Originally Posted by
proptwister
I run a full Lithium Pro setup: cranking, 2 36 volt TM, and house battery. I have the small start battery and the 12 volt house battery on a Perko jump switch so I could tie the house battery to the start battery if I should ever need to (haven't had the need yet). Occasionally I will switch the Perko switch to 'both" and top the house battery off a bit while moving around on the lake. On the rare times I do plug in while at the dock, I have 2 AC (2 leads each) units with 3 leads going to the start battery and one lead going to the house battery.
As others have pointed out, the 3 leads to the start battery provide the necessary current, once the start battery reaches full charge, for the DC side to kick in and charge the TM batteries. Remember these lithium batteries can charge at 45 amps, hence the 3 AC leads. The 4th lead goes to the house battery.
As I see it for yours, you could probably do with a single AC charger from Danny to handle charge duty to the start and house battery. Should only need it occasionally to top both (house/TM) off after a long day on the water. Your graphs will run for a LONG time on a 100 AH lithium house battery. Danny can be a bit tough to catch on the phone but he could probably point you in the right direction.