battery charging voltage

pianotuna wrote:
Hi Vulcan,

I define it as what the Magnum inverter charger does in the custom battery setting. I expect it is the same as bulk, but I'm not entirely sure--and being poor I have to try to treat things the best way possible to make them last.

Vulcan Rider wrote:

pianotuna wrote:

I saw the equalize charging rate and the float--but not absorption.

Please define "absorption charging", as you understand it.

Hi PT;

I have the smaller MMS 1012 Magnum. With the RC-25 remote, it takes on an AGM charging regimen. The remote has 3 LEDs to indicate Bulk, Abs and Float. The battery is a 12V Johnson Controls 31C 100AH AGM bought at Sams Club.

I usually watch the AC input with a KAW. I attach a Turnigy to the Magnum DC terminals to observe Volts.

During Bulk, the Watts slowly increase until the Vabs is reached. I have seen the Watts rise and then hold at the maximum 1000W input rating for a period of time.

During Abs, the Watts slowly decrease and the Volts hold steady.

In Float, the Volts drop but surprisingly, the Watts don't drop as you would expect, but instead the Watts continue to decrease. This means that the Amps must rise! :@

HTH;
John