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Acquisition should help develop market for Ecotality's hydrogen fuel generator for fuel cells.
Increase in hydrogen gas stations is contributing to expected growth of fuel cell vehicle market within decade, according to Pike Research.
Through acquisitions, Ecotality looks to "roll up" several clean-energy companies and become profitable next year.
Department of Energy-funded project is testing fast chargers and "smart" electrical grids for controlling a potential strain on resources from plug-in hybrid vehicles.