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Generac MDG25IF4 Specs (Power | Voltage | Weight)

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

The Generac MDG25IF4 compressor is listed with standby output of 25 kW, Diesel fuel, 60 Hz operation, 120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 V output, rated current of 104 A @ 25% load; 83 A @ 20% load, and sound level of 67 dBA @ 23 ft (7 m).

Generac Generator Specifications

Generator • Diesel • 60 Hz

Standby power: 25 kWVoltage: 120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 VRated current: 104 A @ 25% load; 83 A @ 20% loadDry weight: 1,975 lb (896 kg)

Key specifications

25 kWStandby power
DieselFuel
120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 VVoltage
104 A @ 25% load; 83 A @ 20% loadRated current
1,975 lb (896 kg)Dry weight
67 dBA @ 23 ft (7 m)Sound level
60 HzFrequency

Visual model specs

Built only from this model’s supplied generator specifications.

Power output
Low 20 kW High 25 kW
Standby

25 kW

Prime

20 kW

Fluid capacities
Low 2.75 gal High 4.39 gal
Oil

2.75 gal

Coolant

4.39 gal

Model spec snapshot
Representative numeric specifications from this generator.
25 kWStandby
1,975.34 lbWeight
67 dBASound

How the Generac MDG25IF4 compares

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

Standby power
25 kW
20% above avg
81st percentile
Dry weight
1,975 lb
126% above avg
93rd percentile
Sound level
67 dBA
In line with avg
61st percentile
Oil capacity
2.75 gal
186% above avg
95th percentile
Standby power25 kW
Low 15 kWAverage 20.8 kWHigh 27 kW

About 20% above the similar-output Generac average. Around the 81st percentile for this field.

Dry weight1,975 lb
Low 419 lbAverage 873 lbHigh 2,176 lb

About 126% above the similar-output Generac average. Around the 93rd percentile for this field.

Sound level67 dBA
Low 55 dBAAverage 65.7 dBAHigh 72 dBA

Very close to the similar-output Generac average. Around the 61st percentile for this field.

Oil capacity2.75 gal
Low 0.47 galAverage 0.96 galHigh 2.8 gal

About 186% above the similar-output Generac average. Around the 95th percentile for this field.

This model Peer average

Generator information

Manufacturer Generac
Model MDG25IF4
Generator type Generator
Fuel Diesel
Frequency 60 Hz

Electrical output

Standby power 25 kW
Prime power 20 kW
Standby kVA 31.0
Voltage options 120/240 V, 208/120 V, 240/120 V, 480/277 V, 600/346 V
Rated current 104 A @ 25% load; 83 A @ 20% load
Power factor 1.0
Circuit breaker 125 A

Engine, cooling and controls

Oil capacity 2.75 gal (10.4 L)
Coolant capacity 4.39 gal (16.6 L)
Maximum ambient 120 °F (49 °C)
Controller Electronics DSE7310 MKII
Alternator Marathon 282PSL1705 (4-pole, Class Class H insulation)
Emissions Tier 4 Final

Physical specifications

Dry weight 1, 975 lb (896 kg)
Dimensions (L × W × H) 70.1 × 35 × 48 in (1780 × 890 × 1220 mm)
Sound level 67 dBA @ 23 ft (7 m)

Battery

Battery cranking 720 CCA
Battery voltage 12 V
Battery quantity 1

Fuel system and runtime

Fuel tank 61.8 gal (234 L)
Tank runtime 35 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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