I have a BMV-702 installed in my truck camper with two lithium 100 Ah batteries. The primary bank monitor is connected to lithium house batteries. I went ahead (because I could) and connected the feed coming from the truck as the second bank for monitoring. The batteries in the truck are isolated from the house batteries using a Blue Sea Systems isolator.
What is weird is that I've seen the BMV percentage of charge *increase* over night while boon docking. Once again this morning (after an overcast day yesterday with rain), the BMV was showing a fully charged system even though I saw it down around 90% yesterday.
The video is representative of what I've experienced The monitor may indicate ~90% charge when I go to bed, but be back up at 100% in the morning.
What could be causing this?