This type of system, often called a Genverter , reduces generator run time, significantly reducing the cost of generating power. When the battery bank is recharged and the need for generator power diminishes, the generator is shut down and the battery bank supplies power to the inverter, changing the DC input to normal household AC current.
Many systems are fully automatic.
When the batteries need recharging the inverter starts the generator, brings the battery bank back up to capacity and then shuts down the generator. The system schematic below demonstrates how Genverter systems are configured. Note that other charging systems such as solar or wind can also be added, further reducing the need to run the generator. The system below uses two inverters, each producing 120 VAC, thus duplicating power supplied to the home by the generator or power grid. This type of system can be both grid and generator connected.