You will need a MPPT controller to match up the array voltage to your
battery voltage. Outback makes very nice ones. FM60 and FM80.
Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://arduinotronics.blogspot.com/
On 08/31/2010 07:46 PM, Michael Brotherton wrote:
>
>
> I recently came in contact with someone who was given 280 BP solar
> panels after
> a gas station dismantled them. They say Pmax 42W, Max System Voltage
> 250v, UL
> Max sys 117V.... He gave me one with a crack in the glass to test out... I
> hooked up a volt meter today (very late in the day so not that much sun)
> and it
> read 80 volts. The cells are enclosed in 2 sheets of glass. I only have
> experience with my 12V panel on my boat and haven't seen a high voltage
> panel
> until now. I guess these were meant for direct grid tie in.
>
> He's selling the panels for $40 each, but if I buy a bunch of them he'll
> let
> them go for $30 each. Just wondering what the groups input was as to
> whether I
> should make the purchase and possible ideas as to what I should do with
> them.
> They are pretty large and from what i've read online have a tendency to
> gather
> moisture in between the glass sheets. I could try to remove the sheet of
> cells
> from the glass and put them in something else.
>
> Any comments or ideas welcome
>
> Thanks,
>
> Mike
>
>
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