The voltage between the 2 will always be the same so one will not fill faster than the other.since one is 100Ah, the charger will keep on charging till it fills up that 50 extra Ah. wont it be bad for the smaller Ah battery?
For the sake of discussion and learning what do you think is going to happen?If I were to do that I would every so often during discharging and while charging measure in/out current to the combined battery as well as between batteries (using a clamp meter). Just to make sure that nothing surprising goes on. I might even go so far as to place an inline fuse or switch between the batteries to be able to measure their voltage separately.
Hopefully, there's nothing interesting to observe. Obviously, what I'd like to see are proportionally similar charge and discharge currents otherwise the batteries' state of charge would drift apart. In the worst case I can imagine one battery's SOC going so low that the BMS will disconnect it but the other battery will still be online and the user wouldn't know about it. All of that could happen with two batteries of same capacity but I imagine that it is more likely to happen with batteries of dissimilar capacities.For the sake of discussion and learning what do you think is going to happen?
Geezer has not specified what his batteries are.Are they the same brand, using the same internal cylindrical cells (just fewer of them, in the case of the 50Ah unit)?
Oh, if they are lead-acid then they'll self-destruct fast anyway and any potential misconfiguration will be irrelevant . I thought this was a LIFEPO4 forum?Geezer has not specified what his batteries are.
Probably lead but who knows?
lithium ironGeezer has not specified what his batteries are.
Probably lead but who knows?
lithium ironOh, if they are lead-acid then they'll self-destruct fast anyway and any potential misconfiguration will be irrelevant . I thought this was a LIFEPO4 forum?
Ok so what brand are your lithium iron batteries or are they diy?lithium iron