Property is owned by City of Oklahoma (airport property)  

The property is owned by the City of Oklahoma as part of the airport property.  While "exempt" from property taxes, the property is part of the Airport Master Plan and included as a revenue generator for non-direct airport revenues.  The Federal Government pays money to lease the property from the City (county).  The property that will be used to set up the large solar panel array is property that will be leased, and will be in addition to the current lease they pay now.   IOWs, while the FAA "saves" money on electricity, it will also cost them for the additional property lease.   No efficiency is the result, in terms of money "saved" when you factor in ALL costs!