Abstract: Provided is an output control method of a parallel battery energy storage device including an inverter. More particularly, the present disclosure relates to an output control method, wherein when an external battery is connected in parallel to an inverter equipped with an internal battery and is used, output power is limited depending on a capacity of the external battery, thereby ensuring user safety.

Abstract: Provided is an output control method of a parallel battery energy storage device including an inverter. More particularly, the present disclosure relates to an output control method, wherein when an external battery is connected in parallel to an inverter equipped with an internal battery and is used, output power is limited depending on a capacity of the external battery, thereby ensuring user safety.

Abstract: A multi-channel upright reformer for a fuel cell is provided, which has a simple structure by breaking from an existing complicated channel structure to allow fluids such as fuel and vapor to be stably flow, thereby improving durability and achieving an efficient reforming reaction and an efficient operation of the fuel cell. A method for manufacturing compactly a reformer by minimizing an area where heat exchange is performed and expand of a fuel cell due to the resulting decrease in manufacturing cost. Also a reformer for semipermanently using by frequently exchanging a catalyst used in a reforming reaction and supply the reformer at a low price by significantly decreasing cost consumed for the catalyst is provided.