Ballard is planning to deliver the fuel cell modules in the next year.

The company is currently in negotiations with the City of Sao Paulo for a final agreement.

Ballard president and CEO John Sheridan said in combination with the company’s recently announced supply agreement for 21 modules to power buses in Europe , this points to significant progress toward commercialization of zero-emission fuel cell buses in 2012.

Ballard’s sixth generation FCvelocity-HD6 fuel cell module features a control unit which interfaces with a system controller to make it a plug-and-play product for any fuel cell or hybrid fuel cell bus platform.