Patent ID: 7960857

Claim:
A vehicle-based uninterruptable power supply (UPS) system comprising: an energy storage system located on-board a vehicle, the energy storage system configured to provide electric power for at least one of driving an electric motor of the vehicle and powering auxiliary devices of the vehicle and to also generate DC power transferable to an external load; an DC-AC inverter connected to the on-board energy storage system to receive the DC power therefrom and invert the DC power to an AC power useable by the external load; a charging device located on-board the vehicle and connected to the on-board energy storage system to provide a recharging power thereto; and a control system configured to: cause the energy storage system to provide power transferable to the external load by way of the DC-AC inverter; determine one of a state-of-charge (SOC) and a voltage of the energy storage system while the energy storage system is providing power to the external load; and selectively operate the charging device to provide the recharging power to the energy storage system to maintain the one of the SOC and the voltage of the energy storage system within a pre-determined range while still providing power to the external load, such that the energy storage system provides uninterruptable power to the external load.