Batteries in series

[soulie]

I have a question for the battery blokes , a customer has 2 of 12 volt AGM batteries deep cycle with a Victron load balancer . can he charge it with a 12 volt charger , while hes waiting for panels .Batteries are in series .

 

[B-1]

I would disconnect the centre cable and charge each battery by itself and then reconnect.
It will likely be fine with a lower amp charger as is but the battery balancer is going to get confused and work really hard(most only have a few amps capacity)

 

[soulie]

I would disconnect the centre cable and charge each battery by itself and then reconnect.
It will likely be fine with a lower amp charger as is but the battery balancer is going to get confused and work really hard(most only have a few amps capacity)

Thats what i read something like 0.7 amp balancing

 

[Zuner]

I have a question for the battery blokes , a customer has 2 of 12 volt AGM batteries deep cycle with a Victron load balancer . can he charge it with a 12 volt charger , while hes waiting for panels .Batteries are in series .

Simply put, No
If the batteries are in series then they are 24v.

You can charge them 1 at a time as mentioned above but I would disconnect them as the balancer won't like that 1 battery is being charged and the other not.

 

[soulie]

Thanks ,thought so , he purchased a 24 v Bosch charger , he will probably need it again sometime .

 

[rubentmiller]

Hey guys. I have a similar setup with 2x 12v lithium iron batteries connected in series to supply 24v to my garage motor. I have a 12v charger on the one battery while both are still connected in series. It seems like my second battery has blown 2x cells.
Looking at the same system - would you guys recommend 2x 12v chargers connected to the betteris individually or 1x 24v to supply them both.
Ps: each battery has it’s own balancer.