If PV string is also connected with enough voltage, the display will be as shown
below to indicate the power flow from PV string. Except only solar setting for
charger priority.
Even if AC input is absent, PV power can still charge the battery and the display
will be as shown below.
3.4 Operation Modes (after powered on)
Press the Power ON/OFF button to power on the inverter and the inverter will
automatically enter into either of the operation mode according to the condition of
AC input and PV input as shown in the table below