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Generac SG150 Specs (Power | Voltage | Weight)

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

The Generac SG150 compressor is listed with standby output of 150 kW, propane fuel, 60 Hz operation, 120/240 V, 120/208 V, 277/480 V, 600 V output, Single phase / Three phase, rated current of 600 / 521 / 452 / 226 / 181 A, and sound level of 81.1 dBA @ 23 ft (7 m).

Generac Generator Specifications

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

Standby power: 150 kWVoltage: 120/240 V, 120/208 V, 277/480 V, 600 VRated current: 600 / 521 / 452 / 226 / 181 ADry weight: 2,948 lb (1,337 kg)

Key specifications

150 kWStandby power
propaneFuel
120/240 V, 120/208 V, 277/480 V, 600 VVoltage
Single phase / Three phasePhase
600 / 521 / 452 / 226 / 181 ARated current
2,948 lb (1,337 kg)Dry weight
81.1 dBA @ 23 ft (7 m)Sound level
60 HzFrequency

Visual model specs

Built only from this model’s supplied generator specifications.

Power output
Low 135 kW High 150 kW
Standby

150 kW

Prime

135 kW

Fluid capacities
Low 6.34 gal High 9.06 gal
Oil

9.06 gal

Coolant

6.34 gal

Model spec snapshot
Representative numeric specifications from this generator.
150 kWStandby
2,947.58 lbWeight
81.1 dBASound

How the Generac SG150 compares

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

Standby power
150 kW
41% below avg
8th percentile
Dry weight
2,948 lb
57% below avg
5th percentile
Sound level
81.1 dBA
In line with avg
45th percentile
Oil capacity
9.06 gal
21% above avg
82nd percentile
Standby power150 kW
Low 150 kWAverage 255.7 kWHigh 375 kW

About 41% below the similar-output Generac average. Around the 8th percentile for this field.

Dry weight2,948 lb
Low 2,844 lbAverage 6,845 lbHigh 12,362 lb

About 57% below the similar-output Generac average. Around the 5th percentile for this field.

Sound level81.1 dBA
Low 68 dBAAverage 81 dBAHigh 93 dBA

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

Oil capacity9.06 gal
Low 1.25 galAverage 7.51 galHigh 9.51 gal

About 21% above the similar-output Generac average. Around the 82nd percentile for this field.

This model Peer average

Generator information

Manufacturer Generac
Model SG150
Generator type Generator
Fuel propane
Frequency 60 Hz

Electrical output

Standby power 150 kW
Prime power 135 kW
Standby kVA 188.0
Voltage options 120/240 V, 120/208 V, 277/480 V, 600 V
Phase Single phase / Three phase
Rated current 600 / 521 / 452 / 226 / 181 A
Power factor 0.8

Engine, cooling and controls

Oil capacity 9.06 gal (34.3 L)
Coolant capacity 6.34 gal (24 L)
Maximum ambient 122 °F (50 °C)
Controller H-100, H100 Digital, Power Zone Pro Sync
Alternator K0150124Y21 (4-pole, Class H insulation)
Emissions EPA

Physical specifications

Dry weight 2, 948 lb (1, 337 kg)
Dimensions (L × W × H) 116.5 × 49.7 × 55.6 in (2960 × 1262 × 1413 mm)
Sound level 81.1 dBA @ 23 ft (7 m)

Battery

Battery group 8D
Battery cranking 1155 CCA
Battery voltage 12 VDC V
Battery quantity 2

Fuel system and runtime

Fuel tank 488.7 gal (1, 850 L)
Tank runtime 52 / 40 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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