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Calculating how much electricity I can produce

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Posted by Lionel on August 3, 2010, 9:19 am

I'm in Brisbane Australia. Currently we some decent government grants
such that a 1.5kw solar system costs around $000AUD.

I've just been observing my roof recently. It is facing west north west
(be aware, souther hemisphere so north is ideal), gets sun from about
10:30/11:00 - 4:00/4:30, this is during our winter.

However, I've noted that parts of the roof are shaded a bit from some
large gum trees up until about 1pm.

I'm wondering if there is anyway (or the best way) of determining how
much electricity I will actually be able to produce to figure out how
financially viable it is for me.



Posted by Ron Rosenfeld on August 3, 2010, 11:37 am

You could use a Solar Pathfinder

Posted by ghio on August 3, 2010, 1:32 pm
Take a piece of chalk and draw the outline of the shadow every hour.
At the end of the day you will know what is in shadow during the
course of the day.

As for working out the energy produced visit the NASA meteorology site
for solar <http://eosweb.larc.nasa.gov/cgi-bin/sse/grid.cgi>  You will
have to register.

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