The Sonoran 3 is a three-phase, online, double-conversion, Solid-state inverter system utilizing patented ECM technology. The Sonoran 3 functions in conjunction with the existing building electrical system to provide high-quality power conditioning, backup power protection and distribution for lighting loads and other critical loads. The enclosure is a NEMA 4 (outdoor) or NEMA 12 (indoor) rainproof/weatherproof enclosure designed for harsh environmental conditions.