My Screwy 31
First off let me say I am not stressing over this. It's just a battery, it is only money, it is meeting my overnight needs, but it is displaying strange behavior, and I am curious as to why. So th...
Forum Discussion
I released that 15.0v max hold, so now it spends a portion of each afternoon back at 15.3v after 2.5 hrs at 14.9 ABSV or when amps required to hold 14.9 ABSV drop below 1 amp per 100 amp hours of battery. The overnight voltage holds noticeable higher under load than before with the 15v max.
I gave it about an hours worth of 16v yesterday. Took 7 amps to reach 16v, tapered down to 4.5a, but then started rising again to the mid 5 amp range when I terminated EQ cycle. No dipping.
I had plenty of daylight left, an hour later cranked it back upto 16v. 5.5 amps required to bring it to 16v, and then tapered to 4.4a 20 minutes later when I ended EQ cycle. No dipping as I was parked next to Mother Pacific.
Right now, 3:47 AM 57 amp hours from full, 4.4 amp load, 12.1 volts.
This thing is holding better voltage compared to when it was a month old and allowed only 14.5ABSv for 90 minutes.
I'm now at about 250 cycles on this 31, and I think at this point, it is behaving admirably.
This 31 is being worked hard, the solar is working well to replenish what I use, Eff, my whole electrical system is working pretty dang good. Nice to have grid power available when Cloudy all day for 2 days (+) though.
Alternator contributions when depleted, while short lived, really seem to make the ABS amp threshold come a bunch sooner, and 15.3 float/finish comes earlier, and then overnight voltage raises a proud eyebrow.
----------
Mex, what is going on internally when the amps required to hold 16V taper normally from 6 to about 4, but then start to rise again to 5 or more. I've been ending the EQ when I notice the amps start rising. This is the 4th time I've noticed amps required to hold 16v drop as expected, but then start rising again.
I assumed the longer 16V was held, the less amps would be required to hold 16v, but a few times now I've noticed amps starts rising again, and figure that when this happens I went too long and the battery is heating excessively or doing something undesirable.
----
Anyway I'm hammering this battery under discharge each and every night, and allowing these unconventionally high voltages last for most of the afternoon each and every day, and the battery is apparently thumping its chest and calling me the wuss.
Who hoo!
Considering 8 months ago I wanted to sling this battery violently through the manufacturer's windows with a hate note attached.
I gave it about an hours worth of 16v yesterday. Took 7 amps to reach 16v, tapered down to 4.5a, but then started rising again to the mid 5 amp range when I terminated EQ cycle. No dipping.
I had plenty of daylight left, an hour later cranked it back upto 16v. 5.5 amps required to bring it to 16v, and then tapered to 4.4a 20 minutes later when I ended EQ cycle. No dipping as I was parked next to Mother Pacific.
Right now, 3:47 AM 57 amp hours from full, 4.4 amp load, 12.1 volts.
This thing is holding better voltage compared to when it was a month old and allowed only 14.5ABSv for 90 minutes.
I'm now at about 250 cycles on this 31, and I think at this point, it is behaving admirably.
This 31 is being worked hard, the solar is working well to replenish what I use, Eff, my whole electrical system is working pretty dang good. Nice to have grid power available when Cloudy all day for 2 days (+) though.
Alternator contributions when depleted, while short lived, really seem to make the ABS amp threshold come a bunch sooner, and 15.3 float/finish comes earlier, and then overnight voltage raises a proud eyebrow.
----------
Mex, what is going on internally when the amps required to hold 16V taper normally from 6 to about 4, but then start to rise again to 5 or more. I've been ending the EQ when I notice the amps start rising. This is the 4th time I've noticed amps required to hold 16v drop as expected, but then start rising again.
I assumed the longer 16V was held, the less amps would be required to hold 16v, but a few times now I've noticed amps starts rising again, and figure that when this happens I went too long and the battery is heating excessively or doing something undesirable.
----
Anyway I'm hammering this battery under discharge each and every night, and allowing these unconventionally high voltages last for most of the afternoon each and every day, and the battery is apparently thumping its chest and calling me the wuss.
Who hoo!
Considering 8 months ago I wanted to sling this battery violently through the manufacturer's windows with a hate note attached.
