Sunny Boy in the sun? [RE-wrenches]

[Mo Rousso]

Probably best to let SMA respond to this, but here is my take/experience and
some obvious thoughts.

While air circulation is good, ambient temp also needs to be factored.  If
you are in a cold location, a southerly exposure may not be a bad thing.

How loaded is the inverter?  An SWR2500U with two strings of 9 160-170W
panels needs cooling more than the same inverter with 9 140W panels.

Sometimes the addition of a cooling fan to the heat sink helps quite a bit.
There are some options, from the SMA Sunny Breeze to the Radio Shack home
built.  One of my favorites is to use a DC fan and a 5-10W PV panel to not
only power the fan, but to shade the inverter as well.

Once, I saw a Sunny Boy display in full sun go completely black.  I think
some LCDs don¹t like direct sun, but I¹m not sure.

So, I don¹t think that this is a black and white subject like PV array
orientation and shading might be.
-- 
Mo Rousso
President
HelioPower
Renewable Energy Systems
Remote Power Solutions
mrousso at heliopower.com
www.heliopower.com
760.451.9374


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