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Posted by Curbie on February 25, 2011, 10:33 pm
wrote:
>Bruce
Bruce,
Good point!
I was going to build active solar-thermal panel for heat only, but
combining the two has some interesting advantages.
Thanks,
Curbie
Posted by Jim Wilkins on February 24, 2011, 10:40 pm
> I was searching the web for some specific information on solar thermal > panels and ran into a site about DIY building Photovoltaic panels. A > few years ago a bought a book: > "BUILD YOUR OWN SOLAR PANEL" > by Phillip J. Hurley > http://www.goodideacreative.com/solarpanel.html > ....... > Curbie
The Harbor Freight 45W panel and charge controller kit is on sale with
a coupon for $59 until April 17. I measured 2.5A from it in mid-
February sun.
jsw
Posted by Curbie on February 25, 2011, 12:04 am
Hi Jim,
I found a 5 star rated seller on Ebay selling 1000 watt packs of 3x6
PV cells for ~$00.00 and in studying this method I was looking at
about 4000 watts.
Curbie
>The Harbor Freight 45W panel and charge controller kit is on sale with >a coupon for $59 until April 17. I measured 2.5A from it in mid- >February sun. >jsw
Posted by Martin Riddle on February 24, 2011, 11:45 pm
> I was searching the web for some specific information on solar thermal > panels and ran into a site about DIY building Photovoltaic panels. A > few years ago a bought a book: > "BUILD YOUR OWN SOLAR PANEL" > by Phillip J. Hurley > http://www.goodideacreative.com/solarpanel.html > .... which seemed like a real effort to construct DIY Photovoltaic > panels, but I was twitchy on whether the panels could be sealed well > enough against atmosphere infiltration (oxygen & moisture) for near > commercial longevity. > On the DIY Photovoltaic site I found links to these You-Tube videos > outlining another method of DIY Photovoltaic construction: >
> This method basically uses a frame made from aluminum angle stock with > a sheet of ¼" low iron tempered glass laid in and the tabbed array of > PV cells just set on the bottom side of the glass, then the whole > array is bonded and encapsulated with the glass with Dow product > Sylgard 184. > The tentative costs for this encapsulated method look pretty good and > this and it makes sense for oxygen & moisture infiltration as this > Sylgard 184 is specifially made for this porpose. > Has any here anything about this method, good or bad??? > Thank, > Curbie
Sylguard doesn't always bond well, the parts need to be free of any
contaminates (eg: oil). It will not cure in the spot where there is
contamination. It is also soft when fully cured, like a jelly.
Aggressive mixing will also introduce bubbles.
Thermal properties arent all that great, But I do see that it is UV
resistant.
If you have a large vacuum oven to process it in, then it might work ok.
Cheers
Posted by Curbie on February 25, 2011, 12:13 am
On Thu, 24 Feb 2011 18:45:53 -0500, "Martin Riddle"
>If you have a large vacuum oven to process it in, then it might work ok.
Funny, when I was looking at those You-Tube videos, the author was
saying that he preferred cooler temperatures and long curing times,
and I was thinking what his process needed was a vacuum cover over the
frame to draw the bubbles out of the Syldard.
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Bruce,