PV power tolerance [RE-wrenches]

[Bill Brooks]

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Dan and Graham,

That document used my CEC document as the basis. It is good to see
manufacturers agreeing with the numbers, but remember that an INVERTER
manufacturer was admitting that PV MODULES have tolerance issues. The CEC PV
Installation Guide can be downloaded from:
http://www.energy.ca.gov/reports/2001-09-04_500-01-020.PDF.

Bill.


-----Original Message-----
From: Dan Whigham, SC Solar [mailto:DWhigham at scsolar.com]
Sent: Monday, October 11, 2004 9:52 AM
To: RE-wrenches at topica.com
Subject: Re: PV power tolerance [RE-wrenches]



Graham,

 I am impressed that Xantrex would publish an extremely honest evaluation of
PV performance. Thanks for the link Graham.

Best Regards,

Dan Whigham

SC Solar
Lighting The Way
www.scsolar.com
803-802-5522  Phone
803-233-1750 Fax


----- Original Message -----
From: "Graham Owen" <graham at solarexpert.com>
To: <RE-wrenches at topica.com>
Sent: Monday, October 11, 2004 12:03 PM
Subject: RE: PV power tolerance [RE-wrenches]




Marco,

Xantrex Technology has a well-written 2-page document on Calculating
Actual PV System Output.  The document addresses module production
tolerance, temperature, dirt & dust, wiring loss, module mismatch,
battery system losses (if applicable) and conversion loss for a total
de-rating factor of 0.67 (without battery).  The link to this 2-page
document in pdf format is:

http://www.xantrex.com/support/docserve.asp?id=227

Graham

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