[RE-wrenches] Insolation radiation to performance numbers...

[I2P at aol.com]

In a message dated 11/4/2008 11:07:49 A.M. Pacific Standard Time,  
billbrooks7 at yahoo.com writes:

Don, 
PV:WATTS  version 1 is easiest to use and it is available at 
_http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/_ 
(http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/) .  It covers fixed tilt, single- and two-axis 
tracking for standard crystalline  silicon modules. My confusion had to do with 
whether the 5.9 kWh/m2/day was a  fixed tilt value or single-axis tracker. Not 
knowing the location makes that  impossible to figure out. PV:WATTS version 2 is 
what the CSI program uses to  calculate EPBB rebate. Unfortunately, the EPBB 
calculator does not access the  single- and two-axis tracking parts of PV:WATTS 
version 2.  

PVSYST  is available online from Switzerland at _www.pvsyst.com_ 
(http://www.pvsyst.com/)  
Bill.


 
 
Thanks Bill, I use PV WATTS routinely. I see they want a bit of $ for  PVSYST 
so I need to think about that one. I agree that backing out the numbers  from 
the given info is tough without more detailed site data.
 
Best,Don
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