Energy Services Interface (ESI)

The meter Smart Street Lighting when the HAN radio is activated. An active ESI enables communication to and from HAN devices in the customer location. The ESI can support Zigbee, in which case it functions as a portal and communicates with ZigBee HAN devices. The ESI can also support a custom direct load control (DLC) protocol; in this case, the ESI is embedded inside a device — such as a load control switch (LCS) or electric vehicle supply equipment (EVSE)— and can control some of its functions.