AGM Adventures- Update
Updated 31 Jan 17 Initial results. I will re-test the AGM after it does one deep cycle to confirm these results. EDIT completed 6 Oct Test was to put the test battery as the only battery run...
Forum Discussion
No I didn't take any temps, sorry. My IR gizmo is not much for pin-pointing. It is good for the back of a solar panel or whatever.
Good thought about the inverter caps. Yes I am used to the big spark. I don't know if that would explain it or just a slow initial chemical reaction in the new and possibly stratified batt. Anyway, the voltage came back.
Ok, so finished running the batt down and ready to recharge, I drew it down with 15 amps (20 hr rate is 5 amps) and waited till the Trimetric said it was down 50AH.
Interesting thing is at 50AH down and the 15a draw, voltage at the batt was 11.72. When I do my usual 20hr rate tests on my Flooded batts, voltage is 11.6 at 50% before bouncing back to 12.1
That suggests this AGM does hold its voltage higher under load.
After 30 minutes voltage came back to 12.04 and stopped rising. So that means I overshot 50% by some amount. Peukert says that will happen. Also new batt might not be up to rating yet--needs more cycles. Both most likely.
According to the spec sheet linked above, I might be at 35-40% SOC hard to say. Doesn't matter, idea is to get a deep cycle done, so now on with the recharge. Unfortunately I can't record the AH restored with the Vector since it is not part of the 5er set-up with the Tri. Idea is to get the batt to "full" and try the load tests again.
Good thought about the inverter caps. Yes I am used to the big spark. I don't know if that would explain it or just a slow initial chemical reaction in the new and possibly stratified batt. Anyway, the voltage came back.
Ok, so finished running the batt down and ready to recharge, I drew it down with 15 amps (20 hr rate is 5 amps) and waited till the Trimetric said it was down 50AH.
Interesting thing is at 50AH down and the 15a draw, voltage at the batt was 11.72. When I do my usual 20hr rate tests on my Flooded batts, voltage is 11.6 at 50% before bouncing back to 12.1
That suggests this AGM does hold its voltage higher under load.
After 30 minutes voltage came back to 12.04 and stopped rising. So that means I overshot 50% by some amount. Peukert says that will happen. Also new batt might not be up to rating yet--needs more cycles. Both most likely.
According to the spec sheet linked above, I might be at 35-40% SOC hard to say. Doesn't matter, idea is to get a deep cycle done, so now on with the recharge. Unfortunately I can't record the AH restored with the Vector since it is not part of the 5er set-up with the Tri. Idea is to get the batt to "full" and try the load tests again.
