Ballard Power Systems Inc is a world leader in proton-exchange membrane fuel cells, power system development, and commercialization. The company's principal business is the design, development, manufacture, sale, and service of PEM fuel cell products for a variety of applications, focusing on power product markets of heavy-duty motive (bus, truck, rail, and marine applications), material handling, and stationary power generation. Sales are concentrated in the US, Europe, and China.