mixing batteriy sizes
I have 3 deep cell batteries. One of them is bigger (and newer) than the other 2. What happens if I try to use a big and small one together? What about putting all 3 together?
Forum Discussion
JaxDad wrote:
Another option for you to consider is to create two ‘banks’ of battery power by running the newer battery by itself and the other 2 (together) as a second battery.
This can be done via a cheap marine battery switch (bat. 1, bat. 2, both, off) or by just swapping cables.
With one, or two, battery switches you can combine or isolate batteries any way you wish.
Did that with a boat. I had a total of five group 31 gel cell batteries arranged in three banks that were switchable. Two banks of two batteries in parallel and a single, all switchable for a single or combo that I pleased.
