I am having trouble with my Victron Inverter/Charger. My battery bank(4x206Ah SOK) is showing a voltage of 13.1 all along the terminals. I have 4/0 cables going from my lynx distributor to my inverter/charger along with the 400amp fuse. The problem is that when I power my system on (master switch), nothing happens. I read 13.1v on the DC in side at the multiplus terminals and 0v on the AC side. I have CCGX connected to the VE bus of the inverter.