No float... just stayed in mppt mode, and I'm assuming bulk mode. Amps appeared to be tapering a few times, but then they would rise back up, rather significantly, when there was a break in the clouds. I checked which mode it was in several times, under both conditions.
There is a setting for 'full'... SOC, which has a fixed value of 100%. I thought there was another option, as well, but on further review, it appears not.
As stated in the OP, the unit simply shut down once it's display reached 100% soc, which was well below full. While I was trying to figure things out, the panels crashed. It looks like it'll be a few days before the weather cooperates again, but I'll do an earlier, less deep run and see how things go.
