This adaptive 5-stage battery charger converts 230V mains power to 12V and delivers 30A charging current for the household battery. The 1+1 model also has an additional 3A output for optionally charging a starter battery, a feature that is mainly used on boats. For recreational vehicles, we do not recommend charging the starter battery. Thanks to support for the VictronConnect app via Bluetooth, settings can be easily adjusted and notifications can be managed directly via the smartphone.