Thanks a bunch Zyzzyx!No. The house electrical is completely separate from the chassis electrical. Not even using the body for ground.
So far the solar has been more than enough to charge things back up. Even when I ran the a/c into the night, I could still start it the next morning on low and by mid-morning I would be getting more charge than the a/c was drawing, and still get back to a high charge on the batteries. Also, being lithium, I don't have to be concerned about getting back to 100% all the time.
Now, if I were to charge the system from the van, I would probably again follow the design idea from Dave Orton. Connect a small (300 watt?) inverter to the van battery, run the output from that to the input of my house inverter/charger, and then be charging the lithium batteries with the correct charge profile instead of just giving them whatever voltage/amperage the van wanted to produce.
Our builds are similar in a lot of ways, I have same van but gas, lithium but 9Kw, 600w solar, 12v roof top AC 1100 BTU, aluminum profile build, OH and three fur Kids
Got the bigger battery to run the AC, induction stove, and in-floor radiant heat. I think I will need to charge from alternator in addition to solar to compensate for bigger loads. My electrician suggested installing a Sterling battery to battery charger to control voltage and protect starter battery.
Thanks again Zyzzyx and keep up the excellent work!