Quote Originally Posted by viking View Post
Hey Al,
I have the Blue Seas add-a-battery too. Been charging my batts seperately while still in the boat. I noticed that when I have the switch to the "on" position that they Combine and the green LED lights up indicating so. That is pretty straight forward as it senses the charge and then combines for the process. It is the same when the engine is running and alternator is charging.

However, I switched it to "OFF" over the weekend to seperately charge them and the green LED still came on after a few moments indicating they were combined? I got a little puzzled? Any input?
viking,

The battery switch does not turn off the ACR. You have one cable going from the ACR to one battery and another cable from the ACR to the other battery. Turning the switch to "OFF" does not change that so the ACR is still sensing the charging current and combines the batteries once the battery your charger is on reaches a certain voltage.

I have a resettable breaker on each cable so when I want to charge just one battery, I open the breaker on the cable for that battery. You should have a fuse where I have a resettable breaker so you can accomplish the same thing by puling the fuse. See pic below.

[IMG][/IMG]