MX60 Tone Generator [RE-wrenches]

[Christopher Freitas --- OutBack Power]

Ray - 

This noise issue is caused by the windings of the inductors vibrating 
slightly when the MPPT voltage of the PV array and the battery are very 
close to each other - we have been glueing the windings onto the 
inductors which nearly eliminated it from being a problem - is this one 
perhaps an old stock unit?  I can arrange an exchange for the customer 
if that would help.  

This setting "trick" forces the operating voltage (MPPT) to stay a few  
volts above the battery voltage level - which will result in a very 
small amount of power reduction from the PV array - but only when the 
battery is close to full state of charge or while equalizing - which  is 
not really an issue as usually the battery will not accept the PV arrays 
output while absorbing or EQ'ing anyways.  It will not impact the 
performance of the PV array in the when the battery voltage is low or 
during winter time as the MPPT voltage will be higher because of the 
lower PV cell temperatures.  

Most of the time the noise will occur only once in a while when we do a 
wider sweep routine to ensure that we are truely on the correct MPPT 
point - this trick then just restricts the range of the sweep and then 
will not result in any power loss.  
 
Christopher


Four Winds wrote:
> 
> This is a very obscure little trick that the MX-60 can do and it can  
> be turned off via the deep, down, super secret menu in the MX-60. I
> was told that what you hear is the MPPT in action....
>
> Go to the Status menu
> Hold the Exit button down
> While holding this, hold button #3 down
> Select on or off with button #2



Christopher Freitas
OutBack Power Systems, Inc.
cfreitas @ outbackpower.com  
www.outbackpower.com
Arlington WA USA
Tel 360 435 6030  


- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------