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Home Generators Commercial Generators 48 kW Generac Protector Series 277/480V Generator 3-Phase Natural Gas or Propane | RG04845KNAX
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48 kW Generac Protector Series 277/480V Generator 3-Phase Natural Gas or Propane | RG04845KNAX

1 review

$12,925.00

  • 48 kW Generac Protector Series 480V Generator 3-Phase RG04845KNAX
  • Made in the USA.
  • Utility-Grade True Power Technology with Less than 5% THD
  • Smart User-Friendly Evolution Controller with LCD Display
  • Quiet-Test Low-Speed Programmable Self-Test
  • Mobile Link Connectivity—Monitor Generator Status from Anywhere
  • Durable RhinoCoat All Aluminum Enclosure
  • Generac 5-Year Limited Warranty—Extended Warranty Available
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Category: Commercial Generators
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Description

48 kW Generac 480V 3 Phase Generator

The 48kW Generac 480V Generator offers best-in-class backup power for small to medium business and agricultural operations. The 3-phase 277/480-volt generator with True Power Technology provides clean, smooth power of the same or better quality as most electric utilities with less than 5% Total Harmonic Distortion (THD.)

Generac’s 48kW RG04845KNAX standby generator powers office equipment, air conditioning, appliances, and large or small motor driven equipment with all the power needed to stay open and continue work without interruption. With a Protector Series 480V Generator, closing your doors or stopping work during power outages becomes a thing of the past.

Note: National Fire Protection Association article 37 (National Building Code) for the installation of Internal Combustion Engines requires a minimum 3-foot clearance between a building and this generator, and 5-feet to the nearest vent, window, door, or other opening. Check with your local building code authority for additional placement and/or installation requirements.

Generac 480V 3 Phase Generator

Generac designs and manufactures the Generac 48kW Generator in Wisconsin. They staff their Customer Care center located near their Waukesha, Wisconsin headquarters 24 hours a day, seven days a week, 365 days a year. Trained and knowledgeable staff answer questions any time of the day or night.

They designed and built their purpose built 4.5L Generac 4-Cylinder in their facilities located in Wisconsin, USA. Featuring first-in-class dual-valve, ultra-low-pressure fuel delivery and intelligent engine controls for more than one hundred performance functions, the Generac RG04845KNAX offer peak efficiency through all temperature ranges and elevations.

True Power Technology ensures utility-grade power. Safe for sensitive electronics—runs appliances and lights—powers heavy duty motors on air conditioners, pumps and shop equipment. All at the same time. Isochronous Frequency regulation within 0.25%, automatic digital voltage regulation to 1%, and less than 5% total harmonic distortion.

The Evolution Controller with LCD display is smart, user-friendly, and viewable without opening the generator cabinet. Monitor generator performance, review status logs, and track maintenance to keep your 480V Generator in top condition and ready for the next power outage.

Generac’s proprietary Quiet-Test self-test mode runs the generator at a lower speed during a five or twelve-minute self-test while it performs diagnostics and exercises the generator. Program regular exercise at weekly, bi-weekly, or monthly intervals to ensure the generator is always ready to protect your home or business from an outage.

Wireless Mobile-Link comes standard on Protector Series Generators. Access the 48kW Generator controller from anywhere in the world on any mobile device, laptop, or desktop computer. The optional Mobile-Link 4G LTE (sold separately) utilizes the cellular network for reliable communications during outages and natural disasters.

Inside, a durable protective coating prevents rust on the RG04845KNAX 480V Generator frame. Outside, the Rhino-Coat Powder-coated finish on the aluminum cabinet forms a corrosion resistant barrier under the harshest environmental conditions.

The Generac Protector Series Standby Generators come with a standard 5-year limited consumer warranty. Norwall offers extended warranty options on the Generac Protector Generators.

Generac 48kW Generator

The 480V 3 Phase Generator with its small footprint and neutral color blends into the local landscape. Perfect for tight spaces in yards or any commercial location.

The New RG04845KNAX 48kW 480V Generator replaces the RG04854KNAX Standby with updated features and controls and a new Generac purpose-built engine designed specifically for the demanding needs of a standby generator system.

Requires a 12-Volt Group 27F 725 Cold Cranking Amp (CCA) battery, not included and available locally at automotive supply stores, home centers, agricultural supply, and department store retailers.

Product Specifications

Model

Model Number; RG04845KNAX

Manufacturer; Generac Power Systems

Made In USA; Yes

Rated Watts; 48kW

Rated Amps; 72

Surge Amps; 122.8

Voltage; 277/480 Volts 3 Phase

A/C Ton Rating; 5 Ton and Higher

Enclosure; Aluminum Enclosure with Rhino-Coat Finish

UL Listed; UL2200

Decibel Rating; 70 dBA

Type; Standby Generator

Series Name; Protector Gas

Features

Starting System; Automatic

Low Oil Alert; Low Oil Shutdown

Mainline Breaker; 80 Amperes

Battery Requirement; 12-Volt Group 27F 725 CCA

Weight; 1781

Dimensions; 83.4 x 35 x 46

Warranty Information

Consumer Warranty; Generac 5-Year Limited Warranty

Commercial Warranty; Generac 5-Year Limited Warranty

Engine

Engine Brand; Generac

Engine Size; 4.5 Liter Inline 4 Cylinder

Engine RPM; 1800

Cooling System; Liquid Cooled

Alternator

Alternator Type; Heavy Duty Revolving Field

Frequency; 60 Hz

Auto Voltage Regulation; Digital Voltage Regulation to ± 1%

Fuel

Fuel Type; Natural Gas (NG) or Propane (LP)

Fuel Gauge; No

NG Power Capacity; 48kW

LP Power Capacity; 48kW

NG Consumption @ Full Load; 604 cubic-feet per hour

NG Consumption @ Half Load; 336 cubic-feet per hour

LP Consumption @ Full Load; 6.61 gallons per hour

LP Consumption @ Half Load; 4.16 gallons per hour

Shipping & Delivery
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Effective Date: August 9, 2025

At X Factors Motorsports, we are committed to delivering your order quickly, securely, and affordably.


1. Processing Time

  • Orders are typically processed within 1–2 business days after payment is confirmed.

  • Orders placed on weekends or holidays will be processed on the next business day.


2. Delivery Times

  • Domestic Shipping (United States): Delivery takes 5–7 business days from the date of shipment.

  • International Shipping: Delivery times vary by destination and may take 7–21 business days depending on customs processing and local delivery services.


3. Shipping Rates

  • United States: Free standard shipping on all orders.

  • International: Shipping costs are calculated at checkout based on the delivery address, package weight, and destination country.


4. Carriers Used

We ship orders using trusted carriers such as UPS, FedEx, USPS, and DHL to ensure reliable delivery. Tracking numbers are provided for all shipments.

Customer Reviews

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A
Angel
Strong Backup Power for Our Building

We installed the Generac Protector 48kW for our small commercial building, and it’s been performing very well. It kicks on smoothly during outages, handles the load without a problem, and gives us peace of mind knowing operations won’t be interrupted. Running it on natural gas has been convenient, and fuel efficiency seems reasonable for the size.
The unit itself is pretty big and definitely not the quietest, but that’s expected with something this powerful. Overall, it’s been a reliable investment and does exactly what we need it to.

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