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Generac Protector Series 48kW Automatic Standby Generator, 277/480VAC, 3-Phase, Natural Gas/LP

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SKU
RG04845KNAX

The Generac Protector Series RG04845KNAX is a 48 kW automatic standby generator with 277/480 VAC three-phase output and a listed amperage of 72 A. It uses natural gas or liquid propane and has a liquid-cooled engine in a corrosion-resistant aluminum outdoor enclosure.

  • 48 kW Running Output
  • 277/480 VAC Three-Phase Output
  • 72 A Current Rating
  • Natural Gas or LP Fuel
  • Liquid-Cooled Engine
  • Corrosion-Resistant Aluminum Enclosure

Product Overview

The Generac Protector Series RG04845KNAX is a 48 kW automatic standby generator with 277/480 VAC three-phase output and a listed amperage of 72 A. It uses natural gas or liquid propane and has a liquid-cooled engine in a corrosion-resistant aluminum outdoor enclosure.

Technical Specifications

Product information and specifications for the selected item.

SKU: RG04845KNAX

Product Information

BrandGenerac
MPNRG04845KNAX
SKURG04845KNAX
UPC / GTIN696471078411
CategoryCommercial Standby Generators

Key Specs

Running Wattage48000 W
Amperage (A)72
Output Voltage277/480 VAC
Electrical Phases3
Fuel TypeLiquid Propane, Natural Gas
LP Power Capacity48000

Generator Output

Running Wattage48000 W
Amperage (A)72
Output Voltage277/480 VAC
Electrical Phases3
Altitude derating3% per 1,000 ft above 600 ft (1% per 100 m above 183 m)
Maximum 24-hour average output70 % of ESP rating
Rated frequency60 Hz
Temperature derating1.7% per 10 °F above 77 °F (1.5% per 5 °C above 25 °C)
Alternator typeSynchronous

Fuel Capacity

Fuel TypeLiquid Propane, Natural Gas
LP Power Capacity48000
NG Power Capacity48000
NG fuel consumption at 100% load607 (17.2) cfh (m³/h)
LP fuel consumption at 100% load6.6 (25.0) US gph (L/h)
LP supply methodVapor withdrawal only
Required fuel pressureLP: 7–14 (1.74–3.48); NG: 3.5–14 (0.87–3.48) in water column (kPa)

Engine & Cooling

Engine BrandGenerac
Cooling TypeLiquid Cooled
RPM1800 rpm
Engine displacement4.43 L
Exhaust flow at rated output104 (2.9) cfm (m³/min)
Compression ratio9.9:1
Coolant system capacity2.9 (11) US gal (L)
Engine configuration4.5 L inline 4-cylinder, naturally aspirated
Maximum ambient air temperature122 (50) °F (°C)

Features & Connections

Generator FeaturesAutomatic Voltage Regulation, Low Oil Alert/Shutdown
FeaturesEPA Compliant
Approved for Commercial UseYes
Fuel line connection1-1/4 female tee through baseframe opening in. NPT
Enclosure materialCorrosion-resistant aluminum enclosure
Wind speed rating115 (185) mph (km/h)
Safety listingUL 2200 listed
Enclosure colorBisque
Sound level at exercise speed68 dB(A) at 23 ft (7 m)
Emissions certificationEPA emissions certified

Dimensions & Weight

Height (in.)46
Width (in.)35
Length (in.)83.4
Weight (lb.)1781
SwRI-listed structure clearanceAs close as 18 (457) from structure in (mm)
Minimum recommended concrete pad size47 wide × 95.4 long in

Product Documents

  • Generac Power Systems 5 Year (5M) Limited Warranty for Standby Generators Warranty Open / download file
  • Owner’s Manual — Spark-Ignited Stationary Generators, Residential and Commercial, 48/60/80 kW 4.5L (A0000253468) Manual Open / download file
  • Installation Guidelines — Spark-Ignited Stationary Generators, Protector Series 48/60/80 kW (A0000253470) Installation manual Open / download file
  • RG Protector® Series Standby Generators — Liquid-Cooled Gaseous Engine Spec Sheet (48/60/80 kW) Spec sheet Open / download file

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