Posted by j on February 14, 2012, 1:00 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
@ $175 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, 1:45 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
> @ $175 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
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, 6:09 am
> 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
>@ $175 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
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, 9:03 am
On 2/15/2012 6:09 AM, Jim wrote:
>> 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
>>
>> @ $175 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
> You can buy brand new Evergreen 225 watt panels for a dollar a watt on
> Ebay. I just bought some.
That tempts me. I could not find them though. Link?
I did see some 220 W, in quantity, going for about $1.75. And a huge
number of untabbed cells for well under $1 (~$.60).
Jeff
Posted by Jim on February 17, 2012, 9:55 pm
>On 2/15/2012 6:09 AM, Jim wrote:
>>
>>> 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
>>>
>>> @ $175 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
>>
>>
>> You can buy brand new Evergreen 225 watt panels for a dollar a watt on
>> Ebay. I just bought some.
>>
>>
>>
>That tempts me. I could not find them though. Link?
>I did see some 220 W, in quantity, going for about $1.75. And a huge
>number of untabbed cells for well under $1 (~$.60).
> Jeff
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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> I noticed that there are a number of used PV panels, this is one:
>