If you decide to move forward with this, I wish you the best of luck, and I will even be happy to answer questions and lend a hand.
...Of course the DC would only charge the batteries while I was towing the VW so it should cost no more diesel then towing any other toad....
...Where I live, our power plants provide electricity through windmills so I dont use fossil fuel or nuclear waste to get the electricity to recharge anything....
The power to charge the batteries in the toad is not free, it has to come from somewhere. Your main engine will burn more fuel running your 96-volt alternator to charge the toad than it would to just tow. You haven't said how many watts are needed to charge, but figure that every 6kW costs you ten engine HP, give or take.
Well I cant cure the world's problems. The best I can do is try to make as little impact as possible as I pass thru this world and pass it on to the next generation.
I dont know how many watts I need. If the 96 volt alternator is not efficient enough then how about plugging the toad into a charger/pure sine wave inverter on the rv?