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Solar PV panels = money from your electricity supplier

 
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Aurora



Joined: 24 Jan 2007
Posts: 8502

PostPosted: Tue Aug 21, 2007 7:05 am    Post subject: Solar PV panels = money from your electricity supplier Reply with quote

http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2007/08/20/nosplit/eavolt120.xml

Quote:
The Telegraph - 20/08/07



Paul Norris has the kind of power bill we all dream of - his electricity supplier sends him a cheque.

He generates so much electricity from the solar photovoltaic (PV) panels on the roof of his three-bedroom house in Tunbridge Wells, Kent, that he not only satisfies his own needs but also exports excess supplies to the National Grid.

The main reason I had it installed was because I was worried about climate change, but it's great to actually make some money out of it," he says.

"Most people imagine it only really works during a sunny summer's day, but it even produces a decent amount of power on a cloudy day in the middle of winter."

(continued)
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RenewableCandy



Joined: 12 Sep 2007
Posts: 12605
Location: York

PostPosted: Fri Sep 21, 2007 8:22 pm    Post subject: Reply with quote

Quote:
but it even produces a decent amount of power on a cloudy day in the middle of winter


Heck what kind of panels is he using? Superconductors??
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lancasterlad



Joined: 22 Jun 2007
Posts: 358
Location: North Lancashire

PostPosted: Sat Sep 22, 2007 6:40 am    Post subject: Reply with quote

Old news, you can see his setup here
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adam2
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Joined: 02 Jul 2007
Posts: 6814
Location: North Somerset

PostPosted: Sat Sep 22, 2007 2:15 pm    Post subject: Reply with quote

RenewableCandy wrote:
Quote:
but it even produces a decent amount of power on a cloudy day in the middle of winter


Heck what kind of panels is he using? Superconductors??


All PV modules will produce power in cloudy or dull conditions, however the output will be very much less than in bright sun.

I have a stand alone battery charging PV system, not connected to the grid. typical output figures are

bright direct sun, at the optimum angle=1,200 watts
bright direct sun, but not at the optimum angle=800 watts
bright but cloudy= a few hundred watts
dull winter day with heavy cloud=about 100 watts.
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RenewableCandy



Joined: 12 Sep 2007
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Location: York

PostPosted: Fri Sep 28, 2007 12:10 pm    Post subject: Reply with quote

Oh that kind of output, sorry I thought he meant aboout 2/3 or something.

Your 'bright but cloudy' number looks good: are they amorphous panels?
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adam2
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Joined: 02 Jul 2007
Posts: 6814
Location: North Somerset

PostPosted: Fri Sep 28, 2007 2:35 pm    Post subject: Reply with quote

RenewableCandy wrote:
Oh that kind of output, sorry I thought he meant about 2/3 or something.

Your 'bright but cloudy' number looks good: are they amorphous panels?


I have a large selection of PV modules, but none are amorphous, most are polycrystaline, mainly by Solarex.
Most of the modules are wired in series groups of three, and then connected to a maximum power point tracker.
A few are connected direct to the batteries with only a blocking diode and switch.
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