2 + 1 battery charging???

Rbertalotto wrote:

My controller doesn't care what type of battery. wrote:

Then how does it know when the battery is at 100% charge? Or does it not give you that information?

Here we go again.

Controller doesn't know when the battery is 100% full. AH counting is not an accurate method.

The only true measure is SG. But with AGM you're out of luck, naturally.

Another reliable indicator (IMO) is when the charging current drops - in theory, at least - to zero. In reality there is always self-discharge current (very low in case of AGM), plus some parasitic current. So it's good enough when charging current drops to that value, in absence of loads. Let's say, you lights are off 'cause it's daylight and fridge is not cycling right now (or you know the fridge current because you know it).

This is what "fully charged" is about - the battery can't accept more charge. Then controller will stop charging it. It can't charge it when battery doesn't t accept charge.

You may or may not get to this point when camping. What is important, is not to fry the battery prematurely by setting Abs too high, or keeping it in Abs for too long, or setting Float too high. And not to undercharge it either, by doing all the opposite things.

BFL13 with his semi-automatic controller (one of them, as I recall) is doing this manually, according to battery specs, loads and what he has learned after having his battery for a while and checking SG.
My controller is doing it automatically by keeping settings where they should be, according to battery specs, loads and charging current (and few other things, but let's keep it simple for now).
Your controller (or, rather, your Trimetric monitor that controls the controller) is doing this by counting AH and adjusting settings based on this count, as I understand. Hopefully it takes into account some other factors, like battery specs (exactly specs, not "battery type"), and charging current.

You'll figure out, no worries.