The Anderson PowerMod HP Series B posted by bb_94401 looks really interesting as it allows for the use of 4/0 cable if you get the right part. It also looks like the mating cycles is severely degraded if you mate it under load compared to the 500 cycles under no load. It might make sense to put some form of disconnect in the positive side to allow a no load connection.
One thing that was not clear (but I may have missed it) is the question of polarity. It seems to indicate, but not clearly, that the plugs have polarity which would be nice so that they only go together one way, pos to pos and neg to neg. Avoiding sparks and explosions is always good when working with electricity.
I am thinking about adding a battery in the truck bed as a way to expand the size of my battery bank as well as there is no way to add another battery in the battery compartment.
Thanks to bb_99401.
