Overview#
The Generac SG175 is a 175 kW standby (158 kW prime) demand response ready industrial natural gas generator set powered by Generac's 14.2L inline-6 turbocharged and aftercooled spark-ignited engine. Rated at 219 kVA standby and 198 kVA prime at 60 Hz, it is EPA certified for both stationary emergency and non-emergency applications. The genset features the Generac Power Zone Pro Sync controller with a 7-inch color touchscreen display, Modbus RTU/TCP/IP, and Ethernet communications.
Engine and alternator#
The Generac 14.2L (864 cubic inch) inline-6 turbocharged/aftercooled engine delivers 175 kW standby at 1,800 RPM. The engine has a 9.5:1 compression ratio, ductile iron crankshaft and cylinder liners, cast iron cylinder head, 7 main bearings, solid lifters, and high-temperature steel alloy exhaust valves with hardened valve seats. The electrical system uses 24V DC (dual 12V batteries), a step up from the 12V system used on the smaller SG-series models. Oil capacity is 36.2 quarts (34.3 L).
The standard alternator is the Generac K0200124Y21, a 4-pole revolving-field design with Class H insulation on both rotor and stator. It features permanent magnet excitation, full digital voltage regulation with plus or minus 0.25% steady-state accuracy, and total harmonic distortion below 5%.
Power ratings and fuel consumption#
At 277/480V three-phase and 0.8 power factor, the SG175 delivers 175 kW standby / 158 kW prime. The unit supports single-phase and three-phase configurations across 120/208V, 120/240V, 277/480V, and 346/600V.
Natural gas consumption at standby/demand response ratings: 2,400 scfh at 100% load, 1,980 scfh at 75%, 1,440 scfh at 50%, and 900 scfh at 25% load.
Physical dimensions#
The open set measures 128.0 x 52.9 x 62.3 inches, weighing 5,281 lbs. Weather protected enclosure and Level 1, 2, and 3 sound attenuated enclosure options are available.
Our service experience#
The SG175 marks the transition from the 9.0L V8 platform to the 14.2L inline-6 platform — a significant step up in displacement, physical footprint, and system voltage (24V DC electrical vs 12V on the smaller models). Exhaust temperature at 1,350 degrees F is lower than the peak 9.0L V8 output (1,440 degrees F on the SG150), reflecting the larger displacement operating at lower BMEP. The Power Zone Pro Sync controller supports parallel generator operation, making this model well-suited to paralleled installations for campus and data center applications. The 36.2-quart oil capacity requires an oil service plan that accounts for this large crankcase volume.
