Quote:
Originally Posted by benhalleniii
Quote:
"If you only want to charge the auxiliary battery just wire it directly to the auxiliary battery terminals. If you want to charge BOTH batteries from mains power, hook the AC charger to the starting battery terminals. Once the starting battery reaches over 13.2v, the BCDC will turn on and send power to the auxiliary battery also. "
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Their answer is essentially what I said… It’s still an AC to DC battery charger.
Yes, that will work. That said there are some conditions where that might not work as well as you might want it to which is why I recommended a dual channel charger. You could of course just use a single as well.
If you are charging from AC at a rate which is lower than the rate of the Redarc to the 2nd battery, you will eventually deplete the starter and hit the low disconnect voltage. Ultimately you are going to be cycling in and out of charge. If you have load on the 2nd battery, like a fridge, it wont be supported by the AC charger until the starter is satisfied. If you have a load on the starter, light factory loads, it may never be satisfied depending on your AC charger.
The solution is easy… just buy a big enough single battery charger which can support the Redarc charge current to prevent cycling. Or buy a dual channel charger.