I have tried chargery on a 48 volt system and it was not accurate.. I would say stay away from chargery for 48 volt till they get their act together.. do some searches on this forum.
Noenegdod.
Very nice, do you have any separate independent breakers Incase the victron fails in an undesirable...
https://www.ebay.com/itm/254647610560
Yeah, well removing the shunt is better but since you were talking about recalibrating the bms I figured you had not thought about changing the shunt.
And it your response you mentioned that you needed to use a large current bms in case you could not...
Timely subject, I am interested in a similar approach.
Why would you not be able to work with an external shunt in parallel with the internal one?
Wonder how fast the reset time is of the current limiting circuit.
Does the bms recover from an overload current after a couple of seconds or do you...
Without to much problem I was able to ohm out that each transformer has two out of three coils directly connected to the two MOSFETs and to one of the pins on the white connector.. so that would support the theory that each of them is powered by one cell. The opto would take care of the voltage...
I was curious about this 4 cell active balancer board. It has 4 transformers so it seems to be a stack balancer transforming the cell voltage back to the overall assembly voltage.
Tested a slightly unbalanced 280 ah 4 cell pack and it seems to work, some voltage came down and others went up.
So...
In my converted city bus we have a 24 Volt system.. there are 4 identical groups of solar panels each with there own tracer / epever / 1210rn. 10 Amp mppt control with a mt5 remote readout.
I like the redundancy of several charge controllers and indeed we had one unit damaged several years...
So I kind of forgot to follow up.. yes the parts did the trick and the charge controller is working again.
I did some experimenting to use these as lifephosphate. See my new thread.
Tracer 1210 voltage modification for lithium.
Johan
The bms used is the original bms from the Nissan leaf.. the charger is set for constant current of 5 amp and a shutoff voltage at 4.0 volt / cell.
The cells are normally matched very very well. The bms was more used with the leaf spy software to see individual voltage differences and also...
It is all good, I just wanted to document no need to make it smart.. will take the post down to avoid the smug , smartness and hostility. Images removed. Text removed..
Was lucky.....original images and post edited to delete content as to avoid a useless unrelated discussion.
Bms was working, charger failed to shut off, pack was partially used so some cells were not charged.