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boB, <br><br>
Thanks, I will check all connections when I get out there. Is
there anyway a loose connection could cook the batteries? <br><br>
Thanks,<br><br>
<br>
Drake<br><br>
<br>
At 03:16 PM 8/14/2010, you wrote:<br>
<blockquote type=cite class=cite cite="">Drake Chamberlin wrote:<br>
<blockquote type=cite class=cite cite="">I called her back just now, and
the voltage readings on the Mate, MX and Trimetric all match.
Humm. <br><br>
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. <br>
</blockquote><br>
Might want to be careful of loose connections. Maybe the MX was
putting out some high(ish) current and there<br>
was a voltage drop across that connection, and now they are reading the
same because the current is<br>
lower from the MX. i.e. high voltage at the terminals of the
CC and lower at the actual battery terminals.<br><br>
boB<br><br>
<br><br>
<br><br>
<blockquote type=cite class=cite cite=""><br>
At 12:12 PM 8/14/2010, you wrote:<br>
<blockquote type=cite class=cite cite="">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<br><br>
--- On *Sat, 8/14/10, Drake Chamberlin
/<drake.chamberlin@redwoodalliance.org>/* wrote:<br><br>
<br>
From: Drake Chamberlin
<drake.chamberlin@redwoodalliance.org><br>
Subject: [RE-wrenches] Voltage discrepancy<br>
To: "RE-wrenches"
<re-wrenches@lists.re-wrenches.org><br>
Date: Saturday, August 14, 2010, 8:58 AM<br><br>
Hello Wrenches,<br><br>
I just got off the phone with an off grid system owner
who has a<br>
voltage discrepancy showing between the reading on her
MX-60 and<br>
both her Mate and Trimetric meter. The MX-60
shows 28.8 V and<br>
the Trimetric and the Mate both show around 25
volts. The<br>
batteries are using a tremendous amount of
water.<br><br>
Has anyone seen this scenario before? Do you
think the MX-60 is<br>
bad?<br><br>
Thanks,<br><br>
Drake Chamberlin<br>
Athens Electric<br>
OH License 44810<br>
CO License 3773<br>
NABCEP TM Certified PV Installer<br>
Office - 740-448-7328<br>
Mobile - 740-856-9648<br><br>
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Drake Chamberlin<br>
Athens Electric<br>
OH License 44810<br>
CO License 3773<br>
NABCEP TM Certified PV Installer<br>
Office - 740-448-7328<br>
Mobile - 740-856-9648<br><br>
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<x-sigsep><p></x-sigsep>
<font color="#0000FF">Drake Chamberlin<br>
Athens Electric<br>
OH License 44810<br>
CO License 3773<br>
NABCEP </font><font size=1 color="#0000FF">TM
</font><font color="#0000FF">Certified PV Installer <br>
Office - 740-448-7328<br>
Mobile - 740-856-9648 </font></body>
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