Generac QuietSource 48kW 5.4L (Alum-CA Emission) NG/LP 240V Single Phase
Generac Power Systems

Generac makes it easy to configure a standby backup power system for your home or business needs. The 48kW liquid-cooled generator is capable of providing standby backup protection for large homes and commercial applications, designed specifically for high demand power generation needs.

Powerful low-speed, liquid cooled engine is engineered to run at only 1800 rpm for a substantially quieter generator, consuming less fuel and giving both the engine and alternator a longer life.

Generac's Nexus Controller is the most comprehensive available. The dual line, tri-lingual LCD display allows for easy monitoring and management of generator functions.

Quiet-Test mode for a weekly self-test that runs quieter than other brands. Patented, programmable feature validates proper operation. Runs at lower RPM for reduced noise, less fuel consumption, and fewer emissions.

Standard aluminum, all-weather enclosure provides the ultimate protection from the elements. Aluminum’s corrosion resistance prolongs the life of your generator and is recommended for salt-air, coastal locations.

Clean burning, continuous fuel choice of LP or natural gas.

Neutral styling, color and small footprint fits unobtrusively into landscaping.

Features of the Nexus Controller:
• LCD Display
• Remote Maintenance LED's
• Time & Date
• Alarm Log
• Run Log
• Set Exercise via Display
• Engine Hour Display
• RPM Display & Sensor Loss Alarm
• Frequency
• Battery Voltage Display
• Trilingual Display
• Underspeed/fail to Transfer Alarm
• High Engine Temperature Alarm
• Low Oil Pressure Alarm
• Overcrank Alarm
• Overspeed Alarm
• Maintenance Scheduling

-California Emissions Compliant


Generac QuietSource 48kW 5.4L (Alum-CA Emission) NG/LP 240V Single Phase

Generac Power Systems Model #QT04854ANAC
This product is no longer available for purchase.
To see the product that replaced this model or one
similar in specifications click on the button below.
Country Living
Comment by Jim C. on 9th Nov 2014

My Mom and Dad are both in their 80's and live in the country. With the installation of the 6551 I can rest assured that they will never be without power, heat, ac and water. this is a great unit and worked perfectly upon startup. Should have installed this a lot sooner for them.

By the way, my son-in-law also has one for his home. I live in a motorhome or I would have one also.

Read More Customer Reviews