Just a follow-up on this. I have able to get the batteries to accept a
higher and higher amp charge and the hydrometer indicates recovery is
taking place. However, in the last 15 hour session of charging (this
is being done in an unmonitored location overnight) the batteries off-
gassed quite a bit. The gas was very strong rotten egg smell
indicating hydrogen sulphite...not good stuff. I've never noticed this
in charging batteries in the past even in some heavy charging
scenarios you can get an acrid sulphuric smell but not the rotten egg
smell. Is this because the batteries are so heavily sulphated and is
this a normal consequence or is it an indicator of some other malady
in the batteries?
Ron Young
earthRight Solar
On 10-Jan-10, at 8:32 PM, Ron Young wrote:
Some interesting things to consider, thanks everyone!
Ron
On 10-Jan-10, at 4:20 PM, James Surrette wrote:
Hi Ron,
Given the time in "storage" the cells will be severely sulfated and
will not accept much current initially - probably 28A max (1400x2%)
and 70A (1400x5%) will suffice once current is accepted. A
standalone "unregulated" charger or constant current would be best
to reclaim these or at least get things started.
Regards,
Jamie
James Surrette
Surrette Battery Co. Ltd
1 Station Rd.
Springhill, NS, CAN
B0M 1X0
Direct: 902.597.4027
Fax: 902.597.8447
>>> Ron Young <solarea...@solareagle.com> 1/10/2010 5:52 PM >>>
I have just acquired a 24v set of 1400a/h 2v cells that have been
in storage without a charge for several years. They were connected
up in a system that was never turned on (long story). I believe
these batteries can be recovered if I can get a high enough amp
charge into them. The battery mfg. recommends putting a 200 amp
charge on until internal temp rises to 40 degrees C then let them
cool and do it again, maybe 15 times, to blow the sulphates of the
plates. Unfortunately I don't have a 200 amp charger but I do have
an Outback 3524 inverter with an 85 amp charger. I'm wondering if I
can force the inverter to maximum charge to accomplish this. I
hooked the inverter up but the batteries only have about 10.5 v
output from the batteries (hooked up 12 in series for 24v). For
this reason the Outback won't power up. I am wondering about using
a standalone charger to provide power to the batteries -- which
will also provide power to the inverter -- and allow it to come on
and charge. Anyone suggest a better way?
Ron Young
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