This is what is balanced and best for twin twelve volt batteries.
As it often doesn't cost a dime more to do this, I think it is worth the trouble.
If you wish to understand the "why" surf here:
correctly interconnecting multiple twelve volt batteriesOthers may say it doesn't matter--but unless there is a compelling reason to not optimize charging and discharging why not do it the best possible way?
Here is a video of 3 twelve volt batteries that have been wired in an unbalanced manner for 2 years. They have been equalized. The test shows how CCA has been adversely affected.
unbalanced for 2 yearswwest wrote:
Batteries in parallel are NEVER a good idea..
They can NEVER be evenly matched, the weaker of the 2 will draw down the other battery, and if one battery develops a partially shorted cell, as is common....
A fully shorted cell could lead to an explosion!
