[RE-wrenches] High specific gravity

[Jerry Shafer]

I would stop there and see if it is corrected. I have seen high SG when
there is little or no boil offand water is not added, if someone has added
acid the SG is not usable. You can use the entire system as it is a load
tester turn off the pv, gen set and the wind put a 2 k load (ac) on the
system and keep in on for some time now check the voltage at each battery
this can show a poor or failing battery without the use of a carbon pyle or
resistive load dump. I have done this with my off grid system and it works
well.
Jerry
Hi Jerry,

I think his issue was the generator was starting at around 4-5am on some
days.  I think this may have been a programming error, I lowered the start
voltages on the AGS.


On Tue, Aug 12, 2014 at 8:12 PM, Jerry Shafer <jerrysgarage01 at gmail.com>
wrote:

> does your customer have any issues or is this a first inspection type call
> just to see
> Jerry
>
>
> On Tue, Aug 12, 2014 at 3:54 PM, Mac Lewis <maclewis1 at gmail.com> wrote:
>
>> Hello wrenches,
>>
>> I just went on a service call for a new client.  He had a bank of 4 year
>> old Interstate L16HCL batteries, 2 strings of 8, 48V system, 840Ahr.  We
>> went through the batteries and got specific gravity on all of the cells
>> post-equalization.  I was a bit surprised to see some very high numbers ie
>> over 1.32 for the specific gravities (higher than my refractometer goes).
>>  The specific gravities were all over the place, but I haven't seen numbers
>> this high.  I don't have a great explanation.  He has a stacked 3648 VFX
>> Outback system, and the set-points were 58.8V Absorb for 2 hours, and 62V
>> Equalize for 2 hours.  He has a decent amount of solar (about 3400W) and a
>> 1000W wind generator.
>>
>> Any ideas why the specific gravity is so high on some cells?  Also, is
>> there anything wrong with having SG this high, post-equalization?  For this
>> very standard battery, what settings do you go with (Bulk, Absorb, Float,
>> Eq, and times for Abs and Equalization).
>>
>> Thanks in advance
>>
>>
>>
>> --
>>
>>
>>
>> Mac Lewis
>>
>> *"Yo solo sé que no sé nada." -Sócrates *
>>
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-- 



Mac Lewis

* "Yo solo sé que no sé nada." -Sócrates *

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