D-tub Power and Electronics

Under the hood will be eight large (69 lb) 12-volt AGM deep-cycle batteries used to create 24V battery bank.  I want to be able to operate silently for a long time, hence the large battery bank.  I'm running at 24 volts just because a couple of critical parts I got surplus were 24 volts, so I've just stuck with it.  There's less competition for 24v parts.

I'm using a Heart Freedom 25,  a 2500 watt marine inverter with integrated 65A battery charger.

Power is generated with two honda 2k generators drawing gasoline out of a 25 gallon tank, both mounted near the rear bumper of the vehicle.
I'd like to get a Honda 3k generator, but that'll probably have to wait until at least next year.  Remote start would be a huge convenience, and I'm going to have to run the 2k pretty hard to keep up with the power usage.

I worked on a project where we developed a custom circuit board for motor and relay control for a system very much like a hot tub, and I programmed the interface board for this system.  It uses an isolated power supply for control panel, so it can be safely placed next to the water's edge.  I'll need to reprogram the interface menu system for this project, but it should be rather straightforward (I had the mobile hot tub project in mind when I was writing the code for it).

From this interface, I should be have the following capabilities: