Unisolar Roofing [RE-wrenches]

[Bill Brooks]

Thanks for the good info Doug. All of this kind of information is helpful,
but long-term testing along with this short-term testing is what is really
needed. The only people that can afford to do that are the big boys like DOE
and CEC, but they haven't showed the fortitude to stick with the program.
Just when things started to get interesting (10 years of field data) at
PVUSA, they decided to pull the plug. A year later even an idiot can see
that it was a mistake.

Bill.


> -----Original Message-----
> From: Doug Pratt [mailto:dpratt at pacific.net]
> Sent: Thursday, March 15, 2001 8:03 PM
> To: RE-wrenches at topica.com
> Subject: Re: Unisolar Roofing [RE-wrenches]
>
>
> "Todd Cory, Bald Mtn. Solar" wrote:
>
> > I believe Real Goods did a real time comparison with the US64's and they
> > did real well.
> >
> > Doug, you got the data on that?
>
> As a matter of fact I do Todd.  But as Carl Emerson noted in his
> post, I was
> more or less asked to clam up about it.  The gist of the story is that the
> US64's, even after 6 months of light soaking on Sandia's racks, delivered
> equivalent to 85-watt modules, and kicked butt on the Astropower
> AP75's, and
> the Siemens SP75's they were being tested against. There were
> four examples
> of each module, randomly choosen from Real Goods stock to eliminate any
> lucky draws or "hot samples". Unfortunately, Real Goods was
> selling lots and
> lots of Astropower and Siemens modules at that time, and not so much
> Uni-Solar. So it really wasn't to our advantage to publicize the test, and
> there were some fairly powerful industry representatives who were
> fairly hot
> about it.
>   The data from Sandia indicated that the US64's came out of the boxes
> delivering almost 100 watts. Can you say attenuation?! In 6 months they'd
> come down to about 85 watts. I think Uni-Solar is betting they'll
> still make
> 52 watts at 20 years, but nobody knows for sure till then.
>
> Doug Pratt
> Real Goods Technical Editor
>
>
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 michael.welch at homepower.com

____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
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