There are two common uses for plug-in energy monitors: Determine the power consumed by various appliances in your home before a power cut, to help establish what can be powered by your home back-up solution e.g. generator, mains inverter or EV V2L cable. Use during a power cut on the output of your back-up power solution, to enable live monitoring of the power being consumed. Basic Unit Plug unit into a 13A socket and then connect an appliance. Provides a live reading on the LCD display of the power being used (watts) and a cumulative total of the power used (kWh). Wi-Fi Unit Plug unit into a 13A socket and then connect an appliance. Download the Android or IoS app. Remotely monitor current power consumption and a cumulative total of the power used (kWh) on any smartphone or tablet. The appliance connected can also be switched on/off, or timers set up using the app. Can be integrated with Google Home, Amazon Alexa and other Wi-Fi based platforms. Based on the popular Tuya platform. Requires a Wi-Fi connection to function. Commerical Applications Please visit our sister site Tough Leads for a range of single and three phase plug in power meters, designed for use with commercial IEC60309 'Commando' connectors.