Fronius FR SYMO 3.7-3-S network inverter for photovoltaics

The Quattro can be connected to two independent AC power supplies, for example to a ground power source and to one generator, or to two generators. The Quattro automatically connects to the active power source. Quattro prevents overloading of a source with limited AC voltage. First, the battery charge decreases automatically when there may be an overload. The second level increases the power of a generator or secondary supply from a ground source with battery power.

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Two AC inputs with integrated transfer switch
The Quattro can be connected to two independent AC power supplies, for example to one ground power source and one generator, or to two generators. The Quattro automatically connects to the active power source.

Two AC outputs
The main output operates as an uninterruptible power supply. The Quattro takes over the power supply of the connected loads in case of failure in the network or when the main power supply / generator is disconnected. This happens almost instantly (in less than 20 milliseconds) so that computers and other electronic devices can continue to run without interruption. The second output is only active when the main AC power supply is available at one of the Quattro inputs. In this way, loads that should not be supplied by the battery in an emergency, such as e.g. a water heater, can be connected to this output.

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