This is inexpensive PEM fuel cell stack test station model #1957-01. This station is designed for testing small to medium fuel cell stacks, up to 1 kW of power output. Maximum stack voltage 100 volt open circuit, maximum current 50 amp. This is one example of available test station 1957 series. Rugged construction and ease of use makes this series of stations ideal for research work in the area of small to medium fuel cell stacks.