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Generac MMG405 Generator Set

The Generac MMG405 is a 358 kW (447 kVA) diesel standby generator set powered by a John Deere RG6135HF485 engine. It is available at 120/208 V and 277/480 V, 3-phase and 60 Hz. It holds 90.4 L (23.9 gal) of coolant, with a maximum ambient rating of 48.89 °C. Starting uses 2 batteries rated 1000 CCA. The set measures 4450×1520×2440 mm (175.2×59.8×96.1 in), weighs about 5779 kg (12740 lb) and produces 68 dBA at 7.01 m. An integrated tank holds 2331.8 L (616.0 gal), roughly 29 hours of runtime. The same RG6135HF485 engine also powers generator sets from Magnum.

358 kW
Standby
13.5 L
Displacement
1
Document types

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Specifications

Fueldiesel
Frequency60.0 Hz
Standby power358 kW
Standby kVA447
Prime power326 kW
EmissionsTier III
ControllerMicroprocessor-based controller
Voltage options120/208 V, 277/480 V
Phasethree phase
Circuit breaker1600 A
Battery cranking1000 CCA
Battery quantity2
Max ambient48.89 °C
Dimensions (L×W×H)4450×1520×2440 mm
Dry weight5779 kg
Sound level68.0 dBA @ 7.01 m
Fuel tank2331.8 L
Tank runtime29 hr

Engine

John Deere RG6135HF485
Coolant capacity90.4 L
Displacement13.5 L
Aspirationturbocharged
Rated speed1800 rpm

Same engine, other brands

1 brand

The John Deere RG6135HF485 in this set also powers 3 generator sets sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.

BrandModels
MagnumMMG405, MMG405 Super Start, MMG465

Maintenance & consumables

for the John Deere RG6135HF485
ItemSpecCapacityPart #Interval
Air filterpaper element—

Common questions

How many kW is the Generac MMG405?

The Generac MMG405 is rated 358 kW standby (447.0 kVA).

What engine does the Generac MMG405 use?

The Generac MMG405 is powered by the John Deere RG6135HF485 engine.

Is the Generac MMG405 diesel or gas?

The Generac MMG405 runs on diesel.

What is the coolant capacity of the Generac MMG405?

The Generac MMG405 cooling system holds 90.4 liters (23.9 US gallons) for the engine, per the manufacturer specification sheet.

What is the continuous rating of the Generac MMG405?

The Generac MMG405 is rated 326 kW prime (408 kVA), against 358 kW standby.

How loud is the Generac MMG405?

The Generac MMG405 is rated at 68.0 dBA at 7.01 m, per the manufacturer specification sheet.

How much does the Generac MMG405 weigh?

The Generac MMG405 has a dry weight of 5779 kg (12740 lb).

How big is the fuel tank on the Generac MMG405?

The Generac MMG405 has a 2331.8 liter (616 US gallon) fuel tank, giving about 29 hours of runtime.

What voltage does the Generac MMG405 produce?

The Generac MMG405 is offered in 120/208 V, 277/480 V, three phase-phase.

What size battery does the Generac MMG405 need?

The Generac MMG405 uses 2 batteryies, 1000 CCA, per the manufacturer specification sheet.

Fuel consumption

RatingLoadL/hgal/h
Prime50%40.110.6
Prime75%59.815.8
Prime100%79.921.1

Available documents

Parts manual — 20435 (Generac)

This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.