Originally Posted by d4raffy
So, i am assuming that multiple Sterling chargers don't get confused and all stay at the correct charging stage regardless. With no interconnect cable, wonder how they do this.
Its not just two Sterlings, it two chargers of almost any make as well as a charger and a wind generator
and a Solar
charger,they will all work together if correctly programmed. The key I think is being able to program one.
I have one Sterling and the Magnum, often depending on how it is programmed one will go into float before the other, so what happens if they were both supplying say 25 amps to the bank at absorption voltage, and one goes into float, the other will now supply 50 amps into the bank, cause 50 amps is below the max of 60 that the Sterling can supply, and 50 is the max that the bank can accept, due to its acceptance rate. Even if I had a 500 amp charger, 50 is all the bank will accept at this point.
Together they can supply 185 amps, and when the bank is low they will supply 185 amps, but after about 30 min., the acceptance rate of the bank begins to decline and you see the charge rate begin to drop, after maybe the first hour it's below 60 amps.
These are numbers for a 12V bank, be half that for a 24V of course, and these numbers are guesses, I have not done a study where I record
the numbers, but I know as the first 30 min of generator
run time, I need to keep the other big loads off so my batteries can get all they will take, after 30 min, I can start heating water
or running an AC or whatever.
Having a BIG charger does not cut charging time by as much as you may think. The reason is the bank can only accept so much, and the more charged it is, of course the lower the acceptance rate is.
If I had to guess I'd guess that having a BIG charger will only reduce your charge time by about a half an hour, but having two chargers is worth while in my opinion as you know have a back up
However with some types of battery chemistry, I believe that high charge rates can be beneficial, flooded batteries for instance, high charge rates can contribute to the electrolyte being stirred, convection currents will ensure it's properly mixed, I think that AGM
batteries also benefit from high charge rates, but I'm not sure why.
Gels I don't know much about