Hi Jim,
There are different ways to define the capacity factor, which is why it is not an ideal metric.
In SAM, the capacity factor reported by the wind power model is calculated as follows:
Capacity Factor = Annual AC Energy in Year 1 (kWh/yr) / ( System Nameplate Capacity (kW) * 8760 (h/yr) )
For more see the "Capacity Factor" topic in Help:
samrepo.nrelcloud.org/help/mtp_capacity_factor.html
Best regards,
Paul.