If the device is charged via the solar MC4 line and the AC port, the AC output does not work.
This is normal and not a problem.
Because the device has only one inverter, when charging via solar, the DC needs to be turned into AC via the inverter and then into the AC port, so the inverter is occupied and cannot output AC at the same time.
Thank you for your understanding, or you can pass the XT60 DC input, but the maximum power is 600W.