[RE-wrenches] Phone/ sun position apps
Ray
ray at solarray.com
Mon Sep 3 15:29:42 EDT 2018
HI Ken;
Don't tell me, but you probably still have a copy of /The Passive Solar
Energy Book/ on your shelves, with those nice old solar siting charts?
Those of us lucky enough to have been in the business for decades have
been confronted with Ken's little considered fact: *Trees grow*. I went
back to a site I had done in '99, and was amazed I was so stupid to put
the array in the shade of a 30 ft tree. That must have been before I
got my Solar Pathfinder, I thought......Then I started looking at the
tree and my old pics of the site, and realized that tree was only about
5 ft tall, when I did the system. As Homer Simpson says: " /Douhh!/ "
On the flip side, beetle kill in the Southwest has had the opposite
effect; arrays that were on tall poles to get above the tree shading are
now rather ridiculous looking sitting out by themselves in the now large
clearing.
While I certainly didn't go into solar to cut down trees, sometimes it
needs to happen along with clearing trees close to the house for fire
danger. I do my best to get folks to move the array to save the big
beauties. (yea, I'm a tree hugger at heart) Higher voltage arrays
courtesy of MPPT controllers help in that regard, too.
Ray Walters
Remote Solar
303 505-8760
On 9/3/18 12:26 PM, Ken Schaal wrote:
> I started siting SHW systems in 1976.
> Studied sun angle chart persistently, until i had a good sense of how
> the sun moves for our area in central Virginia.
> We also have lots of trees...fast growing, tall trees !
> So while precision shading analysis is a valuable tool, the info is
> static.
> Our sites are rarely static !
> The biggest issue here is getting clients to manage their trees.
> I learned this even before I started installing SHW, when I first
> built a sunroom on the south side of my house in 1974.
> Many trees have grown, and then become firewood, since then.
> When the pv system was installed, in 2008, several more trees on the
> east and west were removed.Fortunately there were now taller trees to
> the NE and NW to shade house in summer. Exterior movable shading,
> sunscreen, on south windows, combined with interior insulating
> shades, allowing the collectors and pv panels to be in full sun, while
> the house is protected from unwanted spring, summer, fall solar gain.
> Being a full service solar contractor requires a long term perspective
> in our climate. And most importantly, clients willing and able to
> manage their trees !
> It has been my observation that folks that love solar, hate to cut
> trees, even tho trees, in our climate, grow faster now due to climate
> change.
>
> Ken Schaal
> CommonWealthSolar.com
>
>
>
>
>
> On Mon, Sep 3, 2018, 12:45 PM Dan Fink <danbob88 at gmail.com
> <mailto:danbob88 at gmail.com>> wrote:
>
> I use Solar Shading from Comoving Magnetics on Android. I had my
> class test it versus the Solar Pathfinder and Solmetric Suneye,
> and our shading readings were within 6-8%.
>
> The Solmetric Sunviewer app is also handy. I have never tried
> their iPV app because of the price, and because Solar Shades is
> working fine for me.
>
> Dan Fink
> Professor of Solar Energy Technology, Ecotech Institute
> IREC Certified Instructor™ for:
> ~ PV Installation Professional
> ~ Small Wind Installer
> Executive Director, Buckville Energy
> NABCEP Registered Continuing Education Providers™
> NABCEP PV Associate
>
> 970.672.4342
>
>
>
> On Mon, Sep 3, 2018 at 10:28 AM Jerry Shafer
> <jerrysgarage01 at gmail.com <mailto:jerrysgarage01 at gmail.com>> wrote:
>
> I still use the sun eye and solmetric, noting works as well as
> being on site, solmetric had an app way back when that was on
> a subcription bases
> Jerry
>
> On Mon, Sep 3, 2018, 9:22 AM Jay <jay.peltz at gmail.com
> <mailto:jay.peltz at gmail.com>> wrote:
>
> Hi all,
>
> I’m wondering about which apps people are using for
> determining shading and sun position.
>
> Thx
> Jay
>
> Peltz Power.
>
>
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> On Sep 3, 2018 9:22 AM, "Jay" <jay.peltz at gmail.com
> <mailto:jay.peltz at gmail.com>> wrote:
>
> Hi all,
>
> I’m wondering about which apps people are using for
> determining shading and sun position.
>
> Thx
> Jay
>
> Peltz Power.
>
>
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