I have a pair of Ronegy 3kw Inverter Chargers drawing from 4 12 volt banks of Ronegy 200AH AGM's I have also 2 300 Watt 30V Xunlight flexible Panels connected to a Combiner feeding a Victron 100-50 MPPT. The Batteries are split up into two banks of 12v 400AH and each inverter charger draws from a 400AH bank. I am using the 300 Watt panel to provide a trickle charge when the system is not in use as the vast majority of the time the system is connected to shore power or drawing from a generator providing split legs of 220. L1 into Bank 1 and L2 into Bank 2. I wanted to be able to combine the battery banks using a change over switch to share the combined capacity of 800AH. Should I add an additional MPPT to the second bank or can I provide trickle charge from one MPPT to both banks ? The System is basically a Big UPS that keeps the electronics powered in a Trailer until the generator comes on line in the event of power disconnect. The solar is purely for a maintenance charge when the unit is not in use and not connected to shore power and not in operation.
Any suggestions would be welcome