Jenbacher AG (JAG) has designed with General Electric (GE) a new container-based gas engine gen-set package for the GE rental fleet. All necessary system components like the natural gas engine, alternator, cooling fans, electrical units and auxiliaries are integrated in one 40-foot ISO container which is normally placed on a trailer truck. A unit weight of less than 53,000 lbs ensures easy transport from site to site. The gas and electricity connections are designed to ensure the lowest possible installation and setup times. The application of a closed loop cooling system inside the container has the advantage that no additional connections are necessary. Connections for heat recovery are integrated, and can easily be utilized if there is a demand. Another important feature is that the gen set is not influenced to a great extent by changes in environmental conditions. Ambient temperatures of up to 104°F (40°C) are still permissible without reduction of power output. Container insulation and exhaust gas silencer design are optimized to attain a noise level of 74 dB(A) at a distance of 7 m.