A self contained engine driven electrical generator having two easily separable major components. The first is a support section which includes the fuel tank for the generator and structural support means interconnecting portions of the fuel tank. The support section also facilitates mounting the generator to a refrigerated container with which it is adapted to be used. The second section is a power generation section, which includes the engine, the electrical generator and the radiator for cooling the engine, all integrally assembled into an easily removable unit. Other major components of the generator, including a control box, battery, battery charger, air filter, fuel filter, and muffler form integral parts of the power generation section. All mechanical, fuel and electrical connections may be readily disconnected to facilitate removal of the power generation section from the support section.