Posted by Mark Norton on June 16, 2005, 4:12 pm
I have a question for this group. I have been lurking here for over a year
now, and have seen a lot of people talk about having to replace broken
panels, but I have not seen anyone talking about WANTING broken panels. I
have a friend that gets 8-10 broken panels every few months, and I was
wondering if they could be used. Here is the ultimate idea . . . a 100 watt
panel that has shattered glass, but still produces the proper voltage could
be used still to produce 50 watts of power. No? Am I wrong here? Is there
something that I am missing?
It would seem to me that I could put together a large sized (Both the space
and the wattage) 12V system using these broken panels. Who cares if they
only produce half their rated wattage? Isn't 50 Watts of FREE power better
than 100 Watts of power that I paid $00 for?
What am I missing?
Posted by BobG on June 16, 2005, 4:46 pm
Each 4 inch cell produces .6 volts. A 12 volt panels has 24 cells in
series. Like a string of xmas lites in series. Might be able to jump
out the one broken cell and get 11.4 volts
Posted by Sylvan Butler on June 17, 2005, 6:11 am
Usually 33 or better, 36 cells. Reason is the voltage per cell drops as
the temperature increases. Leave them out in the sun, they get hot, a
33 cell panel might only be putting out 13 volts. 13 volts isn't enough
to charge a 12v battery.
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Posted by m II on June 17, 2005, 11:59 pm
Sylvan Butler wrote:
All the professionals *know* that you must keep the panels completely OUT of the
sun. I know I do. With all the care I lavish on them I must say I'm quite
disappointed in the output, which hovers around zero, regardless of temperature.
Posted by Zunar 5J/90 Doric 47 on June 20, 2005, 4:09 am
Har de har har. Try putting the PV's inside your fridge... sure it means you'll
have to clear out
some of that beer to fit it in there but the panels will stay cooler and despite
what "they" say,
the light inside the fridge might not actually go out when the door is shut. ;-)