Buses will be deployed on the Edmonton Transit Service (ETS) network starting 2018.
Regional transport agency threatens to cancel contract over continued delays in delivering a prototype train.
Contract is valued at $2.4 million.
Opposition lawmakers have criticized how the US$3.7-billion project was initially awarded.
FCvelocity-HD7 fuel cell modules will be used as range extenders in Poland-based Solaris’ electric buses.
Primotive technology charges buses by underground induction stations at bus stops.