So I've done 3 brews now on my 35L Gen 4 240v system and it's been a mix of results so far. The first batch was default settings with PID and the BT Thermometer turned on, during the mash it seemed to get stuck but this was a kit heffeweizen and my suspicion is that it was milled a bit too fine and there were no rice hulls and I possibly put the top plate on too quick.
During the second batch my OG was way off because I boiled of much less water than the Brewfather indicates and I didn't lose anywhere near as much due to the chiller/trub. I think I only boiled off about 2.5L instead of the 4.5L for a 60 minute boil. I ended up with about 13L in the fermenter on what was supposed to be a 10L batch.
So before brewing the next batch I did a test to see how much water I would boil off in an hour time and using the L increments in the BZ itself. I put in 15L of water according to my measuring bucket(and weight), which the BZ indicated it was 15.5L, I then brought the water up to a boil and set a timer for 60 minutes, at which point I turned the heating element off and put the chiller in to cool it back down to get my final measurements. In the BZ I had about 13L of water left, after transferring back to my measuring bucket I had about 12.5L left (also verified weight.) So it looks like my L increments are off by .5L.
I updated my brewfather profile before the next batch but again I had more water left than I was counting on. Updating the measurements on my batch during the brew it seems to indicate I only boiled off 2.1L so I still ended up with 15.3L on a 15L batch. Also my OG was 1.042 instead of 1.046, It was a recipe for a blond using about 400G of candy syrup and I'm wondering if maybe that wasn't all absorbed and maybe burned onto the bottom a bit, I only noticed some white marks baked onto the bottom but not really anything burnt.