12V mystery
Here's one I cannot figure out. I have two AGM group 31 battery's that are about four years old. They stay plugged in when at home and I have a 2020 Trimetric monitor which I monitor often whether on ...
Forum Discussion
pianotuna wrote:
Hi deltabravo,
Because at 85% state of charge, a bank can only accept 12.5 amps per 100 amp-hours of storage. As the bank gets closer and closer to 100% that number drops off--so it may be only 4 amps at 92% state of charge.
That is why no one in their right mind attempts to fully charge a bank from a generator--the run times become huge.
It is true that tapering on charging happens later with AGM jars.
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PT you are correct. Today is Sunday and it has taken since Thursday morning to get the battery's fully charged. If one does not have Trimetric or another high tech monitor you will not know when they are fully charged. When fully charged the Trimeteric will read 0.00 which means no more amps are needed to charge the battery's. Now it will be on maintance, float whatever you want to call it.
Those plug in and a multimeter will not show when the bank is fully saturated.deltabravo wrote:
Why would it take more than 3 hours to charge that size battery bank?
