To use the Energy Display you only need a Wi-Fi connection and power via the USB cable (cable included). The more graphs you have in the app, the more choices you have to configure your dashboard on the Energy Display. To configure your own screen you can choose from: - Total power consumption (P1 Meter) - Gas consumption (P1 Meter) - Water usage (Watermeter) - Power consumption of any device with a plug (Energy Socket) - Solar panels (kWh Meter or solar inverter) - Power consumption of a car charger, heat pump or a group in your circuit breaker box (kWh Meter) - Gross power consumption (Energy+) - Solar consumption (Energy+ and solar inverter insights) - Ambient temperature The Energy Display can be used if you have at least 1 HomeWizard product. But the more products you use, the more graphs you can configure in the Energy Display.