Hello, Gigapower.
For your first question: If the working power of the inverter is less than the minimum power of the inverter, the inverter will be shut down. If you do not want to turn off the inverter at night, send a reactive power command to the inverter, but this will consume electricity. You can set it in SUN2000APP. Special user permissions are required. Click "Main Function Menu> Settings> Power Adjustment" to enter the parameter setting interface.
For your second question: The number marked in the picture shows the power you have consumed from 12 midnight to the current.
Thanks!