The Vancouver Sun reports in its Thursday edition Ballard Power Systems' revenue so far this year is 21 per cent below management estimates and, as a result, the Vancouver company is adjusting its 2014 guidance. A Canadian Press dispatch to The Sun says Ballard now estimates full-year revenue growth of 20 per cent, rather than 30 per cent. Ballard Power develops fuel cell technology, an alternative energy source. Its revenue was $20.6-million in the third quarter and $53.1-million in the nine months ended Sept. 30, up 21 per cent on both counts. Ballard's net loss was reduced by 47 per cent to $2.4-million or two cents per share in the third quarter and by 39 per cent to $10.7-million or eight cents per share in the nine months ended Sept. 30. Last year, Ballard lost $4.6-million or five cents per share in the third quarter with $17-million of revenue. Over the first nine months of 2014, Ballard lost $17.7-million or 18 cents per share with $43.9-million of revenue. Ballard closed Wednesday at $3.09, down 26 cents on the Toronto Stock Exchange.