BFL13 wrote:
You need more voltage to get that SG moving up. Indicates the batteries are sulfated or stratified or whatever, so an equalization session would be needed. 16v is "normal" for equalizing, so it would depend on how far above 16.0v it goes with that charger on its 50a setting, whether it would be ok to do that.
I'd give it a whirl but be ready to shut it down. But they are not my batteries! :)
I was seeing as high as 16.3v
I'm letting them simmer on the 10a setting for now.
A little more info I didn't mention can be found here:
Sulfated crown batteries
