Just curious, we have been considering a Roadtrek for personal use, not mobile grooming, and saw this on an underhood generator that reduce gen noise and lots of benefits. See video. I am no tech but UD and others, look you don't even need an inverter to charge batteries. Sound good?
I thought this was interesting about faster charging batteries. https://www.youtube.com/watch?v=I_1vAMrvqnA