Originally Posted by The Minimalist
Yeah, I did some reading in your manual and a call to MorningStar would be a good idea. It appears that both the jumper and switch 1 are used to set the battery type.
Though there are voltage and time factors for equalization listed for AGMs
in the Battery Setpoints chart, the manual on page 14 clearly states:
"The auto equalize feature will administer an equalization charge
(flooded battery type only) every 28 days or if the battery
discharges too low the previous night."
This statement seems to contradict the chart.
Not exactly. I use this controller and the manual is correct. Switch 3 turns auto-equalization on and off, period. If that switch is off it won't ever equalize. Switch one changes the set points, so with the jumper removed you'll either be ON for AGM or OFF for Flooded. The reason they share the ability to equalize is simply because there are only 4 switches and they chose those battery types to be represented with the jumper removed. Also, some manufacturers do state you can equalize AGMs which is likely why they chose this combination, even though most say you should never do it.
This controller is much more than a simple charge controller, it has some great features if you use the software, including updating it's firmware. It also allows you to see all of the controllers active settings, what it's doing, and what's actually occurring. With my switch 3 off it never tries to equalize, it will just push to the bulk voltage, hold it, and taper off to float after the set time period. I've watched this with the controller connected to my laptop, it acts the way it's supposed to.
Leave switch 3 off, you'll be fine.
Hope that helps.