TransPower USA, a small but rapidly-growing California corporation, is developing two complementary and potentially game-changing products: a battery-electric drive system for large vehicles such as trucks and buses, and a battery-based stationary fast energy storage system for renewable energy and grid applications. Variants of TransPower's "ElecTruck" drive system are being developed for Class 8 trucks and terminal tractors, with plans in work for adapting the system to other types of vehicles such as transit buses, school buses, and smaller trucks. TransPower's "Grid-Saver" energy storage system is being developed to store surplus energy produced by large solar photovoltaic, wind, and other distributed energy sources, and to help maintain stability of the electric power grid through load balancing and coordinated control of voltage and reactive power. TransPower is developing advanced battery integration, power conversion, and energy management systems that support both its vehicle and stationary energy storage products. A key element of TransPower's strategy is to reduce the cost of its systems by using as many common components as possible in its vehicle and stationary systems. These products also complement each other because stationary energy storage can accelerate adoption of renewable energy, which in turn can be used to recharge electric vehicles in a complete zero-emission cycle.