Yes, I have a Lester that I use on a 24-volt setup with AGMs. Yes, Lester says they would not recommend this charger for AGMs. I suspect the reason is that the charging voltage exceeds 14.6V, which is the limit for AGM batteries according to some manufacturers, to avoid overheating, according to the internet. I, however, like my Lester charger, it charges fast, the batteries dont get hot, and Im not real worried about what the internet says, or battery charger manufacturers for that matter, or battery experts for that matter. Ill just see what happens. So far so good.Steve