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
Screwy 31 had been cycled to 50 to 70 AH from full, and inadequate solar had it merely approaching 10AH from full for several days in a row.
Yesterday, Received MeanWell Power supply RSP-500-15 and assisted the solar in bringing to and holding 14.9v. Solar was providing 8amps MW was providing 8amps
The battery is requiring higher amperages to reach and hold certain voltages. I've been noticing even when I reach 14.9 before noon via solar alone, the amps do not taper as quick as before and the full 2.5 hours passes before it tries to goto finish at 15.3v, but usually cannot get it there. A while ago the amps required to hold 14.9 tapered below the threshhold of about 1.8 amps, and triggered finish voltage well before 2 hours.
--
When combo amps had tapered to 4 to hold 14.9v, I tweaked the MW to 15.3v, and took a reading.
1.273, 1,282, 1,285.
Surprisingly high.
20 minutes later
1.280, 1.287, 1.290.
I twisted the pot to 16v but 12 amps were required to hold it there, twice what usually is required, so back to 15.3v
10 minutes later
1.283, 1.287, 1.290.
Tried 16v, still needed 10+ amps to get there, left it for 2 minutes, tapered to 7 amps
1.283, 1.287, 1,290
Twisted pot to 16.5v, 16 amps, back to 15.3v, 3.8 amps.
Called it finished.
Electrolyte still clear, a little over 1cm below the hanging arms.
Amperage requirements to bring battery to and hold certain voltages are changing, increasing. SG seems to be approaching upper limits with lesser voltages.
Overnights slightly cooler, but daytime temps are still warm. This difference cannot be attributed to temp alone.
Yesterday, Received MeanWell Power supply RSP-500-15 and assisted the solar in bringing to and holding 14.9v. Solar was providing 8amps MW was providing 8amps
The battery is requiring higher amperages to reach and hold certain voltages. I've been noticing even when I reach 14.9 before noon via solar alone, the amps do not taper as quick as before and the full 2.5 hours passes before it tries to goto finish at 15.3v, but usually cannot get it there. A while ago the amps required to hold 14.9 tapered below the threshhold of about 1.8 amps, and triggered finish voltage well before 2 hours.
--
When combo amps had tapered to 4 to hold 14.9v, I tweaked the MW to 15.3v, and took a reading.
1.273, 1,282, 1,285.
Surprisingly high.
20 minutes later
1.280, 1.287, 1.290.
I twisted the pot to 16v but 12 amps were required to hold it there, twice what usually is required, so back to 15.3v
10 minutes later
1.283, 1.287, 1.290.
Tried 16v, still needed 10+ amps to get there, left it for 2 minutes, tapered to 7 amps
1.283, 1.287, 1,290
Twisted pot to 16.5v, 16 amps, back to 15.3v, 3.8 amps.
Called it finished.
Electrolyte still clear, a little over 1cm below the hanging arms.
Amperage requirements to bring battery to and hold certain voltages are changing, increasing. SG seems to be approaching upper limits with lesser voltages.
Overnights slightly cooler, but daytime temps are still warm. This difference cannot be attributed to temp alone.
