PVUSA rating vs. CEC rating [RE-wrenches]

[Bill Brooks]

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Jay,

It has always been based on manufacturers data alone (just like inverter
efficiency), which provides an additional disincentive for the manufacturers
to tell the truth (as if they needed one--my cynicism showing through). As
long as the module meets the minimum spec, or nobody is looking, it gets the
rating. With the amount of money that is exchanging hands on these issues,
it is unlikely that "nobody is looking" for much longer.

As systems reach their 5-year end of warranty mark, we are going to see a
big interest from consumers to verify that their system is still within
warranty. The CEC warranty requires 90% of initial performance--if you have
no idea what initial performance is, how do you know what 90% is??? You
can't use the CEC rating, we have already shown that it is at least 5% too
high to start with.

Equations of the day:	System performance = X (an unknown)

				min. sys. performance = 0.9X = Y (another unknown)

Solve for Y without X -- impossible.

-----Original Message-----
From: Jay Peltz, Peltz Power [mailto:jay at asis.com]
Sent: Thursday, July 29, 2004 11:48 AM
To: RE-wrenches at topica.com
Subject: Re: PVUSA rating vs. CEC rating [RE-wrenches]

Hi Bill,

The CEC rating is done using manufactures numbers, there is no actual
testing correct?

jay
Peltz Power

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