PV orientation [RE-wrenches]

[Joel Davidson]

If you input the right numbers, F-Chart, PVGRID, PVWATTS, DesignPro, etc.
will give you good results plus/minus 10%. In 1994, we did two exact 4 kW
Omnion inverter and Solec module PV systems on one SMUD PV Pioneer home.
One array faces south. The other array faces west. The west-facing system
produces 80% of the annual energy produced by the south-facing system.
SMUD can probably give you kWh readings for this house and 100 other 4 and
6 kW Omnion inverter PV Pioneer systems that we did in 1995.



Joel Davidson

"Joe Schwartz, Home Power" wrote:

> Hey all,
>
> I'm looking for real world data on PV orientation vs. KWH production.
>  From what I've seen, much of the current orientation advice
> (especially on-grid) is based on F-Chart simulations.
>
> Have any of you collected KWH output data for systems with arrays in
> multiple orientations at a particular site? And if you have, how
> closely does the data correspond to simulation programs, i.e. F-Chart?
>
> To keep it simple, I'd to limit the scope of this question to systems
> with an array/inverter in any given orientation (not arrays with
> different orientations feeding a single inverter). I'd also like to
> ignore orientation considerations that may be based on economics,
> like TOU metering. I'm just after KWH output data vs. orientation.
>
> Thanks,
>
> Joe
> --
>
> Joe Schwartz - CEO and Technical Editor
> Home Power magazine
> joe.schwartz at homepower.com
> www.homepower.com
>
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