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mounting panels on a misshaped roof? - Page 3

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Posted by wmbjkREMOVE on August 27, 2008, 2:06 pm
 
On Tue, 26 Aug 2008 22:03:44 -0700 (PDT), "elijahs@gmail.com"


I must have missed the 2 story part, 30' takes away some of the
advantages.


Definitely doable.


It's likely to be best to weld up custom hardware. Saves time shopping
and saves money over buying off-the-shelf hardware. Check out salvage
yards for the heavier bits. Here's an example of a scratch-built
pole-top tracker that uses an inexpensive linear actuator
http://www.citlink.net/~wmbjk/tracker.htm , and here's a link to a site
with many more examples plus affordable controllers
http://www.redrok.com/led3xassm.htm#led3xforsale .

Wayne

Posted by Duane C. Johnson on August 28, 2008, 12:42 am
 
wmbjkREMOVE@citlink.net wrote:


 > Saves time shopping and saves money over buying
 > off-the-shelf hardware. Check out salvage yards for
 > the heavier bits. Here's an example of a scratch-built

 > actuator
 > http://www.citlink.net/~wmbjk/tracker.htm , and here's
 > a link to a site with many more examples plus affordable
 > controllers

See this mount:
http://www.redrok.com/led3xassm.htm#lancette


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Posted by Roderick on August 27, 2008, 5:46 pm
 
I don't know if you have the space or the money, but is there any
place on the ground you could put a free standing structure?  We have
a lot in HOVE (Ocean View Estates, on the lava flow on the big
island), and I was thinking, the panels should go on a covered lanai,
not on the house itself.  That way, you get a little shade, can put a
table and some chairs under it, and the roof doesn't need to be 100%
waterproof.  I would not put the panels flat to try to capture optimum
sun at Lahaina Noon in the summer.  Not too much will be lost by
putting them at 20 degrees year round, and besides, if you have a
separate structure, you can point the panels due south.  And also, if
you don't slant the panels, bird droppings and dirt will collect on
them, then the rain will dissolve it, puddle up on the panels, and
leave behind a scummy coating the reduces your output.

I admit, though, shade is at a premium on the lava flow.  There are no
big trees, just some really small, stunted Ohia.  If you live near the
jungle, then you might have all the shade you want already - not worth
making a covered patio.

Posted by elijahs@gmail.com on August 29, 2008, 1:03 am
 

Hey - I'm just up the road from you, in Fern Acres, sorta between
Volcano and Keaau!

The real problem is that I'm in tall jungle - lotsa 600 year old
ohias.  They come right up to the cabin and the effect is wonderful -
full wall windows that look out into the ferns.  But the placement of
the panels means that they're shaded for a lot of the day.  The best
way to beat that is move them up to the peak of the A-frame - 30'+ in
the air...

If I had a wide open lot like yours, it would be a different story!


 elijah

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