wish i could say i had better news...
ok, so from looking at the link, and some time on Alibaba and aliexpress. what you have here is where someone purchased a bunch of chineese 12v 100 ah lifepo batteries and then slapped their own "brand" on it.
they probably ordered in a bunch of something like this
https://tinyurl.com/yxdrqzbm
i just mention that one as an example, the specs and case size dont quite match up. there are hundresd of these avaialable and you could spend hours going through the china import websites to try and find the one you have and it might give your more info on what is inside. but even that would be a crap shoot
based on what is available and the specs printed on the one you linked it is anyones guess as to what is actually inside that battery case
pretty confident it IS a lifepo4. other chemistries have different voltages. so that is good
there could be 4 prismatic or even pouch cells in there, or a whole bunch of small or medium sized cylindrical/pouch cells. no way of knowing unless you cut the top off and look inside.
same goes for what ever "BMS Board" they included. it is obviously a very minimal and undersized BMS board. the limit of 50 amp discharge is pretty restrictive. the cells them selves can likely handle a lot more but the bms board is the limiting factor
another aspect i find disappointing in the bms is the really low 8.4 volt discharge shut down. if you run it down that low very much you will kill it or at least seriously reduce the life cycle expectancy
it is disconcerting that they contradict them selves. they claim there is a balancer included but right on the side of the battery it says dont charge with out using a balancer? how do you add your own balancer if you dont have access to the individual cells?
i want to be clear, i dont recommend this battery, i would never install it in a customers rig, i would not even use it in my rig if it was given to me. if it was given to me i would cut it open and test out the components and probably just use the bare cells in a diy project.
but since this is what you have, here are my recommendations to help you get the most out of it
without cutting it open, you have 3 important aspects you can and should protect against
over charging, over discharging and charging below freezing (battery temp, not air temp)
to prevent over charging I would use a charger or charge controller i could set to stop charging at the 14.6 volts and then set a low float of 12.8 or even 12.5. this is at or below the nominal voltage of the cell pack and as such will essentially stop all charging but if loads draw it below that the charger/controller should kick back into bulk phase again.
to prevent over discharge i would find and install a low voltage disconnect (LVD) that is or can be set at 11.6v or even 11.7v that would be slightly higher than the recommended minimum operating voltage of 11.5v
then either be prepared to disconnect all charging sources if the batteries get below freezing or make sure all charge sources can be set to do that for you. my victron solar controllers have that option
anything you can do to keep the battery temp down during the day will improve their life span
if none of the internal connections or electronics fail, you might get some good life out of this.
this is a lot to work on and stay up with, almost as much as if you had done a DIY from scratch.
you could also just put your trust in the "company" and just hook it up to your alternator and report back to us as to how well it works and how long it lasts. you might get lucky, some have. you might not...
