[RE-wrenches] Voltage discrepancy

[Drake Chamberlin]

I called her back just now, and the voltage readings on the Mate, MX 
and Trimetric all match.  Humm.

The batteries are 4, 4 1/2 year old, U.S. Battery L-16s wired in 24 
volt configuration.  It seems that I remember postings of Wrenches 
having problems with these batteries.  There is about 1 KW STC of PV 
on the roof.



At 12:12 PM 8/14/2010, you wrote:
>Any way she can get a real voltmeter?  the MX60 has voltage 
>calibration, so does the FX  it sounds like something is over 
>charging, perhaps the generator run?   additonal details on battery 
>bank size, array size and typical load.
>
>Darryl
>
>--- On Sat, 8/14/10, Drake Chamberlin 
><drake.chamberlin at redwoodalliance.org> wrote:
>
>From: Drake Chamberlin <drake.chamberlin at redwoodalliance.org>
>Subject: [RE-wrenches] Voltage discrepancy
>To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
>Date: Saturday, August 14, 2010, 8:58 AM
>
>Hello Wrenches,
>
>I just got off the phone with an off grid system owner who has a 
>voltage discrepancy showing between the reading on her MX-60 and 
>both her Mate and Trimetric meter.  The MX-60 shows 28.8 V and the 
>Trimetric and the Mate both show around 25 volts.  The batteries are 
>using a tremendous amount of water.
>
>Has anyone seen this scenario before?  Do you think the MX-60 is bad?
>
>Thanks,
>
>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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