AGM Battery Charging THE PRIME DIRECTIVE
I have gotten several communications about AGM battery maintenance. Using solar voltaic charging. The big error I read is that the subject of total and complete recharging is not mentioned. And tha...
Forum Discussion
BFL13 wrote:
Recharging AGMs once you get home is so easy !!!
Just set the adjustable voltage charger to 14.8 (if that is the "cycle use" spec) and make sure the charger is current- limited to no more than the spec for the battery (27 amps per 100 for my 27 format 100AH ones- so I use a 55 amp charger set to 14.8 on the pair)
Wait till amps fall to under an amp (needs an ammeter--I use the Trimetric) for under 0.5 each and then declare victory. Crank the charger down to 13.8 Floating spec and leave it all till next camping trip.
Well, as you know that's "almost" what I do with our RV's 230 AH deep cycle AGM battery bank when we get home from a trip: Set nothing and just let the stock 45 amp fixed voltage Parallax 13.8 volt converter bring the bank back to full charge per the ammeter ... no matter how many hours it takes ... and then continue leaving the converter turned on and the battery bank switch turned on while in storage. Our AGM batteries are also supposed to be floated at 13.5 - 13.8 volts.
IAW, all our AGM batteries ever see is the engine alternator and the converter (plus sometimes a little 2-10-50 Sears charger in parallel with the converter).
Our RV battery life couldn't be easier ... pretty much zero maintenance all the way around.
