[RE-wrenches] Voltage discrepancy

[Drake Chamberlin]

boB,

It looks like 3/0 or 4/0.  It is a short run.


At 08:09 PM 8/19/2010, you wrote:
>Jeff Oldham wrote:
>>I have seen this on my last 3 MX60 controllers and it is very 
>>frustrating and looks to be a design flaw. I can calibrate the 
>>meters to be accurate at either the Absorb point OR the Float point 
>>but NOT both!! Not only that but the meter calibrations tend to 
>>drift a bit in just a matter of days, just .1V not a big deal but 
>>anymore than that on a 12V sealed battery and it could be an issue. 
>>I spoke w/Outback about this and heard a mumbled "Ahh, uummm, yeah 
>>that is an issue". I'm guessing that you're seeing the same thing 
>>and when you spoke w/your customer again and the meters all agreed 
>>I'll bet it is because the MX was at the "line up point" of the 
>>other meters (just like a broken clock being correct twice a day!). 
>>The only way to live with this is to get the more important Absorb 
>>set point right on and take what you get on the lower end. It works 
>>and is usable but drives customers nuts when they have additional 
>>meters. In my experience the Tri-mets are dead on.
>
>Jeff, what size wire from charge controller to the battery are you 
>using ??   The bigger the wire, the less the
>I*R drop and the less the voltage discrepancy ~should~  be, at 
>higher currents.
>
>boB
>
>
>
>
>>
>> From the Solar, Wind and Hydro powered office of Jeff 
>> Oldham/Regenerative SOLutions
>>
>>____________________________________________________________
>>*Notre Dame Certificates*
>>100% Online Programs in Negotiation Leadership and Mgmt. Enroll Today!
>><http://thirdpartyoffers.juno.com/TGL3132/4c6dba9db492581fb20st02vuc>NotreDameOnline.com 
>><http://thirdpartyoffers.juno.com/TGL3132/4c6dba9db492581fb20st02vuc>
>>------------------------------------------------------------------------
>>
>>_______________________________________________
>>List sponsored by Home Power magazine
>>
>>List Address: RE-wrenches at lists.re-wrenches.org
>>
>>Options & settings:
>>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>>List-Archive: 
>>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>
>>List rules & etiquette:
>>www.re-wrenches.org/etiquette.htm
>>
>>Check out participant bios:
>>www.members.re-wrenches.org
>>
>>
>
>_______________________________________________
>List sponsored by Home Power magazine
>
>List Address: RE-wrenches at lists.re-wrenches.org
>
>Options & settings:
>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
>List-Archive: 
>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
>List rules & etiquette:
>www.re-wrenches.org/etiquette.htm
>
>Check out participant bios:
>www.members.re-wrenches.org

Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20100820/9dc01478/attachment-0003.html>