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
landyacht318 wrote:
Another Sunday
More Data
Since last report ABSV 14.7, 14.8 F
Checked SG once it went into Float/Finish today requiring 3 amps to hold 14.8
1.250
Raised both to 15.7v Took ~90 minutes for SG to rise to 1.280 and held there. Initial amps were 5.0, after 90 minutes were 4.1..
Another 45 minutes at 15.7, 3.9 amps and still 1.280.
Remembering I was able to exceed 1.290 last time I checked, and have not since added h20 I just now bumped voltages upto 16v.
6.4 amps are required to hold that voltage 1 minute after changing the setpoints.
Yesterday was cloudy all day and only got to 20 A/h from full, even with some alternator assist.
So it appears the lower the setpoints, which are still pretty high, the longer the EQ session needed to restore SG to the Max.
Also If 16v does at least bring 1 of the 3 cells to 1.290 or above, then 15.7v is not adequate for EQing this battery.
All 3 of the easy to check cells are reading exactly the same at every dipping today.
I underestimated the electrolyte level last report. It is higher than half way below the split rings and plates.
Excellent data points... let's hope for the best on the Specific Gravity readings.... what is today's ambient temps? Lower than the 100's last week, which would facilitate a lot of active chemical reaction capability at such high temps. Higher the ambient temps, the higher the chemical potential between battery acid and lead plates.
If it's cooler, it will take more voltage to accomplish equalization, the plates and chemistry in the H2SO4 are less reactive at colder or lower temps, offset by higher voltage to force the chemical reaction.
