I'm probably overthinking this, but I'm trying to find a way I can get as much current as possible from the vehicle to the TC battery bank without risking damaging the trucks charging system.
I think you are for sure, but hey, i do the same thing often.
Reality is, for ME, there's almost no benefit to charging my house batteries at more than 60amp in real life. I literally almost never stay in the same spot more than one night, and when i am moving, i tend to move alot.
I get the theory of wanting everything charged up as fast as possible, but for ME, it just simply isnt needed.
The 120amp DCDC is double the price, almost double the already big size, requires bigger cables, etc... I am not pinching pennies on the build at all, but i look at that are unneeded really.
I'm on the same page with
@peculierboy on this.
The other thing is...
Yes, i have dual alts for 440amps total...
BUT... I cant find ANY documentation on how they actually function. Does one run until the full 220 is coming out and then the other one turns on to help out? Do they run together and split it? Is one a backup?
My original plan was to simply use one for the truck and one for the house. I was quickly told by the service manager, and a lot of folks on the Cummins forum that it wont work like that, but no one could actually tell me why!
Lots of ideas and theories on how they work, but cant find any actual documentation proving it!
So i'd rather just do exactly what i did with minimal shenanigans involved, (that may alter warranty) and enjoy it