- August 31, 2018 at 07:26 #25455Patrick N StrangParticipant
Last Fall, I replaced the deceased acid batteries that didn’t make it their 13th year (not a bad life), with AGMs. The solar panel was not keeping them charged, even after I had turned the battery switch off to eliminate any power drainage.
Just yesterday, I noticed a little switch on the solar panel control that said: “Gel” on the top, and “Lead Acid” on the bottom. I switched it over to gel, but my question is:
What is the difference in how the solar charges the batteries?
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- September 1, 2018 at 13:20 #25498JbellParticipant
AGM batteries require approximately the same charging parameters as lead acid batteries. Gel cell batteries require a lower charging voltage. Without knowing more about your solar system I can’t comment on why your new AGM batteries are not receiving a full charge.
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- September 2, 2018 at 10:05 #25514Mello MikeKeymaster
Jbell is right. Gel batteries are a different animal altogether. Generally speaking, AGM batteries need to be charged the same as wet cell batteries.
Getting 13 years out of a pair of wet cell batteries is excellent.
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