I have a Multiplus-II hooked up to LiFePO4 in a portable box. I'm considering replacing my DROK voltage readout with a BMV 7-series (likely the BMV 700) so I can actually track amp-hours in and out. This box isn't used often, it's for local power outages, camping, events, etc. So I hooked up one of those big red marine/RV round switches to connect/disconnect the battery from the Multiplus. The switch goes has OFF, Precharge, ON positions, giving me a pre-charge circuit to avoid the "big spark from capacitor charge up" problem.
Since I leave this box sitting for months at a time, I'd like to be able to completely turn it off, with a BMV-700 (and the others in the family) what info/settings do I lose if the BMV unit loses power? It would be great if amp-hours isn't lost, but I suspect it will be. If overall settings are lost, that's kind of a deal breaker.