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Solis
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OV-BUS
Solis
OV-BUS
DC Bus Overvoltage (Alarm 1021)
Internal DC bus voltage above limit.
Common causes
PV input voltage too high
Internal fault
What to check
STEP 1
Check the PV input voltage is within the inverter range, then restart.
Escalate if
Persists after restart
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More Solis fault codes
E001
Grid Over-Voltage
E002
Grid Under-Voltage
E003
Grid Over-Frequency
E004
Grid Under-Frequency
E005
Grid Impedance High