[RE-wrenches] Surrette Battery Question

[Travis Creswell]

The temp sensor suggestion makes a lot of sense.

Also, what is the specific gravity?  I suspect they are sulphated, maybe
severely.  But that's easily remedied with an equalization charge with the
generator.

We have a 24v single string of the very same batteries in an off grid system
and if they don't get at least quarterly the max charge possible from a dual
stack of SW4024's and 12kW Kohler funny things start to happen.  That's
about 200 amps depending on a few factors.  Voltage and trimetric will
indicate a full charge but the SG is way down below 50% and of course SG
typically trump other indicators. (IE, water wasn’t just added)

Warning: Be very careful about equalizing with the generator in the summer
time.  I "know a guy" who had a set HUP's do a thermal run away from "him"
just last summer and "he" really thought he was watching things closely.
Rob Shappell called "him" back at 9PM Rob's time from a birthday party on a
Friday night to explain what happened to me....er, I mean that guy I know.
Much appreciation to Rob and Jean! They are great at supporting their
product.

Travis Creswell
Ozark Energy Services

 

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Saturday, August 02, 2008 11:27 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Surrette Battery Question

I presume there is a temp sensor on the CC and inverter.

And if the battery temps are higher then the voltage termination  
would be lower which could explain it.

Or,  I have seen them get off calibration which would cause a  
difference in charge set points.

jay

peltz power


On Aug 2, 2008, at 10:29 AM, Drake Chamberlin wrote:

> Hi Allan,
>
> On a previous thread, it seems that Surrette batteries like a fast  
> charge periodically.  At one time (as I recall) is was recommended  
> to give them a C/5 once a week, but the company said that was not  
> necessary.  I don't know of C/13 to C/18 charges would be enough.   
> Can your customer run the generator for a quick charge after  
> cycling them down?
>
> Drake
>
> At 08:29 AM 8/2/2008, you wrote:
>> Did this customer check the voltage of the individual batteries/ 
>> cells? Maybe there is a weak cell developing. Sometimes EQing can  
>> take a long time. I do not "buy" that batteries need to be cycled  
>> to stay healthy.
>>
>> Todd
>>
>> jay peltz wrote:
>>
>>>
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