Powering camper while driving with 2400w inverter

[bywaysnothighways]

I'm trying to figure out the best way to charge my camper while driving. On my current truck the 7 pin connector gives next to 0 power to the camper while driving. Would be nice if I could figure out how to charge it while driving so my lithium batteries are always fully charged when arriving to camp for the night. I know the 2400w inverter can do it but figuring the best way to wire it seems tricky. I dont really want a giant extension cord coming out the back hatch of the cruiser and plugged into the port on the side of the camper. Any ideas? Has anyone done this?