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Post by wisconsinjoe on Aug 6, 2021 7:18:16 GMT -8
I'm hearing some conflicting information regarding AGM batteries. Aside from boondocking, should they be kept on a charger always? Or, should they be allowed to "rest?"
I have my system on a high quality charger/converter (IOTA -IQ4, with smart trickle charge). I had an identical charger on our Friendship trailer that we recently sold. But I had stored it for almost a year without a charger on the battery (7 years old) and found that it didn't keep a charge. Had to replace it before selling.
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Post by vikx on Aug 6, 2021 11:02:30 GMT -8
AGM and gel cel batteries do not like to be overcharged. They are sensitive and altho don't require the same maintenance a lead acid does, do require care. I vote for a "rest" with AGM batteries, actually all batteries.
I'm still stuck with the old lead acid batteries. They take abuse well and last for years if on a maintainter with a float cycle. My elderly JD lawnmower is going on lead acid battery #3, each lasting 10 years.
I take care of all my batteries the same way. In cold weather, I put every battery on a quality maintainer. (trailers, lawn mowers, vehicles) If difficult to use a maintainer, I charge overnight at least once a month. During warmer months, charging every 2 or 3 months suffices. I don't like using RV converter/chargers because I don't trust them. The "smart" part of the charging system can fail and ruin a battery without warning. Using a timer for an hour each day would probably keep a battery topped off in lieu of a maintainer.
From what I've been told, the new lithium battery systems are the way to go. They provide power for a long time, even when running inverters. One friend is running his dorm fridge, 12volt lights and water pump for several days at a time. Of course he PAID for the system-about $3000. Overkill for most of our trailers.
Lastly, batteries like to work. A charge and discharge cycle keeps them alive.
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