fuelcell energy inc said revenue growth in its second quarter wasnt able to offset higher operating expenses and margin pressures that widened its quarterly loss the maker of hightemperature fuel cells for clean energy generation posted a net loss attributable to the company of 301 million for the quarter ended april 30 compared with a loss of 189 million a year earlier on a pershare basis the net loss attributable to common stockholders was eight cents compared with six cents a year earlier it said analysts surveyed by factset had been expecting a loss of five cents a share revenue grew 17 to 164 million driven by 300 growth in revenue from service agreements along with higher generation revenue contract revenue from its advanced technologies segment fell by a third the company said the danbury connbased company reported a higher gross loss that it attributed to higher manufacturing variances lower margin in its advanced technologies segment and 48 million in costs related to the construction on a project in california