Help me Fix "Sleepy" Cells in my New Battery Bank

[Vic]

Matrix,   you noted,  "   ...   20 min after last EQ
- Battery 1 - 6.88v: 1299 taken from Center cell (positive to inverter)
- * Battery 2 - 6.88v: Lowest - 1295 / 1291 / 1290 All cells (This is still the "sleepy" battery)
- Battery 3 - 6.90v: Highest - 1305 taken from cell closest to negative post
- Battery 4 - 6.88v: 1302 taken from center cell (negative to inverter)   ...".

IF your SG readings are accurate (have you read and followed that Surrette Battery Article on Measuring SGs, ?).   Also,   you should probably wait 1 - 2 hours after the end of EQ (but when the batteries are still being Floated,  to measure SGs.   EQing can cause plate debris to circulate in the electrolyte.   This CAN cause erroneously high SG readings (BUT,  with very young batteries,  this should not be much of an issue,  as there should be little plate debris in the electrolyte ...).

IMO,   CYCLE the batteries.   AVOID charging the batteries until their actual,   measured,  SOC  is below 90%.

Flooded batteries that recharged before they are at 90% SOC,  or below,  often read higher-than 100% SOC SGs,   and this can damage the batteries.

Cycle,  cycle,   cycle,   and they should fall in-line.

Just a Drive-By.   Good Luck,   Vic

[CDN-VT]

VIC , seen this ?
http://midniteftp.com/forum/index.php?topic=3915.msg38168#msg38168

Looks like the reason is what your drive by  could be .

Quote from: Matrix on November 26, 2017, 08:39:46 PM
    It does 90 + in the bulk stage for about 1.5 hrs.  Then yes, it tappers in absorb down from 90+ to 7.5 amps over 2.5 hrs.

VT

[Matrix]

IMO,   CYCLE the batteries.   AVOID charging the batteries until their actual,   measured,  SOC  is below 90%.

Cycle,  cycle,   cycle,   and they should fall in-line.

Just a Drive-By.   Good Luck,   Vic

Thanks.  I am following you guys lead here.  Now that I have the other topic sorted out about why my charge current was so hi,  I think this will help cycling to have the charge current closer to the right charge rating of the batteries.  So  I have taken a little more of a "hands-off" approach and (other than making sure the cells are watered) I am just letting the batteries cycle without check the SG almost daily.  Discharge down to about 65%SOC and back out to 100%.  I know what the settings should be to get the charge to somewhere near 100%+ from previous testing,  so I am just doing that for now.

We actually have a cloudy day here today,  so I am charging the batteries via the electric charger at about 10% few amps than the max charge rate for the batteries.  Kind of a lower current slower charge today.  Will actually do an SG test of all cells tonight (first time in about 6 days) and see how they are doing.