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I have questions about testing a battery from one of the major solar suppliers. I've used the battery for a couple of years for occasional summer weekend camping. It is part of a small solar rig with battery, panels, charger and inverter all from the same manufacturer. The battery was stored...

The battery was purchased new in the summer of 2019. It is an off the shelf, ready to use battery from a domestic (US) supplier. I charged it to full capacity with the solar panels and charge controller just before starting the test. The inverter was connected during charging and during the...

I get that my setup isn't suitable for an accurate measurement but it seemed that I wasn't even in the ballpark. So apparently my charge controller isn't configured correctly. I'll have to dig into that some more. That makes more sense to me than the manufacturer's excuse (the inverter is too...

Thanks for the replies. I neglected to mention that the battery is one of the common 12 volt 100AH Lithium Iron Phosphate batteries. I've already replaced it with other batteries so I'm hesitant to spend any more on it. But I am curious if my test is valid or if there's some reason I...