[hackerspaces] solar

[Georges Toth]

On Monday 26 April 2010 12:15:55 Koen Martens wrote:
> On Mon, Apr 26, 2010 at 12:01:35PM +0200, Georges Toth wrote:
> > I just tested the solar panel and have great news :-)
> > The measured values are exactly as on the specs !!
> > 
> > I measured 21V +/- ~0.4 ... and with full sunlight 4.8A +/- ~0.3
> > and that over 10s being nearly constant
> > 
> > So that's pretty damn great... 21V * 4.8A = 100.8W
> > 
> > :-)
> > 
> > Now we just need to get more of those and mount them on our roof, in
> > order to power our always on equipment completely with green power :-D
> 
> You probably didn't mean to send it to this list, but still i'm interested.

Hehe yeah you're right ;-)


> What panels are these?? And how do they perform in less optimal lighting
> conditions?

It's a kyocera panel from 1998, with 36 cells.
It was in service for most of that time until recently, which is why I was 
surprised to see it still performing like on the specs.

I only quickly tested it for the first time now, so I don't have too knowledge 
about this one.

When the sun was covered with a cloud, the current dropped quickly to 3A and 
less.
I will try to hack a small circuit for measuring light, voltage and current, 
over a day...


-- 
regards,

Georges Toth


--
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