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Generac SG275 Generator Set

The Generac SG275 is a 275 kW (344 kVA) Natural Gas standby generator set powered by a Generac SG275 engine. It is available at 120/208 V, 120/240 V, 277/480 V and 346/600 V, 3-phase, 60 Hz and rated 955 A. It holds about 34.3 L (9.1 gal) of oil and 71.9 L (19.0 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 12 group-2 batteries rated 1000 CCA at 12 V. The set measures 3524.1×1463.1×1728.3 mm (138.7×57.6×68.0 in), weighs about 2998 kg (6609 lb) and produces 90 dBA at 23 m.

275 kW
Standby
12.88 L
Displacement
34.3 L
Oil capacity
3
Document types

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Service parts for the SG275

Grouped by system, with how many of each the parts manual calls for.

Oil system

1 required
0161970SBYOilsee priceAmazon

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Specifications

FuelNatural Gas
Frequency60.0 Hz
Standby power275 kW
Standby kVA344
Prime power248 kW
EmissionsEPA Certified
ControllerDigital H Control Panel - Dual 4x20 Display
Oil capacity34.3 L
Alternator520
Voltage options120/208 V, 120/240 V, 277/480 V, 346/600 V
PhaseThree-Phase
Rated current955 A
Power factor0.8
Battery group2
Battery cranking1000 CCA
Battery voltage12 V
Battery quantity12
Coolant capacity71.9 L
Max ambient50 °C
Dimensions (L×W×H)3524×1463×1728 mm
Dry weight2998 kg
Sound level90.0 dBA @ 23 m
Fuel tank0.0 L
Tank runtime0 hr

Engine

Generac SG275
Oil capacity34.3 L
Coolant capacity71.9 L
Displacement12.88 L
AspirationTurbocharged/Aftercooled
Rated speed2150 rpm

Maintenance & consumables

for the Generac SG275
ItemSpecCapacityPart #Interval
Air filterAir Cleaner—
Fuel filterFuel Type—
Oil filterOil Filter Type—
BatteryBattery Size—
BeltFan Type—
OilCrankcase Capacity34.3 L0161970SBY Amazon eBay
Spark plugIgnition—

Common questions

What size generator is the Generac SG275?

The Generac SG275 is rated 275 kW standby (344.0 kVA).

Which engine powers the Generac SG275?

The Generac SG275 is powered by the Generac SG275 engine.

What fuel does the Generac SG275 use?

The Generac SG275 runs on Natural Gas.

What's the oil capacity on a Generac SG275?

The Generac SG275 engine in the Generac SG275 has an oil capacity of 34.3 liters.

What alternator comes on the Generac SG275?

The Generac SG275 uses a 520 alternator.

Fuel consumption

RatingLoadL/hgal/h
Standby25%189.2750.0
Standby50%276.3473.0
Standby75%348.2692.0
Standby100%442.89117.0

Available documents

Spec sheet — 0l0031-sg275-rev-a (Generac)Reference — 0172640SBY (Generac)Parts manual — 0k4298-b-sg275-12-9l-60hz-1 (Generac)