Doosan Infracore Portable Power has upgraded several models in its mobile generator portfolio to meet the EPA’s current standards for mobile, off-highway, diesel-powered equipment. The portfolio now includes a total of 10 models ranging from 25 kVA to 570 kVA. The G25 and G40 are powered by Mitsubishi engines that are certified to EPA Tier 4 interim requirements in effect until 2013 when Tier 4 final standards become effective for this horsepower category. The G70 and G90, rated at 72 kVA and 94 kVA respectively, are powered by John Deere engines that are certified to EPA Tier 3 requirements in effect until 2012 when Tier 4 interim standards become effective. The G145, G185 and G240, powered by John Deere engines, and the G290, powered by Cummins, have been in production with EPA Tier 3 certification since 2007. These models, rated at 144 kVA, 183 kVA, 239 kVA and 290 kVA respectively, will continue until 2011, at which time Tier 4 interim standards for this horsepower category become effective. At the top of the range are the G450 and G570, powered by Cummins and rated at 456 kVA and 570 kVA respectively, have been in production since 2007 with EPA Tier 2 certification, the current requirement for engines rated greater than 751 hp. In 2011, the Tier 4 interim standard for this horsepower category becomes effective.