 4Contact a certified installer with the pattern you observed.
Related error codes
Brands commonly affected
When to call a technician
Call a qualified technician if the device repeats the fault after a manufacturer-approved restart, shows a burning smell, has damaged or discoloured wiring, or if the symptom involves the battery, inverter power stage or any sealed high-voltage component.