The Sion can be used as a home storage system in conjunction with the wallbox. The vehicle and building are connected via a Type 2 plug. The same connection is used to charge the Sion and supply the building. It is therefore not necessary to change the charging cable.
Using the Sono app, the user can set up what proportion of the battery capacity they want to supply the building with, as well as how much range is needed the next morning.
A home energy management system (HEMS) controls when the vehicle is charged and discharged. The HEMS monitors the house’s grid connection point. If the PV system generates more electricity than the house consumes, the Sion is charged. If the PV system does not generate enough electricity to supply the house’s energy consumption, the additional energy required is fed into the house via the Sion. In this case, no more energy is fed into the house than is necessary, i.e. no energy is released into the national grid.
The wallbox is equipped with various interfaces to enable integration into the local HEMS: Modbus, OCPP, EEBUS (planned). Communication takes place via ethernet or wifi.