"Real" Sun Hours [RE-wrenches]

[Travis Creswell, Ozark Solar]

I'm sorry Bill but I am just too dense to make any sense of kWh/2m/day.  I
spent a few minutes on the red book site and remembered that I had been
there before.  Is there I number that I can take x's the amps of my array to
get the daily amp hours?  How do I get there from the red book number?

I am collecting data for my site.  To me it's pretty simple.. divide the
amphours by the peak amps of my array and then I know how many sun hours I
got.  It's not a 30 yr average but its pretty simple and factors in
everything.

Travis
----------
>From: Bill Brooks <billbrooks7 at earthlink.net>
>To: RE-wrenches at topica.com
>Subject: RE: "Real" Sun Hours [RE-wrenches]
>Date: Tue, Sep 25, 2001, 5:42 PM
>

>Carl and Travis,
>
>Most insolation data provided by folks like NREL and others is in units
>referred to as "peak sun hours". This is kWh/m2/day. Values are often
>published for monthly or yearly averages as in the NREL "Red Book". Goto
>http://rredc.nrel.gov/solar/pubs/redbook/ and look at this. You can also
>order a copy online.
>
>Measurements are made with pyranometers and the insolation recorded is
>listed in units of peak sun hours. This is an average daily energy delivered
>by the sun (averaged over 30 years in the case of the "Red Book"), not an
>instantaneous irradiance measurement.
>
>I hope this helps.
>
>Bill.
>

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