Originally Posted by John m
I recently acquired a 2016 roadtrek e-trek 800 with 400+ amps of solar. How long is the typical charging time for the solar to recharge the lithiumís?
If they are way down, 800ah to recover. 400 watts of solar will give about 120ah per good sun day. Nearly 7 days to recharge that much, assuming no use in the van and no parasitic loss. The parasitic will be somewhere between 50 and 100ah per day depending on the rev level of battery, so you will use up most of you solar on that and take way more than a week to recharge.
Don't count on the solar to do much for you, the only way you will get charged is by running the engine or driving, in the real world.