jillhop wrote:
I may pick up a portable charger, but I don't think I'll need it. I took the coach out for about 30 minutes of driving around town this afternoon, and the battery is back up to 12.75v.
All Mex ever said was that an AGM will accept more amps at 13.8v than a Wet will, so you can get your AGM charged up faster at 13.8v than you could a Wet at 13.8v
He did not say that you could get your AGM fully charged instantly at 13.8v. It still takes the necessary amps for a long enough time (which makes AHs) to replace the AH missing from your usage. Think hours not minutes.
Be a shame to ruin that nice new AGM. You really need an AH counter like a Trimetric or the cheaper sort you can get on eBay to keep track of your state of charge, since you don't have a good grasp on the difference between surface charge voltage, loaded voltage, and resting voltage.
However, for the short time involved in this type of off-grid episode, it would be much cheaper to learn those voltages than blow $200 on a Trimetric!
