The Outback FLEXpower Dual system comes fully assembled and tested from the Outback factory. The units are built to meet National Electric Code (NEC) standards and designed for ease of installation. FLEXpower FXR systems can be used for both off-grid and grid-tie configurations. The systems have been outfitted with all the necessary wiring, circuit breakers, communications, battery monitoring and PV ground fault protection. All equipment is ETL listed. The FLEXpower Dual FX-R Series is perfect for nearly any type of application: residential and commercial applications including cabins, vacation homes, farm buildings, remote communications sites and back-up power systems, with all necessary components integrated into a compact hang-on-the-wall system with a minimal footprint. The FLEXpower systems are designed for fast installation which cuts down on time and cost. The system comes with a mounting bracket that attaches to your wall, which then allows you to hang the FLEXpower system. This allows you to get up and running very quickly; simply connect the PV input, AC output, and battery connection.