So You Own An AGM Battery...

[MEXICOWANDERER]

AGM batteries can sulfate just like any other lead acid battery. Other than by Ouija Board how would YOU determine if a battery has become sulfated and how severe is the sulfation, and if desulfation (equalization) has been done properly.

I'll make this real interesting. Let's take a bank of eight AGM batteries and attempt to sort things out.

This is not a campground test BTW. An at-home test with time and resources at your disposal. How would you handle it?

I'm going to stay out of this and see the answers until and if I am asked to participate...

[mena661]

With AGMs, probably the first indication of a problem would be capacity loss. And that will be my contribution to this thread. 🙂

[mlts22]

I'd not bother testing, but assume it is sulfated and trigger the pendant on the charger that would get it into desulfate mode.

I do this with all my batteries if I have ready access to shore power -- just plug them in to a Battery Minder, trigger the desulfate cycle and let the trickle charger do the rest. Some RV converters offer this functionality as well.