Why solar cells have a wind speed meter?
I'm sure the Photo Voltaic cells and the anemometer are independent of each other. They are just monitoring windspeed and direction for their own purposes, like potentially putting up a wind turbine perhaps. Who knows why, but one does not need the other. By the way, as I don't know your knowledge level on these things, Solar cells produce DC Voltage only, and must go through a DC to AC inverter to be of use to common wall supplied appliances. This piece of equipment is complex and expensive.