Re: [pvusers] shadow

["Jeffery Green" <jeff_green@msn.com>]

 

Hi Sherry,

On a 12 or 24 volt system it would only affect those two panels. On a 48 volt system it would affect two other panels besides the two shadowed because 4 are wired in series if they are 12 volt panels.

Jeff Green

----- Original Message -----

From: Sherry Boschert

Sent: Friday, January 11, 2002 4:54 PM

To: pvusers@crest.org

Subject: [pvusers] shadow

 

A question from a non-techie:

I just noticed that our next-door neighbor here in San Francisco added a
tall, narrow metal smokestack to his fireplace chimney. (This must have
happened while we were out of town for the holidays.) At this time of year,
after 1 p.m. it casts a shadow approximately 5 feet long by 1 foot wide
onto our rooftop solar panels.

Would this be expected to interfere with our ability to generate solar
electricity? My limited understanding was that even a tiny bit of shadow on
a pv panel essentially disables the entire panel. If that's the case, I'm
worried that this simple shadow will be "turning off" two of our panels
throughout the afternoon.

I plan to check the readings on our equipment this weekend if I can to see
if I can notice a difference. Any thoughts?

thanks,
Sherry


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