Ballard Power Systems Inc. is turning to the non-automotive market to help boost revenue as the Vancouver-based hydrogen fuel cell company struggles to staunch the flow of red ink due to "slack" sales in its transportation business. The firm, which makes most of its money selling light-duty fuel cells and engines and heavy-duty fuel cell bus engines, said late yesterday it lost $29.5 million U.S. in its second quarter and took in less than half the revenue it did in the year-earlier period