The CSV300 power supply is used to supply 12 V devices, such as submersible pumps, fans, lights and similar devices, via a switching power supply (12 V with 24 A/300 VA). No external phono filter is required as the output voltage is filtered. The CSV300 is particularly well-suited to caravans that are mainly connected to the 230 V network and only briefly supply loads from the vehicle battery. The changeover between the supply from the vehicle battery and the (preferred) 230 V mains supply takes place automatically as soon as the mains voltage is available. No charging function. There are 5 separately secured 12 V circuits and a preparation for installing a 230 V circuit breaker.