Methods, systems, and apparatus, for wirelessly controlling electrical loads. In an aspect, a system include a wireless controller with a communication subsystem that communicates with a plurality of power control devices over a first network, communicates with a wireless smart metering device over a second network, communicates with a system controller over a third network. The system receives an event message from one or more of the wireless smart metering device over the second network or the system controller over the third network, generates one or more power commands for the power control devices, the one or more power commands configured to cause the power control devices to adjust one or more power loads in response to the event message, and transmits the one or more power commands to the power control devices over the first network.