Everyone talks about the "ideal" situation where house bank is physically located in the same space.
Sure it'd be great to locate all my
batteries in one physical space, but unless I go to lifpo, I can't do that. Maybe in about 5 or so years when this bank dies,
lithium will be a real
price competitor, but until then, it will have to wait.
That being said, I'm having a hard time finding out how people are
wiring a house bank that is located in two separate locations.
I know that cable lengths between the two banks should be "equal" lengths, along with the interconnects being equal lengths. I'm
wiring up 4, potentially 5 firefly
batteries, 2 in each location(or 3 in one, 2 in the other). The distributor i'm working with is giving me a good deal and due to
work i've done with them in exchange for discounts.
That being said, heres a very basic schematic i was thinking of doing for my wiring. The unswitched bar will also have my
MPPT controllers and my inverter/charger as well(connected via fuse &
service disconnect).
Wire sizing:
Bar to ACR to Starter - 2/0
100amp
Alternator to bar - 2/0
Inverter/Charger to Bar - 4/0
Bar to House Switch - 2/0
BOTH House bank to Bar - 4/0
My biggest question is regarding the
alternator and how it will charge the two banks. The alternator is a
Balmar 100amp externally regulated with mc-614. I have two
battery temp sensors, one for each bank as well.
Anyone have thoughts on this?