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Generac RD020 Specs (Power | Voltage | Weight)

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

The Generac RD020 compressor is listed with standby output of 20 kW, diesel fuel, 60 Hz operation, 120/240 V, 120/208 V output, Single phase / Three phase, rated current of 70 / 60 / 50 A, and sound level of 70 dBA @ 23 ft (7 m).

Generac Generator Specifications

Generator • diesel • 60 Hz • Single phase / Three phase

Standby power: 20 kWVoltage: 120/240 V, 120/208 VRated current: 70 / 60 / 50 ADry weight: 1,224 lb (555 kg)

Key specifications

20 kWStandby power
dieselFuel
120/240 V, 120/208 VVoltage
Single phase / Three phasePhase
70 / 60 / 50 ARated current
1,224 lb (555 kg)Dry weight
70 dBA @ 23 ft (7 m)Sound level
60 HzFrequency

Visual model specs

Built only from this model’s supplied generator specifications.

Power output
Low 16 kW High 20 kW
Standby

20 kW

Prime

16 kW

Fluid capacities
Low 1.72 gal High 3.01 gal
Oil

1.72 gal

Coolant

3.01 gal

Model spec snapshot
Representative numeric specifications from this generator.
20 kWStandby
1,223.57 lbWeight
70 dBASound

How the Generac RD020 compares

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

Standby power
20 kW
4% below avg
44th percentile
Dry weight
1,224 lb
40% above avg
75th percentile
Sound level
70 dBA
7% above avg
88th percentile
Oil capacity
1.72 gal
79% above avg
88th percentile
Standby power20 kW
Low 15 kWAverage 20.8 kWHigh 27 kW

About 4% below the similar-output Generac average. Around the 44th percentile for this field.

Dry weight1,224 lb
Low 419 lbAverage 873 lbHigh 2,176 lb

About 40% above the similar-output Generac average. Around the 75th percentile for this field.

Sound level70 dBA
Low 55 dBAAverage 65.7 dBAHigh 72 dBA

About 7% above the similar-output Generac average. Around the 88th percentile for this field.

Oil capacity1.72 gal
Low 0.47 galAverage 0.96 galHigh 2.8 gal

About 79% above the similar-output Generac average. Around the 88th percentile for this field.

This model Peer average

Generator information

Manufacturer Generac
Model RD020
Generator type Generator
Fuel diesel
Frequency 60 Hz

Electrical output

Standby power 20 kW
Prime power 16 kW
Voltage options 120/240 V, 120/208 V
Phase Single phase / Three phase
Rated current 70 / 60 / 50 A
Power factor 1.0 / 0.8

Engine, cooling and controls

Oil capacity 1.72 gal (6.5 L)
Coolant capacity 3.01 gal (11.4 L)
Maximum ambient 122 °F (50 °C)
Controller Digital Evolution, Evolution, Off modes

Physical specifications

Dry weight 1, 224 lb (555 kg)
Dimensions (L × W × H) 62.2 × 30.7 × 48.8 in (1580 × 780 × 1240 mm)
Sound level 70 dBA @ 23 ft (7 m)

Battery

Battery group 27F
Battery cranking 700 CCA
Battery voltage 12 V

Fuel system and runtime

Fuel tank 45 gal (170.3 L)
Tank runtime 38.8 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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