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Used PV Solar

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Posted by j on February 14, 2012, 6:00 pm
 
   I'm not familiar with the PV market, but had a look at EBay as a lark.

   I noticed that there are a number of used PV panels, this is one:

http://www.ebay.com/itm/170-Watt-BP-SOLAR-PANEL-170W-Solar-Panel-SX170B-Polycrystalline-Silicon-black-/130623213615?pt=LH_DefaultDomain_0&hash=item1e69c0102f#ht_1134wt_952

@ $75 that is near the magic dollar/watt.

So, why the used panels? Are these the same panels BP uses on the gas
pump roofs?

   Jeff

Posted by Jim Wilkins on February 14, 2012, 6:45 pm
 


http://www.ebay.com/itm/170-Watt-BP-SOLAR-PANEL-170W-Solar-Panel-SX170B-Polycrystalline-Silicon-black-/130623213615?pt=LH_DefaultDomain_0&hash=item1e69c0102f#ht_1134wt_952

The output of the "45W" panels HF sells decreases with age. Mine measured
~2.8A when new, now they might do 2.0A.

They have constant current outputs which could generate 45W only into a 17V
battery. The current is the same into a 12V battery, but power is less.

jsw



Posted by Jim on February 15, 2012, 11:09 am
 

You can buy brand new Evergreen 225 watt panels for a dollar a watt on
Ebay.  I just bought some.




Posted by j on February 15, 2012, 2:03 pm
 On 2/15/2012 6:09 AM, Jim wrote:

http://www.ebay.com/itm/170-Watt-BP-SOLAR-PANEL-170W-Solar-Panel-SX170B-Polycrystalline-Silicon-black-/130623213615?pt=LH_DefaultDomain_0&hash=item1e69c0102f#ht_1134wt_952

That tempts me. I could not find them though. Link?

I did see some 220 W, in quantity, going for about $.75. And a huge
number of untabbed cells for well under $ (~$.60).

   Jeff

Posted by Jim on February 18, 2012, 2:55 am
 

http://www.ebay.com/itm/170-Watt-BP-SOLAR-PANEL-170W-Solar-Panel-SX170B-Polycrystalline-Silicon-black-/130623213615?pt=LH_DefaultDomain_0&hash=item1e69c0102f#ht_1134wt_952

http://www.ebay.com/itm/5-210w-evergreen-solar-panel-ES-E-fc3-120-solar-cells-/260956535430?pt=LH_DefaultDomain_0&hash=item3cc238ba86




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