Altitude effects on PV performance [RE-wrenches]

[matthew tritt]

Wow. This is really interesting info Tom. I've been asked many time by
mountain customers about altitude's influence on PV output, but never heard
any real info on the subject.

Thanks.

Matt T----- Original Message -----
From: "Tom Simko" <tom at skylinesolar.com>
To: <RE-wrenches at topica.com>
Sent: Thursday, February 27, 2003 5:30 PM
Subject: Re: Altitude effects on PV performance [RE-wrenches]


> 1 to 2 percent, depending on the lapse rate, lapse rate being defined as
> the ratio of barometric pressure with altitude change, sometimes more,
> sometimes less. Temperture plays a part also, hotter air equeals thinner
> air. Density altitude charts are available at any small airport's FBO
> showing the "apparent" alitude changes with temperture. To be on the
> conservative side I'd figure 1% gain in performance with every 1,000 gain
> over sea level.
>
> Tom Simko
> Skyline Solar
>
> on 2/27/03 5:48 PM, Jeff Oldham at starpower4u at juno.com wrote:
>
> > Anyone know a basic formula or web site that addresses altitude effects
on
> > output? I can't seem to find anything, I have a project at 12k' in Tibet
and
> > need some ball park numbers for now (we'll take on site readings later).
I've
> > had Everest climbing teams I've outfitted claim very noticable increase
at
> > 15k, but these guys are deprived of oxygen and can't think straight!
> >
> > thanks
> >
> >
> > Jeff Oldham
> >
> >
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