[RE-wrenches] Vertical PVs for Comm site

[Michael Morningstar]

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> 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
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