Thanks Jeff, That could be the explanation. Outback has metering
issues with the Mate too. When I talked to a tech support about he
fact that the Mate on my system seemed woefully inaccurate, she
chuckled and affirmed that the were pretty approximate.
-Drake
At 07:12 PM 8/19/2010, you 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.
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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