Mixing Batteries on Float-- Mex Test Update 2
UPDATE 1 on 23 Dec post UPDATE 2 on 25 Dec post ---------- Mex is driving me crazy! He said do not mix my used 12s (Scrubber batteries, he calls them--humph! They are respectable golf car batte...
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I should do this same thing with my four 6s in series parallel, now all on a float as one big 12.
I found the test where I had done this before to check self-discharge rates on my 27DCs I had back then. Could be used for comparison with these used T-1275s, to help verify the results in a few days:
Posted: 11/29/10 09:21am Link | Print | Notify Moderator
So three "identical" 27s banked for a month and floated at 13.4v did ok, SG held up. Did a cycle down to 75% anyway (not needed)and recharged to 16+ volts recovery method, now trying other way. Separated batteries and let sit. Only 10 days in but interesting results so far.
Voltages by batteries No 1,2,3 where 1 and 3 are from 5/08 and 2 is from 3/10. (EDIT Perhaps I had that mixed up and the last was the newer battery)
Was 13ish volts next day after removing charge to 16+ so start with day after that by Day number:
1- 12.86, 12.87, 12.89
2- 12.83, 12.82, 12.88
3- 12.80, 12.78, 12.86
4- 12.79, 12.76, 12.85
5- 12.78, 12.74, 12.85
6- 12.78, 12.74, 12.84
7- 12.78, 12.74, 12.84
8- 12.77, 12.73, 12.83
9- 12.77, 12.73, 12.83
14- 12.76, 12.72, 12.82
20- 12.74, 12.71, 12.80
All SGS still ok, no sign of lower than when started. (1.275ish--slight variations among cells--the SG of the higher voltage battery 3 is same as the others)
I found the test where I had done this before to check self-discharge rates on my 27DCs I had back then. Could be used for comparison with these used T-1275s, to help verify the results in a few days:
Posted: 11/29/10 09:21am Link | Print | Notify Moderator
So three "identical" 27s banked for a month and floated at 13.4v did ok, SG held up. Did a cycle down to 75% anyway (not needed)and recharged to 16+ volts recovery method, now trying other way. Separated batteries and let sit. Only 10 days in but interesting results so far.
Voltages by batteries No 1,2,3 where 1 and 3 are from 5/08 and 2 is from 3/10. (EDIT Perhaps I had that mixed up and the last was the newer battery)
Was 13ish volts next day after removing charge to 16+ so start with day after that by Day number:
1- 12.86, 12.87, 12.89
2- 12.83, 12.82, 12.88
3- 12.80, 12.78, 12.86
4- 12.79, 12.76, 12.85
5- 12.78, 12.74, 12.85
6- 12.78, 12.74, 12.84
7- 12.78, 12.74, 12.84
8- 12.77, 12.73, 12.83
9- 12.77, 12.73, 12.83
14- 12.76, 12.72, 12.82
20- 12.74, 12.71, 12.80
All SGS still ok, no sign of lower than when started. (1.275ish--slight variations among cells--the SG of the higher voltage battery 3 is same as the others)
