Solar Pathfinder Assistant [RE-wrenches]

Mark Frye markf at berkeleysolar.com
Tue Feb 20 08:17:53 PST 2007


I recently started using SPA.

I just noticed that with a zero shading trace, the Unshaded % of Actual Site
by month changes with azimuth and tilt.

As azimuth moves from 180, less than 100% is reported for all months.

But as tilt moves towards 0, the summer months begin to be reported as
greater than 100%.

I am talking with SPA now, but does anyone have an idea of why azimuth and
tilt need to be applied to determine % % unshaded?

MPF


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