V2 22kW UB-T without cable Wallbox zappi is the leading intelligent charging system for PV surplus charging at home - with no additional components required. zappi can be used with any PV and battery inverter, regardless of the manufacturer. For everyone who wants to be flexible in the future. With the 3 different charging modes ECO, ECO+ and FAST, you can either use zappi in FAST mode like a normal charging station or make the charging power dependent on the current energy generation and energy consumption with the ECO and ECO+ charging modes. Charge with up to 100% of your own solar power.