The system consists of two inverters ( Quattro and Fronius), batteries and PV panel. previously, the system was connected to a 50 Hz grid. Now I would like to connect it to a 60 Hz grid. Should I connect the inverters to the 60 Hz grid first and then change the frequency settings using VRE Config.? .I need the sequence to change the frequency of the inverter( 50Hz to 60Hz).