How To Decrease Self Discharge When Not In Use

[Rickochet]

Originally Posted by JohnnieB

The self-discharge rate of batteries is about 1% of the SoC per day, so for 225AH batteries it is about 2.3AH per day, or a flow rate of about 0.1A. So a 36V solar charger that puts out 100 Milli-amps or more, ought to keep them charged.

Thanks for the info Johnnie. Just a curiosity question are there any other batteries in either size or chemistry that have a higher capacity?

[JohnnieB]

Originally Posted by Rickochet

Thanks for the info Johnnie. Just a curiosity question are there any other batteries in either size or chemistry that have a higher capacity?

The approximately 1%/day self discharge applies to all Lead-Acid Wet-Cell golf cart batteries. I'm not sure if AGM batteries self discharge at a higher, a lower, or at the same percentage of SoC.

Battery size (AH storage capacity) doesn't matter. The flow rate for higher AH batteries is proportionally higher, so the percent of SoC discharge stays roughly the same.

Lithium batteries have a very low self discharge rate.