Everything is working, but Device State is always Fault, why?

[boennhoff]

The sensor Device State has always the Fault state, and I don't know why.

Facts:

• I have a Deye SUN600G3-EU (2x MPPT)
• Two solar modules connected, which almost always provide a similar voltage
  • I found this discussion, but it refers to different voltages...
• At best times I get almost 700W output
• AC Output connected to wall socket, small and simple setup
• The inverter is connected through Wifi and its Internet Connection is blocked
• The sensor Device Fault states OK...
• I recently switched from the original Solarman integration to this one, but the problem persisted

[pizzarabe]

Same problem here with a Deye SUN800G3-EU. I also blocked its internet connection so maybe this is the "fault" the inverter is reporting.