Charging 12V Batteries in Parallel
We are set to pick up our new TT monday. For the past 3-4 years the wife and i have been pretty recreational campers, camp sights, lakes, etc. I'd like to get a bit more off the grid, and have bee...
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If you put 12V batteries in parallel, you will be hard pressed to get capacity X2 from them. Lead acid batteries just do not play well together. If the two are not of the same line the same day. They will never both come to full density (charge) at the same time. And, if they are different ages - just forget it....
If you are stuck with it that way, separate the batteries for charging, but the weaker battery will still drag the better down while they are connected.
This is true of all banks of paralleled LA batteries.
IF this is just for a season, do what ever, but if you are going to replace either or both then go get a pair of golfcart batteries and put them in series for 12V.
I made a living do DC electric on expensive boats for many years.
Matt
If you are stuck with it that way, separate the batteries for charging, but the weaker battery will still drag the better down while they are connected.
This is true of all banks of paralleled LA batteries.
IF this is just for a season, do what ever, but if you are going to replace either or both then go get a pair of golfcart batteries and put them in series for 12V.
I made a living do DC electric on expensive boats for many years.
Matt
