Abstract: The disclosure provides an uninterruptable power supply (UPS) system for use with an internal combustion engine (ICE)-based system that produces electrical power via operation of the engine (e.g., an ICE inverter generator). The system includes an energy storage device configured to store and provide DC electrical power. The system also includes a DC interface electrically configured to control the transfer of DC electrical power to the energy storage device. The system also includes a DC-AC inverter configured to invert the DC power of the energy storage system to AC power. The system further includes a control system configured to operate at least one of the DC interface, the DC-AC inverter and the energy storage device. The DC-AC inverter may be configured to electrically couple to the ICE-based system to selectively recharge the energy storage system via the power produced thereby. The system may or may not include the ICE-based system.

Abstract: The disclosure provides an uninterruptable power supply (UPS) system for use with a vehicle with an internal combustion engine, an onboard first energy storage device configured to store and provide DC electrical power for at least one of cranking and starting the engine, and a charging device configured to provide a recharging power to the first energy storage device. The UPS system includes a second energy storage device configured to store and provide DC electrical power, and a DC interface electrically coupled between the first and second energy storage devices. The UPS system further includes a DC-AC inverter electrically coupled to the second energy storage system configured to invert the DC power to AC power, an AC power interface electrically coupled to the DC-AC inverter configured to provide an electrical connection to an external load, and a control system configured to selectively operate the charging device of the vehicle.