Just a tad....
I do like the CC though. I have no experience with others but for the price it has good customization and you can watch it ramp down current and go into float along with things like being able to set boost charge time period etc.
It can be confusing because you can set "boost" at 14.8 volts and the time for 2 hours. It only counts the time at 14.8 volts towards the 2 hours so it can stay in boost mode much longer if the voltage threshold is not reached which makes you think changing the settings isn't making any difference. Or maybe I am the only one that didn't know this.
Same with equalization mode.
I had FLA's when I set up my solar - after building a lifepo4 pack I ordered the 'special cable' - I didn't need the MT50 as my controller is mounted on the wall easy to see. But you can only make settings for lifepo with either the MT50 or the cable and a PC.
I've messed with it for quite some time now, enough to have a good handle on what it does and how it works. The biggest change for my system is the way it reads battery voltage - it measures with charging current on top of the battery, so while it may show 14.0V battery, the actual pack voltage may only be 13.7, still charging, accepting current. I had to adjust all my settings based on this voltage reading bump.
Same for float - I have a 'in storage' parameter file with lower values to allow the pack to drift down to about 70% SOC before recharging it. My 'away' parameters are much more aggressive, to be used when we're actually using the system on a trip, and want full solar charging and to keep the pack topped up, service loads, etc.
The boost duration period starts when the battery reaches your boost voltage level. I run a pretty short duration, a lifepo is fully charged as soon as it reaches anything over about 13.8V for 12V system. Mine is in the RV.
If you change the duration of boost while it's in boost mode, it doesn't take affect 'till the next boost session. Charge voltages seem to take affect immediately.
Equalization not used for lifepo4 - set to zero. In fact, I don't think they use any kind of duration for AGM either.
Also worth noting is when you open a control parameter window, if your battery is lifepo you want to choose that window. It turns on or unlocks things specific to lifepo. I had a standard parameters set to 'user' settings and when I changed it for a lifepo parameter it seems to work much better.
The only problem I have left is my smaller 1206AN switches to float early. Supposedly this is a known problem for the older Tracer AN's - I need to dig into that some more. Fortunately, I don't really rely on that one as much, it's an auxiliary controller for my fold-out portable panels - they're just 160W. They work great for my Delta Mini charging.