MEXICOWANDERER wrote:
Where did you read AGM batteries must be charged at >14 volts?
David .... I read that everywhere, all the time, in these forums.
Also, on the labels of my AGM batteries is says something like "Recharge at 14.4 volts for Cycle Service".
I have no idea what "Cycle Service" means - if there even is an industry standard definition for it. I'm guessing that it means something like: "To help eliminate uncertainty as to whether or not one has reached a full charge after a discharge one should apply 14.X volts for the recharging voltage."
However, I'm assuming that if one is using an ammeter to determine when full charge is reached, one can use less than 14.X volts for recharging - if one has the time. (... Or if one drives long enough and often enough between camping sites so as to get alternator voltage levels applied to one's RV batteries while also monitoring with an ammeter when driving and camping.)
Another thing that I keep scratching my head over is ... for decades "common and industry knowledge" was that for best lead acid battery life, trickle charging should be used over many hours. Aren't "trickle charge" battery charger voltages usually in the 13.X range?
