[RE-wrenches] orientation data

[Darryl Thayer]

It used to be that Maui Solar could do it, my Maui is way out of date,  what is needed is a simulation solar calculator and a TOU data set to drive with it
Darryl

--- On Tue, 10/6/09, Mendocino Solar Service <msolar at mcn.org> wrote:

From: Mendocino Solar Service <msolar at mcn.org>
Subject: Re: [RE-wrenches] orientation data
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Date: Tuesday, October 6, 2009, 4:58 PM

I think what's needed is a way to analyze the financial output related to orientation, not just kwh. Unlike with off-grid systems, grid-tied is all about financial results. For a customer on TOU and net metering, the time value of the kwh produced is quite important. A west facing array will have peak performance in the afternoon when the system can sell at the peak rate; even though it may produce fewer kwh overall, the value of them is much higher. The CSI's EPBB calculator, flawed as it may be, seems to take this into account when calculating the design factor on which the rebate is based. Anyone using a program that can take time and pricing into account too?

Bruce EricksonMendocino Solar Service707-937-1701707-937-1741 faxPO Box 1252Mendocino, CA 95460 

"Serving the Solar System"






On Oct 6, 2009, at 10:53 AM, Ryan Mayfield wrote:
Nik,  Check out this tool on Solmetric’s website: http://www.solmetric.com/annualinsolation-us.html  You can input your tilt and azimuth and it calculates the percentage loss from the site’s ideal orientation.
Ryan      From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Nicholas Ponzio, Building Energy
Sent: Tuesday, October 06, 2009 10:38 AM
To: RE-wrenches
Subject: [RE-wrenches] orientation data  Hey Folks,
Anybody have real data to compare productions for south-facing vs, west-facing PV array? PVWatts is only showing about a 7% derating for facing west.   Thanks,Nik  No virus found in this incoming message.
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