[RE-wrenches] Shedding ice

[penobscotsolar at midmaine.com]

Impressive, Bob, but if one 125 watt panel took 1000 watts of power, what
is it going to take to melt my two 1600 watt arrays, pole mounted,
(theoretically, of course, and at a 65 degree tilt)....? Just wondering as
it seems a lot of power to use in the winter for an off grid or solar
reliant system.

Thanks,
Daryl



> 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:Mark at OasisMontana.com]
>> *Sent*: Monday, January 16, 2012 10:00 AM
>> *To*: 'RE-wrenches' <re-wrenches at lists.re-wrenches.org>
>> *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.
>>
>>
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Options & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out participant bios:
> www.members.re-wrenches.org
>
>