Rogue MPPT, 490W and charging mysteries

full_mosey wrote:

What tells you that they are not performing?

2)Battery: AGM 100 AH by UPG aka Universal Battery. I have 3 of them, they survived Mexican heat, losing 25% in 8 months, Voc=12.45, put one on charging. Shortly after hooking up it went into Abs, so much for 490W system. I set I abs=1A min, since it's 100AH, and Abs time to 4 hours - pure charging, no loads. Some clouds on the first day, current never went over 7A, - well, it's Abs. Had to reset the Abs timer a few times, and by the end of the NEXT day it was still at 1.5A. So I gave up and put darn AGM on 8A load - 12V 100W bulb.

3) Testing AGM 100 AH. Like I said, it spend more than 8 hours in Abs. Next day battery Voc=13.05. Surprise #3: V on load = 12.45. This is 83%. What the heck? It was 75% before 2 days of charging. Alright, let the real SOC test commence. V load dropped from 12.45 to 12.0 (=50% SOC under load) after 4.75 hours. This is 38 AH. So it was 76% full after it has been charged to 1.5A min.

Does that look normal to you? Man, I REALLY wish I had some you guys money I'd would've gotten some Rolls Surrette AGMs, 1000W of solar, Victron 5kVA inverter/charger, and paid AM Solar to install it all. Then I would've cracked open a beer and just sat there observing it all.