Average sun-hours [RE-wrenches]

[Tom Duffy]

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I design for the winter (in the northern hemisphere) to start but usually
wind-up with down-sizing the pv to a gen run time the customer can be
comfortable with. So it never is really oversized for the rest of the year

Tom 


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The Solar Biz
Tom Duffy
tom at thesolar.biz
HC 61 Box 184
Glenwood, New Mexico 88039
tel: 505-539-2111
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-----Original Message-----
From: Kurt Nelson [mailto:sunwise at cheqnet.net] 
Sent: Thursday, August 05, 2004 5:06 AM
To: RE-wrenches at topica.com
Subject: Average sun-hours [RE-wrenches]

 

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Greetings all,

Can I request a thought or two on using annual average sun-hours versus
winter sun-hours for designing off-grid PV systems?

While it would be really nice to not design a system around any generator
run-time, is that practical when one looks at the fact that the resulting
system is so oversized for the most of the solar year?
BTW, I am not saying there would be no generator or generator run-time in
either case, but am interested in it from a system design perspective.

Thanks in advance.

Kurt Nelson
SOLutions

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