<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Not sure if it's already been brought up or not.. but you might want to recheck all connections.. just to eliminate that issue.. db<br></div><div><br></div><div><br>Dan Brown<br>Foxfire Energy Corp.<br>Renewable Energy Systems<br>(802)-483-2564<br><a href="http://www.Foxfire-Energy.com">www.Foxfire-Energy.com</a><br>NABCEP #092907-44</div><div><br><br></div>
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-------- Original Message --------<br>
Subject: Re: [RE-wrenches] Voltage discrepancy<br>
From: boB Gudgel <<a href="mailto:boB@midnitesolar.com">boB@midnitesolar.com</a>><br>
Date: Thu, August 19, 2010 8:09 pm<br>
To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
<br>
Jeff Oldham wrote:<br>
> I have seen this on my last 3 MX60 controllers and it is very <br>
> frustrating and looks to be a design flaw. I can calibrate the meters <br>
> to be accurate at either the Absorb point OR the Float point but NOT <br>
> both!! Not only that but the meter calibrations tend to drift a bit in <br>
> just a matter of days, just .1V not a big deal but anymore than that <br>
> on a 12V sealed battery and it could be an issue. I spoke w/Outback <br>
> about this and heard a mumbled "Ahh, uummm, yeah that is an issue". <br>
> I'm guessing that you're seeing the same thing and when you spoke <br>
> w/your customer again and the meters all agreed I'll bet it is because <br>
> the MX was at the "line up point" of the other meters (just like a <br>
> broken clock being correct twice a day!). The only way to live with <br>
> this is to get the more important Absorb set point right on and take <br>
> what you get on the lower end. It works and is usable but drives <br>
> customers nuts when they have additional meters. In my experience the <br>
> Tri-mets are dead on.<br>
><br>
<br>
Jeff, what size wire from charge controller to the battery are you using <br>
?? The bigger the wire, the less the<br>
I*R drop and the less the voltage discrepancy ~should~ be, at higher <br>
currents.<br>
<br>
boB<br>
<br>
<br>
<br>
<br>
><br>
> From the Solar, Wind and Hydro powered office of Jeff <br>
> Oldham/Regenerative SOLutions<br>
><br>
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