Third From Texas
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Interesting!! So I assume each port goes to one battery with a 12 volt charger? Could a 24 volt charger be used so only one plug is needed or wired I wonder. I see how that will work as it wouldn't be any different for the acutemp with the batteries hooked up and charged and being charged at the same time if that makes sense. No damage would occur to it and the fan wouldn't run all the time. I guess a basic trickle charger for a motorcycle is all that is needed, they use that style plug too. Great upgrade!! Not expensive either. I'd bet it could be used in the other direction as well if you can pull 12 volts from one battery for a phone charger if need be but I'd only use it that way if it were getting external power.
The batteries are independent on that side of the box. They are not in series (so not 24v) and not even in parallel. The unit will in fact run off 12/24v (even solar) thru it's internal controller. I just didn't want to push a charge thru that controller w/o knowing what it might fry.
I just top off each side with a couple small 1a NOCO chargers.
You could get two of those for half the price on a single charger that would push 5a to each.
I run this one on my LMTV and it's a great charger.
But for the smaller equipment I use the 1a chargers..