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Generac MMG55DF4 Specs (Power | Voltage | Weight)

Written by Ernie Lo in Specs Last Updated August 18, 2026

The Generac MMG55DF4 compressor is listed with standby output of 48 kW, diesel fuel, 60 Hz operation, 120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 V output, Three phase, rated current of 72 A, and sound level of 68 dBA @ 23 ft (7 m).

Generac Generator Specifications

Generator • diesel • 60 Hz • Three phase

Standby power: 48 kWVoltage: 120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 VRated current: 72 ADry weight: 3,305 lb (1,499 kg)

Key specifications

48 kWStandby power
dieselFuel
120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 VVoltage
Three phasePhase
72 ARated current
3,305 lb (1,499 kg)Dry weight
68 dBA @ 23 ft (7 m)Sound level
60 HzFrequency

Visual model specs

Built only from this model’s supplied generator specifications.

Power output
Low 44 kW High 48 kW
Standby

48 kW

Prime

44 kW

Fluid capacities
Low 2.75 gal High 4.49 gal
Oil

2.75 gal

Coolant

4.49 gal

Model spec snapshot
Representative numeric specifications from this generator.
48 kWStandby
72 ACurrent
3,304.73 lbWeight
68 dBASound

How the Generac MMG55DF4 compares

This compares the supplied numeric specification with Generac generators in the same broad standby-power class where enough comparable data exists.

Standby power
48 kW
15% above avg
75th percentile
Dry weight
3,305 lb
79% above avg
94th percentile
Sound level
68 dBA
In line with avg
45th percentile
Oil capacity
2.75 gal
49% above avg
80th percentile
Standby power48 kW
Low 30 kWAverage 41.7 kWHigh 55 kW

About 15% above the similar-output Generac average. Around the 75th percentile for this field.

Dry weight3,305 lb
Low 821 lbAverage 1,841 lbHigh 3,333 lb

About 79% above the similar-output Generac average. Around the 94th percentile for this field.

Sound level68 dBA
Low 54 dBAAverage 68.9 dBAHigh 81.8 dBA

Very close to the similar-output Generac average. Around the 45th percentile for this field.

Oil capacity2.75 gal
Low 1 galAverage 1.84 galHigh 4.29 gal

About 49% above the similar-output Generac average. Around the 80th percentile for this field.

This model Peer average

Generator information

Manufacturer Generac
Model MMG55DF4
Generator type Generator
Fuel diesel
Frequency 60 Hz

Electrical output

Standby power 48 kW
Prime power 44 kW
Standby kVA 60.0
Voltage options 120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 V
Phase Three phase
Rated current 72 A
Power factor 0.8
Circuit breaker 225 A

Engine, cooling and controls

Oil capacity 2.75 gal (10.4 L)
Coolant capacity 4.49 gal (17 L)
Maximum ambient 120 °F (49 °C)
Controller DSE 7310 MKII, Electronics DSE7310 MKII
Alternator Marathon 286PSL1701
Emissions Tier 4 Final

Physical specifications

Dry weight 3, 305 lb (1, 499 kg)
Sound level 68 dBA @ 23 ft (7 m)

Battery

Battery cranking 720 CCA
Battery voltage 12 V
Battery quantity 1

Fuel system and runtime

Fuel tank 100.1 gal (379 L)
Tank runtime 28 hr

Disclaimer: Specifications should be verified against the official owner’s manual and confirmed on the Generac USA website.

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Ernie Lo

Ernie Lo is a qualified web designer and web developer. He works as an IT support technician and website manager at Benleigh Vending, and he also fixes vending machines.

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