So, I've been thinking about my battery bank design....
What I have in mind is to run 6 pairs of 6V 215ah batteries
to get 12V and 1290ah. (Used the 20ah rate to calculate it, did I figure that right?)
An alternative battery I am also considering
To keep the draw from each pair as even as possible, I plan to use equal length 4 or 6AWG cables* from each pair to connect to a bus bar type setup which will have an inverter and charger or inverter/charger connected to it using 1/0 cable or larger with a 250A breaker, as well as a small load center for the direct 12VDC loads (sizing to be determined after I see how much draw there will be).
The batteries will be held in place using a fabricated wooden framework with an insulated and vented cover to keep them warm during the cooler weather coming. Since they are lead acid batteries they will live in the underbay storage.... though I will have to figure a way to access the caps for required maintenance since 800 lbs of batteries aren't gonna move as a unit very easily.
Until I get my solar setup worked out, power to charge the bank will come from a generator. Figure charging the batteries will be less of a draw on the generator and require less running time than running all the AC loads.
Is there anything I should change or rethink?
* I ran a 2500 watt inverter on my big rig and it used two runs of cable each for positive and negative, can't remember whether it was 4 or 6 AWG but whatever it was is what I will use.