Two AC inputs with integrated changeover switch The Quattro can be connected to two independent AC sources, for example shore power and an aggregate or two aggregates. The Quattro automatically switches to the active source. Two AC outputs The main output has interruption-free functionality. In the event of a power failure or if the power supply of the shore power is interrupted, the Quattro will take over the power supply for the connected loads. This goes so fast (in less than 20 milliseconds) that computers and other electronic devices can continue to function undisturbed. The second output only becomes active if alternating current is available at one of the inputs of the Quattro. Loads that do not have to discharge the batteries, such as air-conditioning or a kettle, can be connected to this output.