An energy storage system, more particularly to a power distribution system for providing power for an indeterminate period of time. The power distribution system comprises means for converting the energy from an alternator to AC/DC circuits. The alternator transmits electric current to a battery, where an inverter is electrically connected to the battery and transmits AC power to low-load circuits. A DC control panel is connected to the battery and transmits electric current from the battery to low-load DC circuits. The power system is part of a portable toolbox. The system is connected to a vehicle's charging system or any mechanism having a alternator a first battery an engine and a starting system an would continually recharge it self. The battery for the system is connected to the alternator of a vehicle and or mechanism through an isolator, or connected directly to the alternator or battery of the vehicle and or mechanism and would transmit a direct electric current to the battery for the system which stores the charge. The inverter is electrically connected to the battery for the system and transmits an electric current from the battery to one or more low-load circuits.