Balancing series connected lead acid batteries

[Fuenkli]

this issue has probably been discussed before but I could not find an answer.

to achieve equal voltage on all batteries in a series string is it possible to interconnecting them in parallel? What are the pros and cons?

 

[Chris Hobson]

You are asking the nodes on your battery string to be both at the same voltage and  have a difference of 12,24, or 36 V at the same time - an impossibility basically you are going to short-circuit your string. I will PM you  an  e-mail address to order @Chris-R's HA02 battery balancers . From your photos elsewhere I can see you need two of them.

[___]

Look carefully at your picture. All your batteries have dead shorts across them :-)

[Fuenkli]

thanks guys. You are right. Would cause a nice fire! I will look at the HA02 balancers. From your experience is it necessary to balance the 2 strings in addition to the batteries in the strings?

[Chris Hobson]

Each string is connected  to the same nodes so therefore each string as a whole will be at the same voltage. All that is left for you to do is balance individual batteries within each string. Since each string will be at the same voltage you will have 8 batteries at the same voltage (or within 20mV of each other).

[Fuenkli]

thanks for the quick great help.  Much appreciated.