A system , comprising: an enclosure from an ambient environment, including: a generator compartment including a first inlet region and a first outlet region in fluid communication with the ambient environment; an engine compartment including a second inlet region in fluid communication with the generator compartment and a second outlet region in fluid communication with the ambient environment; and a bulkhead between the generator and engine compartments to at least substantially fluidly separate the generator and engine compartments ; a radiator in the generator compartment , wherein a pressurized gas in the generator compartment flows along a first gas flow path through the radiator and out of the generator compartment through the first outlet region ; a generator at least partially in the generator compartment , the generator having a second gas flow path through the generator and the bulkhead including a generator inlet region opening into the generator compartment and a generator outlet region in fluid communication with the second inlet region; an engine in the engine compartment , the engine coupled to the radiator for cooling and coupled to the generator to drive the generator ; wherein the generator compartment and the engine compartment are horizontally spaced from one another, the radiator is arranged above the generator in a top portion of the generator compartment ; and an exhaust aftertreatment system coupled to the engine to clean combustion gases exiting the engine , the exhaust aftertreatment system being arranged above the engine compartment . an enclosure from an ambient environment, including: a generator compartment including a first inlet region and a first outlet region in fluid communication with the ambient environment; an engine compartment including a second inlet region in fluid communication with the generator compartment and a second outlet region in fluid communication with the ambient environment; and a bulkhead between the generator and engine compartments to at least substantially fluidly separate the generator and engine compartments ; a generator compartment including a first inlet region and a first outlet region in fluid communication with the ambient environment; an engine compartment including a second inlet region in fluid communication with the generator compartment and a second outlet region in fluid communication with the ambient environment; and a bulkhead between the generator and engine compartments to at least substantially fluidly separate the generator and engine compartments ; a radiator in the generator compartment , wherein a pressurized gas in the generator compartment flows along a first gas flow path through the radiator and out of the generator compartment through the first outlet region ; a generator at least partially in the generator compartment , the generator having a second gas flow path through the generator and the bulkhead including a generator inlet region opening into the generator compartment and a generator outlet region in fluid communication with the second inlet region; an engine in the engine compartment , the engine coupled to the radiator for cooling and coupled to the generator to drive the generator ; wherein the generator compartment and the engine compartment are horizontally spaced from one another, the radiator is arranged above the generator in a top portion of the generator compartment ; and an exhaust aftertreatment system coupled to the engine to clean combustion gases exiting the engine , the exhaust aftertreatment system being arranged above the engine compartment . <EOS>