[RE-wrenches] Voltage discrepancy

[Drake Chamberlin]

Correction: it is number 6 to the charge control, and 3/0 or 4/0 to 
the batteries.


At 09:40 AM 8/20/2010, you wrote:
>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
>>
>>
>>
>>
>>>
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>>> Oldham/Regenerative SOLutions
>>>
>>>____________________________________________________________
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>>
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>Drake Chamberlin
>Athens Electric
>OH License 44810
>CO License 3773
>NABCEP TM  Certified PV Installer
>Office - 740-448-7328
>Mobile - 740-856-9648
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Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM  Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648  
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