I am upgrading my boat to have Lithium for the house bank and Lead acid for the starter. I want to use the Alternator for the charging as well as using solar.
Looking at the Victron diagrams I see that using either a Cyrix-Li-ct or an Argofet battery combiner (lower quiescent power draw) I can do this. The Alternators are externally regulated to protect them for when the BMS shuts off the Lithium charge and there is the Lead acid also in circuit to protect the alternator.
My question is, how do you protect the Lead acid starter battery from damage of over charging?