[RE-wrenches] Vertical PVs for Comm site

[Ray]

Has any one tried insulating the back side of the solar module? I know 
normally that would be a really bad idea, but if the system was over 
designed in the summer, and flat on the wall, you could get away with 
it.  That dark surface under the glass with 2" of foam board backing 
would probably get warm enough to shed at least some of the build up, 
when the sun came out.  I've seen solar thermal systems go to almost 300 
degrees F with air temps below freezing.

Ray Walters
Remote Solar
303 505-8760

On 12/1/18 4:27 PM, Michael Morningstar wrote:
> Bill,
> I’ve installed dozens of mountain top systems starting just North of 
> you, and spreading from the coast to the Nevada border and up into 
> Central Oregon. Fire lookouts, Repeaters, Cell towers, ect…. Cascade 
> and Coastal Cement. I count on arrays at 60 degrees getting entombed 
> in snow and ice for weeks. I’ve seen the walls of most buildings 
> encased in ice too! Lookouts get shut down for six months, and maybe 
> minimal loads stay on, like weather equipment. When full time power is 
> required, then propane or diesel generators and room heaters are 
> installed, often tandem generators that alternate usage and act as 
> backups. Many of my previous customers required a rapid response if 
> there was a power failure and that meant serious adventure. I’m kind 
> of over it now, many of those clients technicians also take care of 
> the power end of things.
> Michael
>
>> On Dec 1, 2018, at 2:18 PM, Sam Haraldson <sam at onsiteenergyinc.com 
>> <mailto:sam at onsiteenergyinc.com>> wrote:
>>
>>     However, even if vertical, will Sierra snow (its a special breed)
>>     still
>>     wind-pack on, stay for weeks, days, not at all? This site is on the
>>     Pacific crest at 7,000 ft.
>>
>>
>> Yes, the "Sierra cement" is not the same as the "cold smoke" snow we 
>> get in my part of the country but I see that snow tends to pretty 
>> easily slough off arrays that are at and above the 35 deg angle.  
>> Even the wettest Sierra stuff sure doesn't seem like it could stick 
>> to glass at a 90 degree angle.  I suspect you could get away with 60 
>> deg, have better production, and still shed the snow.
>>
>> -- 
>> Sam Haraldson, Installation Manager
>> onsiteenergyinc.com <http://onsiteenergyinc.com/>
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