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Author Topic: Battery advice  (Read 5255 times)
Adam
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« Reply #15 on: November 20, 2008, 07:00:53 PM »

Cell not charging much, think most of my power was wasted on the rheostat Roll Eyes

This afternoon i had a change of plan instead of reducing the chargers output i reduced the input buy connecting it to a 110v site transformer with a small adapter, the charger is a large automotive type with 4 settings low, high, boost & start, with the charger connected directly to the cell i can get a healthy 12amps into the cell on boost.

The voltage on the cell tonight is 2.13 all the good cells are 2.20 so getting there but it's taking a long time  Roll Eyes

Thinking about it, 12amps @ 2v is not alot of power Huh

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Adam
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« Reply #16 on: November 23, 2008, 11:49:49 AM »

When is a cell knackered?

After charging the cell a 2 days ago for 12 hours at 12amps the voltage of this cell is 0.08 - 0.10 lower than the other's, is it knackered?

Even with a week of no wind and no current draw on the battery the overall votlage of the battery dosen't fall.
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northern installer
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« Reply #17 on: November 27, 2008, 12:11:48 PM »

Adam,the amps as shown will be the charging amps its the excess wattage from your 12 volt supply that is being dissipated in the rheostat;I think you have given this battery every chance,looks like its time to replace it Sad
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"government scrappage scheme still available on Tardis trade ins (dont ask how we get around the deadline...)"
Adam
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« Reply #18 on: November 30, 2008, 09:52:16 PM »

I managed to get rid of the rheostat (see post above Wink)

I gave it a good charge at 12 amps, and voltage has dropped again as you said i have given it every chance possible luckly i have 14 spare cells think most are good, was going to make a second battery but i think it's best to use the cells to keep one battery good.

When i get a chance i will get them swapped over.

I have had no wind for 3-4 days, not used the battery and the overall battery voltage has not budged, yet when i had my leisure batterys the voltage would drop day by day even when they were only 12month's old.
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Adam
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« Reply #19 on: December 08, 2008, 07:15:25 PM »

Got 2 faulty cells swapped over tonight in the dark, used some squashed 15mm copper pipe to join them together, drilled a 5.5mm hole into the lead and a m6 bolt screws in nicely Wink Still one other cell 0.08v lower than the rest, not too worried but will keep an eye on it, got 12 spare cells thou Grin.

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billi
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« Reply #20 on: December 08, 2008, 07:36:40 PM »

Adam

looks  like a smallish  leisure  battery you have their and easy to lift by two men  Grin




Heavy Christmas

Billi


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1.6 kw and 2.4 kw   PV array  , Outback MX 60 and FM80 charge controller  ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw  windturbine
Adam
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« Reply #21 on: December 08, 2008, 08:06:32 PM »

 Grin
I cheated! used my forklift to lift them out  Wink
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