The main output has no-break functionality. The Quattro takes over the supply to the connected loads in the event of a
grid failure or when shore/generator power is disconnected. This happens so fast (less than 20 milliseconds) that
computers and other electronic equipment will continue to operate without disruption.
The second output is live only when AC is available on one of the inputs of the Quattro. Loads that should not discharge
the battery, like a water heater for example, can be connected to this output