Wireless control of building facility systems via a wireless network using a wireless relay controller with a unique identifier. The wireless relay controller receives wireless control signals via a wireless communication network. The wireless relay controller determines that a wireless control signal concerns the wireless relay controller based on the unique identifier. The wireless relay controller further identifies a mode of operation for a specified relay indicated by the wireless control signal and controls the power to the specified relay in accordance with the wireless control signal. The wireless control signal may also monitor the power consumption of the load controlled by the specified relay and send that information to the network.