Posts: 2753
Location: Mauston, Wisconsin | Re. AGM's - Most can typically handle higher charger rates, however, the charger has to have temperature compensation to prevent thermal runaway at temperatures above 77F. If that happens in your boat you won't be happy camper..... You also don't want to equalize them, like you do with a wet-cell battery. Get a charger designed for AGM's. I stay at 15A as a max limit, even though you can push higher on a typical 100AH AGM. For smaller AGM's for portable fish finders, camera's etc. be very careful to not exceed ~ 20% of the AH rating.
A good rule of thumb is your charger should be rated between 5% and and 20% of the AH rating. On a typical 100AH AGM this is between 5A- 20A.
Have fun!
Al |
