NOTE:

-To better accommodate differences in the thermal environment of different mounting methods, INOCT value is passed.
INOCT RANGE: 35 to 70 Defalult: 45
Function of module NOCT and installation, from Sandia Report SAND85-0376:
Rack mount: inoct = noct - 3
Direct mount: inoct = noct +18
1" standoff mount: inoct = noct + 11
3" standoff mount: inoct = noct + 2
6" standoff mount: inoct = noct -1

-Differences by manufacturer or model in power degradation due to temperature may be accommodated with Power degradation value.
Power degradation range: -0.010 to 0.0001 Default:-0.005 (-0.5% per degree C)

Keep in mind that PVWATTS has not been validated for technologies other than crystalline silicon.

For more information on how PVWATTS v.2 calculates PV performance, please see More About PVWATTS.