HomeCompare40–45 kW Diesel

40–45 kW Diesel Generators Compared

51 40–45 kw diesel generator models side by side — power, phase, sound level, weight and fuel tank capacity, compiled from manufacturer specification sheets.

ModelStandbyPhaseSoundWeightFuel tank
Kohler 40EKOZD40.0 kW1551.0 kg
Kohler 40EFOZ40.0 kW3943.0 kg
Kohler 40EORZD40.0 kW
Kohler 40EOZ40.0 kW3910.0 kg
Generac ED04040.0 kW
Olympian GEP50-740.0 kW871.0 kg219.0 L
MTU 4R0113 DS4040.0 kW380.5 dBA943.0 kg
Cummins/Onan C40 D640.0 kW3945.0 kg200.0 L
Caterpillar C4.440.0 kW3-Phase1029.0 kg250.0 L
Caterpillar D4040.0 kW3 phase306.0 kg
Caterpillar D40-640.0 kWsingle
MQ Power DCA45USIXF40.0 kWswitchable58.0 dBA1700.0 kg751.0 L
Caterpillar C2.240.0 kW66.5 dBA530.0 kg
AKSA APD-ULJ4040.0 kW3PH
MTU 4R0113 DS40 SCAQMD40.0 kW
MTU MTU 4R0113 DS4040.0 kW80.5 dBA943.0 kg
aurora AGi40H40.0 kW173.0 kg45.0 L
Westquip WQ40T4H40.0 kW625.0 kg
Cummins/Onan DGAE40.0 kWI,3
Cummins/Onan C40D6R40.0 kWWye, 3-phase1490.0 kg
Olympian GEP5040.0 kW3 Phase840.0 kg176.0 L
Toyota 32-8FG1040.0 kW45.0 L
Toyota 62-8FD1040.0 kW45.0 L
Iveco/FPT GE NEF 45M40.0 kW
Generac RD04040.0 kW1Ø,3Ø65.0 dBA886.0 kg257.4 L
Cummins/Onan DEG-515R40.0 kW1
Cummins/Onan 40DDB40.0 kW1-3
Emsa E IV ST 005040.0 kW970.0 kg
Olympian D40P440.0 kW
Echo DGK45F40.0 kW366.0 dBA1195.0 kg300.0 L
kWiet Power DGK125F40.0 kWSingle- and three-phase58.0 dBA625.0 kg
Olympian D40P340.0 kW
Olympian D40P240.0 kW
Mitsubishi 40REOZT41.0 kW
Kohler 40REOZK42.0 kW787.0 kg
Kohler 40REOZT42.0 kWSingle65.0 dBA1769.0 kg
Atlas Copco QES 5042.0 kW69.0 dBA896.0 kg116.0 L
Mitsubishi MDG4042.0 kW1-3 switchable
kWiet Power DGK180F42.0 kWSingle- and three-phase58.0 dBA625.0 kg
Hatz 3M4143.3 kW333.0 kg
MTU 4R0113 DS5544.0 kW377.6 dBA943.0 kg
Cummins/Onan C55 D544.0 kW3955.0 kg
Olympian GEP55-344.0 kW3863.0 kg219.0 L
Generac MMG45IF444.0 kWthree phase66.0 dBA1525.0 kg379.0 L
Kubota V2403-M-T-E3B44.0 kWCounterclockwise Viewed on Flywheel1960.0 kg
AKSA AD4444.0 kW365.0 dBA800.0 kg100.0 L
Emsa E IV ST 005544.0 kW970.0 kg
Cummins/Onan BCC 55-5044.0 kW3232.0 L
FG Wilson P55-1ES44.0 kW3
Morse GC44.5 kW3159.0 L
Morse GCRS-40-4044.5 kW3159.0 L

Common questions

Which 40–45 kW Diesel generator is quietest?

Among 40–45 kW Diesel generators in this comparison, the MQ Power DCA45USIXF is quietest at 58.0 dBA.

Which 40–45 kW Diesel generator is lightest?

Among 40–45 kW Diesel generators in this comparison, the aurora AGi40H is lightest at 173.0 kg dry weight.

Which 40–45 kW Diesel generator has the largest fuel tank?

Among 40–45 kW Diesel generators in this comparison, the MQ Power DCA45USIXF has the largest fuel tank at 751.0 L.

Not every model reports every spec — blanks mean the source document didn't state that figure, not that the value is zero.