The Sunny Boy 5000US, 6000US and 7000US represent SMA's larger units in the new “US” series of Sunny Boy string inverters. They are extremely robust inverters equally suited for large residential or commercial applications. Completely updated with SMA's most advanced technology, they were designed specifically to meet the new IEEE 1547 requirements. The larger inverters of the new US series come with an integrated AC and DC disconnect switch making installation even more cost-effective. They can even be configured for positive ground systems in the field making them more versatile than ever. Increased efficiency means better overall performance and shorter payback periods. The Sunny Boy 6000US and 7000US are compatible for use with the Sunny Tower 36 kW and 42 kW systems. Each comes with a standard ten year warranty and are engineered and built to provide years of trouble-free service.