My vessel uses a bank of LiFePO4 batteries
for the house, and separate AGM batteries
for each engine battery
( 2 SGM for our two engine
catamaran). The alternators for each engine are each connected to a battery
isolators (Cristec RCE/100-1E-2IG - one input, two outputs). One output goes to the LIFePO4
battery bank, the other to the respective (port, starboard) engine battery. I assume the isolators pushes current
to the output port having the lowest voltage potential with respect to the ground.
I have not yet used the engines to charge up the LiFePO4 house bank. I have plenty of solar
As the average voltage of the LiFePO4 is around 12.5v, I suspect the isolators never route current
to the LiFePO4. When the solar panels
are working the voltage at the batteries is around 14.6V.
First, am I damaging any of my batteries with the alternator charging
two different types of batteries? Damaging either the LiFePO4 or AGMs?
Second, should I simply disconnect the LiFePO4 from the isolators and let the alternator
simply charge the engine batteries?