MidNite Solar pre-wired inverter systems offer a turn key solution to installing a battery based inverter system, saving time in the field. With a pre-wired solution all of the confusion is taken out of selecting all the right parts. This system uses the SMA Sunny Island inverter that is rated at 6,000 watts and uses a 48 volt battery. It produces 120 volts AC and has a single AC input. MidNite does offer an automatic transfer relay that can be installed in the E-panel that will allow the Sunny Island to automatically select between two AC inputs (For example the grid or generator).