pianotuna wrote:
Hi Coolmom,
AGM are faster to charge and can accept current faster, but recharging any lead acid chemistry to 100% will still require MANY hours of generator run time. The trade off comes with lower total capacity. A group 27 is probably not going to be 100 amp-hours.
Mostly folks settle for 50% to 90%. If that takes say 3 hours, then getting from 90% to 97% will take an additional 3 hours. Probably 97% to 100% takes yet another 3 hours.
Probably what I'll be doing is 4-5 days dry camping at a time, at the most, followed by going home, or a couple of nights at a campground/RV park with shore power. Then I can plug the battery charger in for about 12-16 hours at a time. That should be plenty of time to get the batteries to 100%. At home, I can leave it plugged in as long as needed.
So getting the batteries to approx 90% of charge once every 5 days max time frame, then up to 100% every 5 days or so, should be adequate, from what I've read about battery life.
