[RE-wrenches] Power line shading

[Dana Brandt]

I have a system with Enphase inverters that has a 1/2" cable crossing 8-10ft
above the array. I used the Enphase inverters specifically for isolating
that shading, but have seen no noticeable impact on production from the
modules being shaded.

Dana

Dana Brandt
Ecotech Energy Systems, LLC
www.ecotechenergy.com
dana at ecotechenergy.com
360.510.0433


On Mon, Oct 11, 2010 at 8:17 PM, Nick Soleil <nicksoleilsolar at yahoo.com>wrote:

> I have some anecdotal experience that may be valuable.  I just recently
> installed a system under a set of 3 power and 3 phone wires located about
> 20' above the array.  The system was installed with Enphase micro-inverters,
> so I could clearly see the effect of the wires on the shaded modules.  I
> just checked todays production, and the modules with wire shadows on them
> were producing 18-21% less per module than the modules without the shadows.
>      At another site with just one 1/2" phone wire located 3' above a
> module, that module is producing  2-3% less when shaded.
>
> Nick Soleil
> Project Manager
> Advanced Alternative Energy Solutions, LLC
> PO Box 657
> Petaluma, CA 94953
> Cell: 707-321-2937
> Office: 707-789-9537
> Fax: 707-769-9037
>
>
> ------------------------------
> *From:* Eric Thomas <solarepiphany at gmail.com>
>
> *To:* RE-wrenches at lists.re-wrenches.org
> *Sent:* Mon, October 11, 2010 12:28:33 PM
>
> *Subject:* [RE-wrenches] Power line shading
>
> Hey there,
>
> We have a string inverter system installation coming up that has a power
> line suspended over the roof. The line is diagonal to the roof and about 20'
> above the surface. It will be very challenging to configure the strings to
> mitigate shading. Does anyone have experience with the effects on producion
> from the thin shadow cast by the powerline?
>
> Thanks
>
> Eric Thomas
> Solar Epiphany LLC
> Seattle
> (206)919-3014
>
>
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