I'm a bit late to this party, But I have a Samlex EVO in our motorhome with two 100Ahr LFP batteries. I just switch to LFP last month, so still learning.
We won't be going out again for about a month, but the motorhome fridge (all-electric) is the shop beer fridge and I like to go take a siesta now an again in it. So I leave it plugged in, but didn't want the battery at full charge while sitting. The EVO won't output 12V if there is no battery connected, so a battery cut-out switch won't work for me.
I was able to lower the Absorption voltage to 13.5V (lowest setting) and the float @ 13.5V as well. That's still higher than the 60% or so suggested storage voltage, but its not full charge either. I pulled the fuse from the solar controller.