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...
Forum Discussion
Got some results from doing Mex's test at the four day point. I can see why he said to wait four or five days.
(Trojan says 100% is 12.73v and 1.277 SG)
Starting /Day Four
Battery A 13.43v/12.66
Battery B 13.40v/12.61
Battery A 1.275,75,70,90,75,75/ 75,75,70,85,75,75
Battery B 75,75,1.300,75,75,75/ 70,70,90,70,70,70
I don't know what all that means exactly :( Opinions welcome!
I am a bit concerned that the voltage has dropped so quickly. The 27DCs were from 12.78 to 12.86 at this point and were still at the 12.71-80 level after three weeks sitting disconnected. However the 27s were starting /deep cycle and these T-1275s are deep cycle, so that might account for some of the difference there.
For additional comparison I am running a similar test on my four 6s. Two days after the day they were disconnected) they are still above 13v. All SGs are 1.295-1.300. (subtract 0.0025 if you are fussy about temperature) They have been on 7355 float (13.7v) for the last several weeks before being disconnected to do this test.
I intend to leave them all disconnected for another week to see if the T-1275s stop dropping in voltage so fast. (They have clean tops and all that)
They do "hold a charge" ok while camping. They have been running the 2000w inverter as its battery bank, taking 100a draws with no trouble, doing great. I am surprised to see their voltage drop so quickly when not doing anything!
(Trojan says 100% is 12.73v and 1.277 SG)
Starting /Day Four
Battery A 13.43v/12.66
Battery B 13.40v/12.61
Battery A 1.275,75,70,90,75,75/ 75,75,70,85,75,75
Battery B 75,75,1.300,75,75,75/ 70,70,90,70,70,70
I don't know what all that means exactly :( Opinions welcome!
I am a bit concerned that the voltage has dropped so quickly. The 27DCs were from 12.78 to 12.86 at this point and were still at the 12.71-80 level after three weeks sitting disconnected. However the 27s were starting /deep cycle and these T-1275s are deep cycle, so that might account for some of the difference there.
For additional comparison I am running a similar test on my four 6s. Two days after the day they were disconnected) they are still above 13v. All SGs are 1.295-1.300. (subtract 0.0025 if you are fussy about temperature) They have been on 7355 float (13.7v) for the last several weeks before being disconnected to do this test.
I intend to leave them all disconnected for another week to see if the T-1275s stop dropping in voltage so fast. (They have clean tops and all that)
They do "hold a charge" ok while camping. They have been running the 2000w inverter as its battery bank, taking 100a draws with no trouble, doing great. I am surprised to see their voltage drop so quickly when not doing anything!
