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Generac G40LG2 Generator Set

The Generac G40LG2 is a 40 kW (50 kVA) Natural Gas, Propane Vapor standby generator set powered by a Generac 5.4L engine. It is available at 120/208 V, 120/240 V, 277/480 V and 346/600 V, 3-phase and 60 Hz. It holds about 5.7 L (1.5 gal) of oil and 11.36 L (3.0 gal) of coolant, with a maximum ambient rating of 43.3 °C. The set measures 1930×949.9×1193.8 mm (76.0×37.4×47.0 in) and weighs about 714 kg (1574 lb).

40 kW
Standby
5.4 L
Displacement
5.7 L
Oil capacity
1
Document types

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Specifications

FuelNatural Gas, Propane Vapor
Frequency60.0 Hz
Standby power40 kW
Standby kVA50
Prime power36 kW
ControllerDigital H Control Panel - Dual 4x20 Display
Oil capacity5.7 L
AlternatorGenerac 390
Voltage options120/208 V, 120/240 V, 277/480 V, 346/600 V
Phase3
Battery voltage12 V
Coolant capacity11.36 L
Max ambient43.3 °C
Dimensions (L×W×H)1930×949×1193 mm
Dry weight714 kg

Engine

Generac 5.4L
Oil capacity5.7 L
Coolant capacity11.36 L
Displacement5.4 L
AspirationNaturally Aspirated
Rated speed1800 rpm

Common questions

What is the power rating of the Generac G40LG2?

The Generac G40LG2 is rated 40 kW standby (50.0 kVA).

What engine does the Generac G40LG2 use?

The Generac G40LG2 is powered by the Generac 5.4L engine.

What fuel does the Generac G40LG2 use?

The Generac G40LG2 runs on Natural Gas, Propane Vapor.

What is the oil capacity of the Generac G40LG2?

The Generac 5.4L engine in the Generac G40LG2 has an oil capacity of 5.7 liters.

What alternator does the Generac G40LG2 use?

The Generac G40LG2 uses a Generac 390 alternator.

Fuel consumption

RatingLoadL/hgal/h
Standby25%263.07.5
Standby50%451.012.8
Standby75%609.017.2
Standby100%752.021.3

Available documents

Spec sheet — Olympian G40LG2 5.4L (Generac)