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
From the Solar, Wind and Hydro powered office of Jeff
Oldham/Regenerative SOLutions
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