First time to 50% SOC
DW and I pigged out on amp hours on our last trip to the beach a week ago. According to the Victron, we used 364 Ah in 3 days. Oddly, the Iota did not go right to 14.8V like it did when I first connec...
Forum Discussion
Roy, something is not right with that performance as described.
You have 60amps on 255AH bank as rated---doubts about that!!!!
You get 55a instead of 60 because you have a PD in boost but we know about that "issue" so moving right along, here is what is supposed to happen:
With 55a "proper charger" on a 220AH bank doing a "50-90" you get (approx. of course--chargers/batteries vary a little)
-53 minutes of constant 55a while battery voltage rises steadily to 14ish (you report 12 minutes!!) at 72% SOC
- Amps then taper from 55a to 35a in another 26 minutes when you are at 80% SOC
-Amps taper down for another 60 minutes from 35 to 10a to 90% SOC.
Total time 139 minutes for the 50-90
Battery voltage at 12.1ish spikes to 13.4ish when charger turned on, then voltage rises steadily to 14.x before amps taper
Converter voltage stays a couple volts above battery voltage during this time, then converter voltage steadies and battery voltage keeps rising, shrinking the "spread." As the spread shrinks, amps taper.
So it looks like your 255AH is nowhere near that 255 amount, because your amps taper down so fast. Your time at constant 55 should be longer than 53 min with 255 instead of 220 as above example. This is showing even through the distraction that the PD would not perform "properly" even if the bank were in tip top shape. (never mind the PD vs other converter brands business---it is a distraction to this matter of the state of that battery bank)
ISTR Roy said his batts were on their last legs? Yep!
You have 60amps on 255AH bank as rated---doubts about that!!!!
You get 55a instead of 60 because you have a PD in boost but we know about that "issue" so moving right along, here is what is supposed to happen:
With 55a "proper charger" on a 220AH bank doing a "50-90" you get (approx. of course--chargers/batteries vary a little)
-53 minutes of constant 55a while battery voltage rises steadily to 14ish (you report 12 minutes!!) at 72% SOC
- Amps then taper from 55a to 35a in another 26 minutes when you are at 80% SOC
-Amps taper down for another 60 minutes from 35 to 10a to 90% SOC.
Total time 139 minutes for the 50-90
Battery voltage at 12.1ish spikes to 13.4ish when charger turned on, then voltage rises steadily to 14.x before amps taper
Converter voltage stays a couple volts above battery voltage during this time, then converter voltage steadies and battery voltage keeps rising, shrinking the "spread." As the spread shrinks, amps taper.
So it looks like your 255AH is nowhere near that 255 amount, because your amps taper down so fast. Your time at constant 55 should be longer than 53 min with 255 instead of 220 as above example. This is showing even through the distraction that the PD would not perform "properly" even if the bank were in tip top shape. (never mind the PD vs other converter brands business---it is a distraction to this matter of the state of that battery bank)
ISTR Roy said his batts were on their last legs? Yep!
