[bldg-sim] photovoltaic output in DOE-2 and PV Watts

Brian Thornton thorntonenergy at comcast.net
Tue Dec 19 09:27:55 PST 2006


I am simulating a 28.1 kW array in DOE-2 (eQuest 3.6) and in PV Watts.  The
array is flat, on a rooftop with 150 Sanyo 195 modules, and 6 PVPowered
4800W inverters.

 

DOE-2 gives results with 20,600 kWh annual AC production using the standard
model methodology.

 

PV Watts gives about 25,000 kWh annual AC production.  Solar designers in
Portland support this higher value from actual building results.

 

Can anyone share experience with DOE-2 modeled PV output vs. PV Watts, or
offer any suggestions on variables of primary concern in the DOE-2 input?

 

If anyone is truly expert on modeling solar PV in DOE-2, and can validate
results with other calculation tools, I would be interested in hiring you
for some limited consulting.  

 

Brian Thornton, PE

 

Thornton Energy Consulting

p. 503-231-6600 f. 503-231-3555

thorntonenergy at comcast.net

 



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