PV wind performance enhancing method and apparatus

Pressure equalization between upper and lower surfaces of PV modules (14) of an array (12) of PV modules can be enhanced in several ways. Air gaps (32, 34) opening into the air volume, defined between the PV modules and the support surface (16), should be provided between adjacent PV modules and along the periphery (18) of the array. The ratio of this air volume to the total area of the air gaps should be minimized. Peripheral wind deflectors (20) should be used to minimize aerodynamic drag forces on the PV modules. The time to equalize pressure between the upper and lower surfaces of the PV modules should be maintained below, for example, 10-20 milliseconds. The displacement created by wind gusts should be limited to, for example, 2-5 millimeters or less.; For inclined PV modules, rear air deflectors (148) are advised for each PV module and side air deflectors (162) are advised for the periphery of the array.