On 1/16/2012 11:39 AM, David Katz wrote:
Mark,
I believe the Midnite Classic has this feature built in. Check with them.
David Katz
It just snowed up here in Arlington, Washington A.C. and we were just
starting to melt some snow
on a couple of modules on our roof just now with one of our charge
controllers here in the lab.
This feature is not yet in the Classic, BUT, check out this experiment
that I did about 3 years ago
in my front yard with an animated gif time lapse.
One module is being powered and the other is not powered, just sitting
there for comparison.
These are KC125s.
The time involved here was about 3 hours and took about 1 kW-hour of
energy but gives you
an idea of what may be done with this idea. One thing not in our favor
here is that the module
that is being powered is resting on the ground, in the snow, which would
significantly
hinder snow melting I would think rather than being properly mounted.
Oh what fun it is to melt some PV snow tonight !
http://fusion.midnitesolar.com/PVsnowMelt3.gif
boB
*From*: Mark Dickson [mailto:[email protected]]
*Sent*: Monday, January 16, 2012 10:00 AM
*To*: 'RE-wrenches' <[email protected]>
*Subject*: [RE-wrenches] Shedding ice
I recall a conversation a while back about the possibility of
"reversing" the current in a solar module to increase the cell temp
enough to shed ice/rime. To follow-up, has anybody been successful at
this? I am guessing, if so, it would entail, removal of diodes,
increasing PV and battery capacity and some way to sense the ice at
the very least. . . It sounds good in theory, but I am skeptical as to
whether it will work in reality. . .
Best regards,
Mark Dickson,
NABCEP Certified Solar PV Installer ^(TM)
Oasis Montana Inc.
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