Growatt
Warning 501
Battery SOC Low Warning
Battery state of charge has fallen below the low SoC warning threshold. Not yet at minimum reserve but approaching it.
Common causes
Extended grid outage or prolonged overcast weatherBattery capacity degrading over timeDischarge limit set too aggressively
What to check
STEP 1
Check ShinePhone for grid availability. If grid is present and battery is not charging, check charge mode and BMS comms (Warning 500)
STEP 2
If this appears regularly during normal operation, check that battery capacity is matched to site load profile
Escalate if
Battery consistently runs to low SoC under normal conditions -- may indicate degraded capacity, escalate for capacity test
Need full interactive diagnosis?
Faultpath walks you through decision trees, fault codes, and commissioning — built for solar & battery engineers.
Open Faultpath
More Growatt fault codes