Hi! I am working on a "simple" diagram for a sailboat.
All charging sources (including 4pcs MPPT 75/15) go to Charge Bus Bar that feeds LiFePo4 house battery.
From the same Charge Bus Bar I am going to feed the ORION DC-DC Charger to charge the AGM starter battery. The AGM start battery will supply also the bilge pump.
When I leave the boat for longer period, I would like to disconnect the LiFePo4 house battery to store it at 50-70% SOC as recommended (all charge sources and loads disconnected).
The AGM battery remains connected to keep the Bilge Pump working.
Now the question:
Will the AGM battery get solar charge, when MPPT supplies voltage to the Charge Bus Bar and from there to ORION Charger, but no other battery is connected to the Charge Bus Bar (in other words: no battery connected to MPPT).