Certainly it's possible and expensive. If I were going that route I'd use a 48V system composed of 48V solar controller (output), 48V charger/inverter, 48V lithium batteries and 48V to 12V DC to DC convertor for the standard house loads, ie eliminate the 12V house battery. One forum member has that arrangement and he uses 3 2000W gens as needed.
I'd look into either a very large alternator and wire upgrade from the alternator to the TT battery bank, or a second 120V AC alternator if possible.
Todays common trucks likely don't have hood room for a much bigger or second alternator.
