Growatt WIT 50-100K-US - Error

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Warning 501
Battery disconnected
1. Check if the battery is properly connected.
2. If the error message persists, contact Growatt support.
Warning 502
Battery voltage too high
1. Check if the battery voltage is within the permissible
range.
2. Check if the battery is correctly connected.
3. If the error message persists, contact Growatt support.
Warning 503
Battery voltage too low
1. Check if the battery voltage is within the permissible
range.
2. Check if the battery is correctly connected.
3. If the error message persists, contact Growatt support.
Warning 504
Battery terminals are reversely
connected
1. Check if the positive and negative terminals of the
battery are reversely connected.
2. If the error message persists, contact Growatt support.
Warning 505
Temperature sensor of the
lead-acid battery is disconnected
1. Check if the temperature sensor of the lead-acid battery
is installed or not.
2. Check if the temperature sensor is well-connected.
3. If the error message persists, contact Growatt support.
Warning 506
Battery temperature is out of range
1. Check if the ambient temperature of the battery is
within the specified range.
2. If the error message persists, contact Growatt support.
Warning 507
BMS reported a fault; both
charging and discharging failed
1. Figure out the cause according to the BMS error code.
2. If the error message persists, contact Growatt support.
Warning 508
Lithium battery overload
protection
1. Check if the power of the load exceeds the BAT rated
discharge power.
2. If the error message persists, contact Growatt support.
Warning 509
BMS communication abnormal
1. Restart the inverter.
2. If the error message persists, contact Growatt support.
Warning 510
BAT SPD function abnormal
1. Check the BAT SPD after powering off the device.
2. If the error message persists, contact Growatt support.
Warning 601
DC component over high in output
voltage
1. Restart the inverter.
2. If the error message persists, contact Growatt support.
Warning 605
Off-grid bus voltage too low
1. Check if the load power exceeds the upper limit.
2. Restart the inverter. If the error message persists,
contact Growatt support.
Warning 609
Balanced circuit abnormal
1. Restart the inverter.
2. If the error message persists, contact Growatt support.
9.2.2 Error
The error code indicates that the device is damaged or the configurations are abnormal. Only
qualified and trained electrical technicians are allowed to rectify the faults. The error message will
disappear after the fault is rectified. If the problem persists, please contact Growatt.