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Generac Protector Series RG15090 150 kW Natural Gas Standby Generator

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SKU
RG15090JNAC

The Generac Protector Series RG15090JNAC is a 150 kW natural-gas standby generator approved for commercial use. It provides 120/240 VAC three-phase output at 451 A and uses a liquid-cooled 9.0 L turbocharged, aftercooled V-8 engine in an aluminum enclosure. An automatic transfer switch is not included.

  • 150 kW, 120/240 VAC, 3-Phase Output
  • 451 A Output Current
  • Natural Gas Fuel
  • Automatic Transfer Switch Not Included
  • Liquid-Cooled 9.0 L V-8 Engine
  • Corrosion-Resistant Aluminum Enclosure

Product Overview

The Generac Protector Series RG15090JNAC is a 150 kW natural-gas standby generator approved for commercial use. It provides 120/240 VAC three-phase output at 451 A and uses a liquid-cooled 9.0 L turbocharged, aftercooled V-8 engine in an aluminum enclosure. An automatic transfer switch is not included.

Technical Specifications

Product information and specifications for the selected item.

SKU: RG15090JNAC

Product Information

BrandGenerac
MPNRG15090JNAC
SKURG15090JNAC
CategoryCommercial Standby Generators

Key Specs

Running Wattage150000 W
Amperage (A)451
Output Voltage120/240 VAC
Electrical Phases3
Fuel TypeNatural Gas

Generator Output

Running Wattage150000 W
Amperage (A)451
Output Voltage120/240 VAC
Electrical Phases3
Alternator design and insulationSynchronous alternator; Class H stator insulation; synchronous brushless excitation
Altitude derate2.1% per 1,000 ft above 600 ft (0.7% per 100 m above 183 m) % per elevation increase
Rated frequency60 Hz
Emergency standby duty limitAverage output over 24 hours must not exceed 70% of the ESP rating % of ESP rating per 24 h
Voltage regulationDigital regulation with ±1% regulation

Fuel Capacity

Fuel TypeNatural Gas
NG Power Capacity150
Natural gas supply pressure7–11 (1.74–2.74) in. H₂O (kPa)
Natural gas temperature derate16% per 10 °F above 77 °F (14.4% per 5 °C above 25 °C) % per temperature rise
Fuel conversionFuel configuration is factory-set and not field-convertible between natural gas and propane
Natural gas consumption at full load1,769 (50.1) at 100% rated load CFH (m³/h)

Engine & Cooling

Engine BrandGenerac
Cooling TypeLiquid Cooled
RPM1800 rpm
Governor regulationElectronic governor; isochronous frequency regulation; ±0.25% steady-state regulation
Maximum ambient air temperature122 (50) °F (°C)
Crankcase capacity10.5 (9.9) qt (L)
Coolant mixture50/50 mixture with 50% ethylene glycol
Exhaust flow at rated output1,200 (34.0) CFM (m³/min)
Coolant system capacity6.3 (24) US gal (L)
Engine configuration9 L, V-type 8-cylinder, turbocharged and aftercooled

Features & Connections

Generator FeaturesAutomatic Voltage Regulation, Hour Meter, Low Oil Alert/Shutdown
FeaturesApproved for Commercial Use, CARB approved, EPA Compliant, Made in America
Approved for Commercial UseYes
Natural gas inlet connection2-in female coupling through the base frame NPT
Mounting hardware5/8-11 Grade 5 bolts or studs; use standard SAE torque specifications
Electrical stub-up opening536 × 350 mm (21.1 × 13.8 in) open area mm (in)
Recommended batteryGroup 31; 925 CCA minimum
Emissions and safety listingsEPA emissions certified; CA and MA exhaust-emission compliant; UL 2200 listed
Sound level80 at 23 ft (7 m), operating speed and no load dB(A)
Enclosure material and finishCorrosion-resistant aluminum enclosure with RhinoCoat powder-coated finish

Dimensions & Weight

Height (in.)68.1
Width (in.)50.5
Length (in.)110
Weight (lb.)3278
Recommended concrete pad sizeMinimum recommended: 62 in wide × 129 in long (1554 × 3265 mm); 6 in larger per side than the frame in (mm)

Product Documents

  • 130–150 kW 60 Hz Protector Series — Automatic Standby Gaseous Generator Brochure (Rev. 08/2023) Other Open / download file
  • G9.0L G26 150 kW CPL — Installation Layout and Stub-Up View (A0001618957, Rev. D) Drawing photometric Open / download file
  • Generac Power Systems 5 Year (5M) Limited Warranty for Residential and Commercial Standby Generators Warranty Open / download file
  • Owner’s Manual: Spark-Ignited Stationary Generators, Residential and Commercial (A0001525188, Rev. E, 01/29/2025) Manual Open / download file
  • Installation Guidelines for Spark-Ignited Stationary Generators — Protector Series 100/130/150 kW (A0001525181, Rev. A, 08/09/2021) Installation manual Open / download file
  • Protector® Series 130–150 kW Standby Generators — Specification Sheet (A0002505135) Spec sheet Open / download file

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