MPPT arrays in different directions [RE-wrenches]

[Eric Smiley]

MPPT depends on the maximum power point voltage of the array. Since
voltage varies only slightly with irradiance, in theory it is possible
to track three arrays facing different directions without too much of a
performance loss. However, if the arrays are at different temperatures
due to different irradiance levels, MPP voltage will be different for
each array and the performance loss will be greater.

For what it's worth, the only actual field testing I've seen reporting
on this type of situtation is on the Xantrex website. The Krause system
in the Field Performance Summary Report has two arrays facing different
directions:

http://www.traceengineering.com/document_depot/technotes/960-0010-01-01.pdf

Eric Smiley - Project Leader
Photovoltaic Energy Applied Research
BCIT Technology Centre

phone: 604.432.8657    fax: 604.436.0286
esmiley at bcit.ca             www.tc.bcit.ca

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

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

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

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

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
Or send an email to: RE-wrenches-unsubscribe at topica.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================