Solis
RS485 Fail

RS485 Link Lost

EPM lost RS485 connection with one or more inverters. RS485AllFail variant means all inverters lost.

Common causes
RS485 cable faultTermination or addressing issue
What to check
STEP 1
Check the communication cables between the EPM and the affected inverters.
Escalate if
Cabling sound but link still drops
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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
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