Methods and system are provided for operating an energy producing device when a utility grid is unavailable. The energy producing device includes a power system receiving power from a generator of the energy producing device. The power system includes a main power component and an accessory power component, where the received power is provided to the main power component and accessory power component depending upon the availability of the utility grid. The main power component provides the received power to the utility grid and the accessory power component provides power to accessories of the energy producing device, wherein the power includes the received power and power from an energy storage device included within the accessory power component.