power tolerance point of fact [RE-wrenches]

[David Brearley]

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When I was in school in New Mexico, we took Daystar readings in the winter that exceeded 1100 W/m2.  We were probably at 5500 feet.  Marco's point is well taken, without a meter reading who's to say if 204 watts off a 190 watt module is higher or lower than expected?

Perhaps someone on the list can offer insight into the Sanyo's amorphous silicon layer performance out of the box?  I have always understood that amorphous silicon modules come out of the box outperforming their ratings.  After an accelerated period of Light Induced Degradation, the module output stabilizes, presumably at a power level warranted by the manufacturer.  

If the amorphous layer in the Sanyo behaves the same way, then it stands to reason that the modules will come out of the box "hot", performing above rated power.  

Any thoughts?

David C. Brearley 
Eastern Regional Branch Manager 
NABCEP Certified Solar PV Installer(tm) 

Energy Outfitters 
218 Little Falls Rd, Units 7 & 8 
Cedar Grove, NJ 07009 
Phone: 973/239-1815 
Fax: 973/239-8794 
www.energyoutfitters.com 


 



-----Original Message-----
From: Warren Lauzon [mailto:windsun at wind-sun.com]
Sent: Thursday, April 07, 2005 10:04 AM
To: RE-wrenches at topica.com
Subject: Re: power tolerance point of fact [RE-wrenches]


Did not measure it at that time, but normally peaks out at around 1040 to 
1060, depending on any haze etc.  This was not a scientific test, it was one 
of those "let's toss it up and see what it does" things. But it compares 
pretty close - but a tad higher - to other low-tolerance panels, such as the 
KC120.  Did not take any ground reflectance etc. into account. Our purpose 
was just to see how it compared with published ratings as compared to other 
panels.
-----------------------------------------


----- Original Message ----- 
From: "Marco Mangelsdorf" <marco at pvthawaii.com>

Warren,

At 7,000 feet, what did your pyranometer or Daystar kW/m2 say in terms of
insolation?

marco


Sanyo HIT 190 rated power 190 watts: Test in full sun with MX60 charge
controller = 204 watts.
Altitude 7000 feet air temp around 65 panel temp around 85-90.

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