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Generac QuietSource Series™ 36 kW Standby Power Generator (Premium-Grade)

Generac QuietSource Electric Generators and Accessories
Model: QT03624ANAX
(Based on expert analysis, manufacturer ratings and customer reviews)
4.6 out of 54.6 out of 54.6 out of 54.6 out of 54.6 out of 5
5 Reviews
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  • Features
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Run Watts
Rated Watts
Surge Watts
Starting Watts
Premium-Grade Standby Generator
High-quality, liquid-cooled standby generator
Designed for luxury homes and commercial buildings

Low-speed exercise mode for quieter weekly tests
Exercises at a quiet 58 decibels at 23 feet
Sound level comparable to an idling car

Automotive-Style Liquid-Cooled Engine

Turbocharged/Aftercooled Gaseous Fueled 2.4L Engine
Operates at half the speed of other engines (1800 vs. 3600 RPM)
Runs at a quiet 64 decibels at 23 feet under load

Aluminum Enclosure
Corrosion-resistant material ideal for salty air conditions
Sound attenuated acoustically designed enclosure

Tri-Lingual Digital Nexus™ Controller
Two-Line LCD Display provides service & maintenance intervals

Automatic Shutdown
High coolant temp, low coolant, low oil pressure and overspeed

Transfer Switch (Sold Separately)

Fork Lift or Loading Dock is Required for Delivery
Engine Brand
Generac 2.4L 4-Cylinder
Consumer Engine Warranty
2 Years
Commercial Engine Warranty
2 Years
Engine RPM
1800 RPM
Low Oil Alert/Shutdown
Product Specs
120/240 Single-Phase
60 Hertz
Surge Watts
36000 Watts
Rated Watts
36000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
35000 Watts
LP Power Capacity
36000 Watts
NG Fuel Consumption @ 50% Load
282 (BTU: 282,000 BTU/HR) ft³/hr
NG Fuel Consumption @ 100% Load
503 (BTU: 503,000 BTU/HR) ft³/hr
LP Fuel Consumption @ 50% Load
3 (BTU: 272,250 BTU/HR) gallons/hr
LP Fuel Consumption @ 100% Load
5.5 (BTU: 499,125 BTU/HR) gallons/hr
Rated Amps
150 @ 240 Volts (Single Phase) Amps
Decibel Rating @ 7m
58 Test (64 Run) dbA
Transfer Switch
Automatic (Not Included)
Not Included (525 CCA)
Mounting Pad
Concrete (Not Included)
Cooling System
Liquid Cooled
UL Listed
Grade Type
Made in USA
1271 Pounds
Product Style
Standby Generator
Product Length
77 Inches
Product Width
34 Inches
Product Height
45 Inches
Consumer Warranty
2 Years
Commercial Warranty
2 Years
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How To Library
  5 Questions
Q: Several questions actually. Looking at whole house generators. I have 400 amp service and want to power entire house. LP is my preferred option. What size LP tank is recommended for a 38 kw? Next, Automatic Transfer Switches with Service disconnect, I know that I need this as well, but what about a Load Control Module as well? Do they work with each other or are they performing the same function?
by Michael Mcnulty from Virginia on December 13, 2013

A: The Generac 36kW unit uses 5.5 Gal/HR at full load and 3.0 Gal/Hr at half load. Based on half load use you would use 72 gallons in a 24 hour time period. So depending on how much backup time you require would determine the tank size along with the ambient temperature in your area.

A 1000 gallon tank has 600 usable gallons with the BTU output varying depending on temperature. A 1000 Gallon tank BTU/HR output capacity based on 40 degrees F is 1,416,960 BTU/HR and a 36kW, at start-up, requires 500,00 BTU/HR and a tanks BTU content when the temperature is at 0 degrees F is 472,320 BTU/HR. To properly size a generator to your fuel source you need to size it to it full load start-up BTU/HR requirements.

The matching whole house transfer switch would need to be rated at 400A to match your incoming service with the recommended model being RTSY400A3......

Link - Model RTSY400A3

The transfer switch comes ready to handle 2 AC unit without any additional hardware. However, you can do up to 4 more large loads with the use of the Load Control Modules (PMM). The first PMM needs to be model 6199 which includes the 24V DC starting kit (required) and then the other 3 can be model 6186.....

Link - Model 6199

Link - Model 6186

by Mike, Product Expert

Q: What size gas line do I need to install this unit? I am building a house and want to prepare for this generator.
by Jake Z. from Texas on November 07, 2013

A: Pipe sizing is based on the distance from the fuel source.....

QT03624ANAX Requirements:

Natural Gas (NG):

3/4 Inch: Cannot Use
1 Inch: Cannot Use
1-1/4 Inch: Max Distance 35 Feet
1-1/2 Inch: Max Distance 95 Feet
2 Inch: Max Distance 370 Feet

Liquid Propane Vapor (LP):

3/4 Inch: Cannot Use
1 Inch: Max Distance 20 Feet
1-1/4 Inch: Max Distance 125 Feet
1-1/2 Inch: Max Distance 290 Feet
2 Inch: Max Distance 1030 Feet

Add 2.5ft per any bend, tee or angle in the pipe to the overall distance.

Gas Pipe sizing is one of the most commonly made mistakes. A properly sized gas pipe is critical to the proper operation of the generator. The generator inlet size has no bearing on the proper gas pipe size.

by Mike, Product Expert

Q: I'm going to build a house in the spring of 2013 and I want to have a standby generator installed when the house is built.

What would be the best size generator? I plan on having a geothermal heating/ac system and the house will be all electric.

by Dan from Kansas on August 06, 2012

A: Thank you for visiting Electric Generators Direct. In regards to your question, the generator size is determined by the starting amperage load of the equipment you are planning on powering when you lose power.

The starting amperage load will be much larger than the running load and proper calculations need to be done to properly size a unit.

We recommend having a certified electrician do your wattage calculations as every home is different.

The electrician would calculate with the following formula to properly size the generator which should be sized at 80% of its running capacity to allow enough flexibility to handle large intermittent loads and still keep voltage output at proper levels.

(Starting Amps x Volts = Watts)

Note: Geo-Thermal systems can require a tremendous amount of starting current and all calculations should be done onsite professionally.

by Mike, Product Expert

Q: I am looking at the Generac QuietSource Series™ 36 kW Standby Power Generator (Premium-Grade)

What's installation going to run me?


by Randy Meyers from Maryland on June 30, 2012

A: Unfortunately we do not work directly with installers so we do not know what the pricing could be. I can also be determined by your specific installation needs and what your local code requirements are.

With these systems it is best to have a Generac installer and you can find one from the following link....also try to get a minimum of 3 quotes due to the ever changing installation prices.

Dealer Locator

by Mike, Product Expert

Q: When the generator runs on the time you set once a week, does it actually transfer power to your house or does it just run with out transferring power?
by R. SMITH from Louisiana on February 10, 2011

A: The unit is just going to exercise without load. This would not transfer any power to the house on the exercise cycle.
by Mike, Product Expert

Generac QuietSource QT03624ANAX Reviews & Ratings
Overall Rating
4.6 out of 54.6 out of 54.6 out of 54.6 out of 54.6 out of 5
Price (3)
Quiet (3)
Easy To Use (3)
High Quality (1)
Features (1)
No Tech Support (1)
Bad Instructions (1)
Heavy (1)
100% of respondents would recommend this product to a friend
5 Reviews  Sort by 
James C.
Moneta, VA
Purchased from Electric Generators Direct
Purchased 6/5/13
Total Helpful Votes
44 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
I own a 45kw Generac at my home in Florida. This 36kw is for my summer home on Smith Mt. Lake, Va. My Generac @ my Florida house is seven years old and doesn't have the aluminum housing or the 1800 rpm engine.

I really like how quiet this new Generac is during exercise you can barely hear it standing on the upper deck.
Pros: Features, Easy To Use, Quiet, Price
James Recommends This Generac QuietSource Product
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James C.
Kings Park, NY
Purchased from Electric Generators Direct
Purchased 12/3/12
Total Reviews
2 Reviews
Total Helpful Votes
36 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Was This Part Needed?
I purchased a 36KW Generac Quietsource and the wireless monitor from EGD.

I also bought this adapter harness, but could not figure out where to connect it. The documentation was not clear, the photos of the genset were not similar to my 36KW, and the plug that was shown in one photo does not match up to the harness.

I was able to easily plug in the wireless monitor with the cable that came with it. It easily reached from the Nexus controller to the knockout on the side of the genset... more
Mike, the Generator Expert
Product Expert
We appreciate your input, and we'll update the web site with our findings!
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James S.
Little Rock, AR
Purchased from Electric Generators Direct
Purchased 7/21/14
5 out of 55 out of 55 out of 55 out of 55 out of 5
Strong And Quiet
Got this unit to replace on older version that salt air from Key West had destroyed. Much nicer built than the older units, but everything other than the fuel line was in the same place as the older unit. That made installation easy. Started right up the first time. Even with the cover off it is very quite. With the covers in place it's hardly heard from 20 feet away. Can carry on a conversation standing right next to it. Will have to see how the new cabinet holds up to the Key's air.
Pros: Easy To Use, Quiet, Price, High Quality
Cons: Heavy
James Recommends This Generac QuietSource Product
James's Experience With Electric Generators Direct
Web Site


"Good buying. Ordered it and had it delivered to a different location other than the billing location. A remote location at that. No problems getting it shipped and only cost $50 to have it shipped there for a 1500lbs package is great. Will buy again."
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Dwight B.
Lakewood, CO
Purchased from Electric Generators Direct
Purchased 11/29/14
Total Reviews
2 Reviews
3 out of 53 out of 53 out of 53 out of 53 out of 5
Mixed Messages.......
Dealing with Electric Generators Direct was a breeze. Ordering and delivery went smooth. The freight tracking is a bit lacking, but I deal with a lot of freight and figured it out. So EGD gets 5 stars.

The generator itself seems like a good piece of equipment. Time will tell. It looks well made, sturdy, etc.
3 Stars for a new unit, not time tested.

The documentation for the generator is VERY poor. If you are not technical, you will most likely have problems setting up this unit. ... more
Pros: Easy To Use, Price, Quiet
Cons: Bad Instructions, No Tech Support
Dwight Recommends This Generac QuietSource Product
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Kenneth C.
Lincoln, RI
Purchased from Electric Generators Direct
Purchased 7/23/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Customer Service & Delivery
Ordering from Electric Generators Direct was a breeze. Great price, great product. Excellent customer service and delivery was right on time.

Have not had the opportunity to have to use the generator just yet....but that's a good thing right? But I know it will be ready and waiting to kick-in as soon as it's needed.
Kenneth Recommends This Generac QuietSource Product
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Shop for the Generac QuietSource Series™ 36 kW Standby Power Generator (Premium-Grade) at Electric Generators Direct. Research Generac QuietSource 696471607772 standby generators liquid-cooled generator online. Find Generac QuietSource QT03624ANAX standby generators liquid-cooled generator & 36 kilowatt 120/240 volt generator features and specifications.