Drake Chamberlin wrote:
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.
Might want to be careful of loose connections. Maybe the MX was putting
out some high(ish) current and there
was a voltage drop across that connection, and now they are reading the
same because the current is
lower from the MX. i.e. high voltage at the terminals of the CC and
lower at the actual battery terminals.
boB
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.chamber...@redwoodalliance.org>/* wrote:
From: Drake Chamberlin <drake.chamber...@redwoodalliance.org>
Subject: [RE-wrenches] Voltage discrepancy
To: "RE-wrenches" <re-wrenches@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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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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