Chart for impact of space between panels and roof [RE-wrenches]

[Michael Welch]

Hi Steve. Home Power just published an article that includes similar info.

For string sizing purposes, these correction temperatures are intended to be added to the highest average ambient temperature at the array's location.
• Parallel to roof (<6 in. standoff): +35°C
• Rack-type mount (>6 in. standoff): +30°C
• Top-of-pole mount: +25°C

The article also goes into detail about what temperature figures mean for array voltage and power.

Steve Johnson wrote at 12:17 PM 5/16/2008:
 
>Yes I'm aware of that but I'm referring to a study with a chart that 
>shows performance dergradation relative to distance from roof.  Like at 
>1", 2", 3" 4", 5",6". 
>
>Since I already know what to do why do I need this? One word.
>"Customer"
>
>This is a highly monitored job with temperature sensors etc.


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