4@12v = 24v
I'm installing 4 -12v AGM batteries to power a 24v inverter. This is my first choice for wiring: and my second: Any pros or cons to either one?
Forum Discussion
Salvo wrote:
Sounds like another parallel vs. series discussion to me. ;-)
As they say, you're only as strong as the weakest link in a series string. Or, one rotten apple can spoil the series string.
Which scenario is better: 6 batteries in parallel or in series when one of the batteries has 3 times the internal resistance as the others.
Sal
There are advantages and disadvantages to both. A battery that has a shorted cell (fairly common failure mechanism in older batteries) will become a sink and can drag down an entire bank of parallel-wired batteries. A shorted cell in a series string will simply reduce bank voltage by ~2 volts.
Personally I would choose series over parallel. Assuming you start will all new batteries of the same capacity, and you maintain them properly, there is probably less of a chance of an imbalance developing in the first place.
