NOTED: The Source B must power on if you use this PV type. Because the voltage of the inverter is not stable
PV Inerter type have to connect Inverter for SourceA, Inverter and PV system as main power.
Only for for PV system and Inverter to city power, not for City Power and Generator to City Power and Generator.
Dual PowerAutomatic Transfer Switch. PC level, Switch less than 8ms, no Interrupt.