Tracker efficiencies, etc. [RE-wrenches]

jay peltz jay at asis.com
Wed Mar 27 17:16:44 PST 2002


Hi Carl,

There is going to be on line very soon a panel test between Siemens 130's and
Unisolar 64's using SMA 2500 watt inverters.  This info will be on a website
availble to all.  This should give us really good info on how the different
panels work in different weather and at different times of the day.


I'll let you all know when its on line.

jay

peltz power

Carl Emerson wrote:

> Hi Chris,
>
> Back in '97 I had a fixed democracy rack going with SP75 US64 MSX77 BP275.
>
> I was most interested in Daily Amp Hours delivered and logged this over a
> six month period. I have privately distributed the results.
>
> I am kicking myself for not logging the outputs at different times of the
> day but I do remember that as the sun came to the North at 12.30 pm in NZ
> the glass panels that were previously lagging behind the amorphous caught up
> and produced a larger proportion of their daily yield when approaching face
> on to the sun.
>
> This is firm in my mind that Mono Poly and Amorphous has different responses
> to incident angles of direct sunlight.
>
> This can easily be verified if someone has the time to do it.
>
> I have often said that for this reason the rating of panels face on to a
> controlled light source is a non-sense.
>
> It is how much power is delivered when the sun is at acute angles to the
> panel that matters....  Unless you have a twin axis tracker !!
>
> Cheers
>
> Carl Emerson.
>
> Chris Worcester wrote:
>
> > Hi Carl,
> >
> > I (& others) would be very interested in the modules you're referring to
> > (Siemens, BP, etc. or Crystalline, Amorphous) in this racking scenario.
> > Thanks
> >
> > Carl Emerson wrote:
> >
> > I have found significant variation in performance loss between the main
> > panel technologies when the angle is not optimized...
> >
> > Chris Worcester
>
> - - - -
> 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
>

- - - -
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
==^================================================================





More information about the RE-wrenches mailing list