Does my MPPT SCC and 120V charger choice make sense for my LiFeMnPO4 batteries?

[Mike90250]

Morningstar TriStar 60 MPPT has some adjustability

Using 2 of them and they are completely adjustable. Voltages, times, Hi, Lo... everything is adjustable They are also very solid, and the 60A version has a web server for remote monitoring with any browser (Windows, Mac, android)

[ASprinter]

Thank you for the replies. The screenshot above is just one I stole from online. As far as I can tell the only adjustments you can make with the Victron 75/15 include the settings you can see in the screenshot. There is no mention of absorb or float time, just a voltage. Do I perhaps need a more advanced solar charge controller? I know the Morningstar TriStar 60 MPPT has some adjustability, but it's huge and four times the price. I'll buy it if that's what I need though.

[Sunking]

No need for the BMS. All you need is a charger be it Solar or AC powered that has one adjustable Float Charge setting of 13.5 to 13.8 volts. Do not make it more complicated than it is.

[Mike90250]

Better set EQ to = float voltage, and auto EQ to OFF, or in 10 days, you fry the cells.
You want to set ABSORB time to 1 minute. no more than 5 min. Float time, who cares float is forever.

[ASprinter]

Hi all,
I am designing a solar electric system for my small Sprinter van for camping and could use some help. I am interested in installing a 12V 200-amp/hr LiFeMnPO4 GBS battery that includes cell-level balance boards and a BMS based on the Elite Power Systems kit. Charging will mostly come from a single 305W LG solar panel (40V open circuit voltage, ~10 amps max). I have limited space inside so I am attempting to keep the size of the other components on the smaller side. I would like to use the Victron 75/15 MPPT solar charge controller, which has user-adjustable absorption and float, so I was thinking I could set the absorption to 13.9V and float to 13.2V (or something like that--I don't think the float time is adjustable to less than one hour, so maybe it should be less) to keep the battery from hitting 100% all the time and preserve battery life. The BMS applies a 0.5A load when cell voltage hits 3.55V to cell balance, so these settings would not allow a 100% charge and cell balancing to occur. Question 1, does this logic make sense and can I acheive what I want with the Victron 75/15?

Screenshot of slightly adjustable charge settings on Victron 75/15 solar charger controller:


Question 2 - I do want the ability to use 120V shore power on occasion, mainly to charge up the battery in my driveway prior to a trip, which also means turning on the refrigerator and letting it come down to temperature. I have been unable to find a compact, affordable charger that has user-adjustable settings, however Victron has a Blue Smart IP22 30-amp charger with a pre-programmed lithium setting (I know, I know...) that deletes the 6-stage AGM charge profile for a 2-stage 14.2V bulk and 13.35V float setting. Because shorepower will be infrequently used, I thought this might work okay and would probably allow my batteries to do the cell balance. Is there a better product or way to do this?