I purchase 3 Balancers and am using it on a 48V string of 4 x 12 V 170AH batteries. What I find after the balancers have
have stabilsed is that there is almost exactly 100mV difference between each pair of 12 V batteries - so the the voltages are as follows from the negative side 13.65 , 13.55, 13.45 , 13.35 V . The charge current is less than 100mA and all LED are green. The bank is stable and voltages will remain like that for days. The balancers do not appear to control the voltages to all be equal but rather to achieve a 50mv midpoint error (50mv midpoint error equates to a 100mV difference between two adjacent batteries ) Is this correct behaviour? Must I wait more than 3 days for batteries to all equal?

As shown in the pic1. This is what the Battery Balancer datasheets shows. And pic2 shows what the Battery Balancer app is telling us. https://uploads.disquscdn.c...https://uploads.disquscdn.c...
What is the best solution? Is there any differens?

these are petty equal, having the plus/minus of the balancer on the battery/busbar would be problem. On the busbar is theoretically better

Thanks for your reply!
It was mine supposition that pic.2, is the best solution.

Ciao a tutti! Hello!
Consider the configuration with 3 battery balancers for 48v systems of 12v batteries and different many strings (for example 4 series x 4 parallels lead acid).
The balancing benefits are clear. But I would like to ask quests:
1. in a system with many batteries, what happens if one of them fails? Example: short circuit of a cell of a battery?
2. can you think about protecting the single battery only with fuses? or are not they enough?
I am trying to understand if it is possible to create an accumulation of energy for a photovoltaic system through the use of cheap lead acid batteries. To do this I have to put the batteries in a condition that they are not stressed and work with small currents and shallow discharges. This objective can only be achieved through parallel configurations of many batteries (example: 4 series x 5 parallels). But I'm not clear what could happen in case of failures on individual elements.
3. Is it possible to use the alarm output of the balancer to manage safety in case of problems?

Grazie!

Hi, I have 3 AGM batteries 12v/110AH connected in parallel for a total of 12v/330AH. I'd like to know how many battery balancer I need and how have to be connected.

Thanks for yuor prompt reply.
Gianfranco

Hi, i have 5 Vctron 12 V Battery Gel 220AH connect on series (48 V System ) so i have 60 V and i like to have battery balancer how many battery balancer i need ? and how can i connect dem together .Can you help me to have some diagram for that .Thanks

My thinking would be, 5 battery would need 4 balancers. 4 battery has 3 balancers. 2 battery has 1 balancer.

We have a client with 6 x 2 volt 700 Ah OPZ Gel batteries and we want to add another 6 batteries.
Can we move to 24V or best to stay with 12V system for balancing?

No, for 2V batteries the balacer isnt really helpfull.

PS beware not to mix "old" batteries with new ones as they might have changed already due to usage.
It will create a huge unbalance then.

well 6x 2V cells is 12V and that works obviously ;-)

Yes, but the midpoint is not on 12vdc is it ?
The balancer works on a midpoint on 12vdc in a 24vdc system (or on the 12/24/36vdc midpoints in a 48v system when using three balances )
On a 12v system the balancer cannot work

OK had 24v om my mind 😎

I am migrating from 12V to 24V. I wish to feed my old 12V loads from a 12V battery (A) that is then connected in series with a second 12V battery (B) to serve my new 24v loads. If A is discharged faster than B, will this product solve the problem? If I used your Li Ion (LFP) batteries, could I acheive good results without this product by relying on the internal balancing you mention below?

The basic rule is to never discharge one battery from a serial connected bank, This will reduced the lifetime dramatically of the battery.
For 12Vdc from a 24Vdc bank please use a Orion DcDc converter

yes, but then two are needed as you said.

Hello,
I have 6 lifepo4 100Ah batteries with internal BMS to make 24V (3 batteries parallel connectet to 3 batteries parallel )
Should I use a battery balancer to keep the midpoint Ok ?

Hello,
The balancer is designed for lead/acid batteries and not the Lithium batteries.
They have internal balancing already built in.

Does Victron make a battery balancer that works with lithium ion batteries that are not Victron brand?

No, we dont. Sorry for that

Hello,
We have an oldtimer with 24V made of 2 x 12V batteries connected in series. We are currently using a solar panel connected via an MPPT 75/15 to the first battery (12V). If we would add the balancer to the system would that work to ensure the two batteries are equally charged? Or do we need to charge the system on 24V and add the balancer?

No, thats not the way.
Please avoid charging the two batteries independant, but use a 24Vdc charger instead. Or have the two connected in 12V in parallel when the car isnt used so they get the same charger power.

Hello, I am currently building a system with Victron products centered on a 200Ah LiFePO4. I'd like to leave myself room to expand the system at a later time to incorporate a 90 or 160Ah battery if I consume more power than anticipated.

If I later decide to wire 2 batteries in parallel to get more charge and use this Battery Balancer, will I basically be able to treat them like a single, 300Ah battery and connect them through this balancer? What caveats should I be aware of?

Thanks for doing what you do!

I have been using LYP chemistry batteries since 2009. A long time before balncing systems were developed. I run a 24V, 8 x cell arrangement, and have over 500Ah installed. I have series arrangement of battery cells with paralleling interconnects between same voltage cells. I have custom shunt type cell balancing across 12V NOM blocks .
https://uploads.disquscdn.c...https://uploads.disquscdn.c...

My battery is now quite old and the pics show that even so, cells balancing is very acceptable. generally better than 10mV, over a full discharge / charge cycle. Without balancing, the individual cells voltages would seperate to hundreds of mV during a charge cycle.

hello,
You want to add 90Ah units to the 200Ah units you have now?
Thats not a good idea at all.
the balancer is definitely not suitable for that.
Only use equal batteries in a system, and dont use balancers on lithium batteries as these are already built in.

Hello, good day.
Can I conect the Victron Battery Balancer to the Litio-ION battery ?
Kind regards.

The Lithium batteries already have internal balancing so then its not needed. So this should not be done.

Thanks for the response.
If I already have the Litio-ION batteries, Can I connect the Victron Battery Balance?

No, its not designed for this usage.

Hi! What is the maximum capacity battery (Ah) can I conected to a battery balancer? Kind regards.

Its more a matter of strings then capacity.
When installed at new batteries about 5-10 strings is possible.
But the more strings you have the slower the balancing will go.
So when the battery is very intensively used you might want to have a balancer per 5 strings, otherwise 10 is ok.

Thanks, so Can I connected 8 strings of 4x216Ah? Can you give me a conection diagram please? The deep of cycle of the battery will be 20%.

Hello,
Yes.
For diagram, please contact the dealer, they will help on that further.

Hi there, We are currently using meanwell 1000W 24V charger to charge 24v system which is 2 × 12V 120AH batteries in series , but we having issue with short battery life because of unbalanced load. So, i would like to know if we can use this victron battery balancer to balance these two series batteries? Your help will be highly appreciated.

Yes, thats a good solution.

Good day, I'm using an Easysolar 24/3000 unit with 16 x 100Ah (12V) batteries. 2 x 8 banks (Parallel) connected in series to make 24V. Would a 24V balancer work with this array and could you give me some guidance on wire length and balancer connector placement etc so as to avoid over using certain batteries in the array. Kind regards

Ciao, hello!
How do you protect your battery bank? if in your configuration a battery should break, how would the others be affected? have you adopted any more security tools?
thank you!

Yes the balancer will work here perfectly.
Make sure the interlinks per string are equal in size as the interlink itself. The wire from/too the balancer can remain smaller as there is no high current there (2,5/4mm2 is enough)

Thanks for the response, so all parallel and series connections should be the same gauge wire? Also, where would you recommend to connect the positive and negative Easysolar terminals in this 24V array in order to avoid discharging/ charging some batteries more than others? In other words, to keep all batteries in balance across the array.

hi,
yes , all the same size (except for the balancer wiring itself)

easywiring, as balance as possible, preferably with power post or such and equal length cables to each string

Hello, I am just wondering if the BMV-702 pictured in the Battery Balancer product brochure is also required along with the battery balancer to balance 3 parallel string of 24V (2S/3P) or if it is just an 'optional extra'.? Many thanks

Sorry for the delay.

The battery balancer doesnt need a BMV to work but the BMV enables you to the the actual level of unbalance.

Hello! someone connected 12 batteries (parallel series to get 24Vcc) to two battery balancers? I thought about this connection .... https://uploads.disquscdn.c...

You can do so, but with one it works to althoug balancing goes a bit slower,which normally isnt an issue

Hi ! I are Pasqualino Arnone owner of Electronic Service Italy Please could you tell me how to connect 12 elements of batteries connected on series-parallel (24Vcc) to two battery balancers.

See above, sorry for the delay in answering. Seem to missed your question.

I have a 24 volt system with four 6 volt batteries

The battery balance work?

Hello,
The battery balancer is designed for 12Vdc batteries in a 24Vdc (or 48Vdc) system.
So woth 6Vdc batteries is can balance the 12Vdc midpoint, but not the 6Vdc/18Vdc midpoints as in your system.

Peace be upon those who follow guidance

I want to buy a battery balancer from your esteemed company

I have a 24 volt system with four 6 volt batteries

The battery balancer will be useless

Is it true and why?

If it is true how prolonged life batteries are of alternative solutions

There is a disturbance in the level of battery charges as well

Two ten-volt (.2v) difference between the batteries

I am very grateful if I respond quickly

Two weeks and I did not get any answer to what the problem was