Genasun 10 amp 14.2v LiFePO4 MPPT charge controller.

I'm not so sure that using the GV-10 lithium 14.2v model is appropriate for most agm's.

The absorb voltage of 14.2v designed for LFP is too low for many agm's, and only applicable for most gels.  To make matters worse, there is no temperature-compensation as you would see in the Pb specific models, so cold weather charging an agm from it would be even worse.  Voltage is low and you run out of solar insolation faster at those low voltages for absorb.

It doesn't have a 2.5h absorb time limitation like the Pb models, so that is good, but the voltage is just too low for most agm's which want to see 14.4v.  Optimas and Odysseys charged at 14.2v will walk down in capacity quickly.

Speaking of which, note that the PB versions have a "sealed" setting with only a 14.3v bulk, with 14.1v absorb.  That is a tad low for agm in a cyclic application.  Top that off with a 2.5h absorb timeout, and unless you plan right, you could be walking down your agm's along with not ever getting a good absorb done in time.

But wait - there's the flooded setting, with a 14.5v bulk, and a 14.4v absorb which is much more appropriate for agm with cyclic solar.  HOWEVER, every 30 days there is an EQ of sorts to 15v, which only Optima and Odyssey spec out as their top end.  Lesser agm's may not like that 15v eq, so be careful.

Interestingly, I note that Genasun likes you to connect the panel first, and the battery last, unlike most other controllers.  It was interesting to see this in the GV10 manual.

I'm just saying that if you choose a Genasun, choose *carefully* for your intended use (float / cyclic), and battery chemistry, taking note that a flooded setting will do a 30 day 15v eq, which you want to make sure your agm is ok with.