An energy management system. The system includes a coax controller apparatus comprising an exterior housing and plurality of coax modules numbered from 2 through N, where N is an integer greater than 3. In a specific embodiment, each of the coax modules comprises a powerline chip (PLC) module coupled to an analog front end, which is coupled to a coaxial connector. The system also has an electromagnetic shield configured to each of the coax modules. In a specific embodiment, the electromagnetic shield is configured to substantially maintain the coax module substantially free from interference noise or other disturbances. The system has a power meter coupled to one or more ports of the coax controller apparatus.