Enova Systems, Inc. (Enova) is engaged in the development, design and production of power train systems and related components for electric and hybrid electric buses and medium and heavy duty commercial vehicles. Electric drive systems are comprised of an electric motor, electronics control unit and a gear unit which power a vehicle. Its focus is power train systems, including digital power conversion, power management and system integration, focusing on vehicle power generation. The Company develops and designs and produces drive systems and related components for electric, hybrid electric and fuel cell powered vehicles in both the new and retrofit markets. It also performs internal research and development (R&D) and funded third party R&D to augment its product development and support its customers.During the year ended December 31, 2012, the Company delivered a total of 58 full systems units of Enova drive systems to its customers.