Battery temperature too high. Battery BMS has disconnected to protect cells.
Common causes
Ambient temperature too highPoor ventilation around batteryBattery in direct sunlight
What to check
STEP 1
Check battery location — must be out of direct sunlight. Ambient temperature must be within spec: Dyness Powerbox G2: 0–40°C charge, −20–55°C discharge. Fogstar Drift 16kWh: 0–45°C
STEP 2
Ensure 100mm clearance around battery for ventilation. Do not mount next to heat sources
Escalate if
Environment within spec but fault persists — internal cell or BMS fault, contact manufacturer
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