Magnum MS2812 'Absorb Done' settings

full_mosey wrote:

Smitty77 wrote:

...
So 3 hrs Absorb End Time - 2 hrs 15 mins = 45 Mins early termination of Absorb cycle? (THAT IS WHAT CONFUSED ME. And why I started thinking Absorb End of 4 Amps might be the better way to go...).

Fun, fun...
Smitty

MI have a Magnum MMS-1012 and have observed similar behavior. Mine has a fixed 4hr ABS but it also shuts ABS down early like yours. Apparently the timer is a secondary method of shutting ABS off so you don't have a runaway ABS stage.

My biggest problem is that the ABS stage is only available when first powered up. After that, it is stuck in Float at 13.6. Worse yet, after the 4hrs Float it goes into standby mode. In standby, it waits for the Volts to drop below 12.9V and then it repeats Float again.

This is irksome because sometimes I need the 50A for bulk/abs charging but the solar has already raised the Volts above 12.9V. At this point, even if I restart the MMS, it goes straight to Float. I can't force 14.4V! If I need the 50A I must start the MMS early AM or late PM when I can catch the bank below 12.9V.

In contrast, the SS MPPT 15L solar controller will cycle through bulk/abs/float every day. Plus, I can restart it at will during the day and it will go through a complete cycle again.

HTH;
John

John - One of the things I did while trying to save my previous just over 5 year bank of L16's Lifelines was to change the Equalize Voltage down to where I wanted it (14.3V) and then set off an Equalize phase. I had my Equalize time set to 4 hours for what I was trying to do, and ran it repeatedly at that voltage for quite sometime trying to get the Tapering Amps to drop down to 4 A. But you could set ti for 3 hours, or whatever, if you wanted to start a long Absorb by tricking the Magnum using the Equalize.

Best,
Smitty