cummins 20kw generator vs generac 22kw


As a product reviewer, I had the opportunity to test and compare two top-rated generators: the Cummins 20KW generator and the Generac 22KW generator. Both of these generators are produced by reputable brands and are used for various purposes. In this blog post, I’ll share my experiences and insights to compare these generators and help readers decide which one might be the right choice for their needs.

Cummins 20KW Generator

If you’re looking for a reliable and durable generator, the Cummins 20KW generator is a great option. This generator boasts an impressive 20,000 watts of power and features a four-cycle diesel engine. This generator is also equipped with a Digital voltage regulator that ensures stable power output.

One of the biggest advantages of this generator is its fuel efficiency – during my testing, I found that it used fuel very conservatively, which means it can run for a long time without refueling. Additionally, the Cummins 20KW generator produces minimal noise, so it won’t be too much of a disturbance even in residential areas.

However, the generator’s main disadvantage is its price point – it is relatively more expensive than other generators in its class. But in my opinion, the high cost is worth it considering its excellent reliability and durability.

Generac 22KW Generator

The Generac 22KW generator is another reliable option with a powerful 22,000 watts engine. It also features automatic shut-off and start-up functions in case of a power failure, making it suitable for commercial and residential use.

In my experience, the Generac 22KW generator was a bit louder than the Cummins 20KW generator, but not overly so. A major advantage of this generator is that it is relatively easy to install and maintain, and comes with a five-year warranty.

However, one major disadvantage of the Generac 22KW generator is that it uses a lot of fuel. This could be a deal breaker for some users who are looking for a more fuel-efficient option.

Head-to-Head Comparison

Both the Cummins 20KW and Generac 22KW generators are excellent choices, but they have a few key differences that make them suited for different needs.

In terms of fuel efficiency and noise levels, the Cummins 20KW generator is the clear winner. But the Generac 22KW generator is relatively easier to install and maintain and comes with a longer warranty.

When it comes to price, the Cummins 20KW generator is more expensive than the Generac 22KW generator. However, it’s important to consider the long-term cost of ownership, including fuel usage and maintenance requirements.

Ultimately, the choice between these two generators will depend on your specific needs and priorities. If fuel efficiency and noise levels are your top priority, then the Cummins 20KW generator is likely the better choice. If you need an easier installation and maintenance process, then the Generac 22KW generator might be more suitable for you.


After thorough testing and comparison, I would definitely recommend both the Cummins 20KW and Generac 22KW generators, depending on what you’re looking for in a generator. Overall, I was particularly impressed with the fuel efficiency and reliability of the Cummins 20KW generator, but the Generac 22KW generator is also an excellent choice for users who prioritize ease of use and maintenance.

If you have any experiences or perspectives to share, please do so in the comments below. Thanks for reading!

List of 10 cummins 20kw generator vs generac 22kw

Bestseller No. 1
Champion Copper Plus 71 Spark Plug (Carton of 1)
  • Copper Plus - Dependable Performance and Durability
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SaleBestseller No. 2
Generac 6485 Scheduled Maintenance Kit for 20kW and 22kW Standby Generators with 999cc Engine , Black
  • Scheduled maintenance kit is for standby home generators
  • For use with the 20kW and 22kW air cooled standby generators from 2013 or later (999cc engine)
  • Maintenance is recommended every 200-hours or 2-years
  • Includes a pre-cleaner, air filter, oil filter, oil funnel, (2) spark plugs, blue cloth, instruction manual and maintenance sticker
  • Oil must be purchased separately
Bestseller No. 3
Generac - OIL FILTER 90 LOGO ORNG-CAN - 070185ES / 070185E 90mm High Capacity (30% More Filter)
  • This part is compatible with models including; 006237-0,006240-0,006437-0,006243-0,006244-0,006241-0,006242-0
  • This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including; 070185F
  • Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Generac
  • This oil filter (part number 070185E) is for generators
  • Wear work gloves to protect your hands when installing this part
SaleBestseller No. 4
Generac 2 Pack Genuine 070185ES Oil Filter Fits 070185E 70185 OEM
  • Brand New (2) Pack of Genuine Generac Oil Filters... We are an Authorized Generac Dealer... (2) Pack of Oil Filters Genuine Generac Part # 070185ES Supercedes Old Part #'s 70185, 70185B, 070185E 90 mm Fits Specific Generac Engines Genuine OEM Generac Part
Bestseller No. 5
Generac 6484 Scheduled Maintenance Kit for Home Standby Generators with 12-18 kW 760cc-990cc Engines
  • Scheduled maintenance kit is for standby home generators
  • Kit for 12-18-Kilowatt 760cc - 990cc Engines
  • Maintenance is recommended every 200-hours or 2-years
  • Includes a pre-cleaner, air filter, oil filter, oil funnel, (2) spark plugs, chamois, instruction manual and preventative maintenance reminder sticker
  • Oil must be purchased separately
SaleBestseller No. 7
Interstate Batteries 12V 9Ah High Rate Battery (HSL1069) Sealed Lead Acid Rechargeable SLA AGM (Nut & Bolt Terminal) Generac Generators, 0G9449, UPS Backup Systems
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  • COMPATIBLE MODELS: Generac Generators 005747,005939,005940,005941,006673,5798, 5939,5940,5940,5941,5943,5943,5943,5943,GP5500-5939,GP6500-5940,GP6500E-5941,GP7500E-5943,XG7000E-5798,XG8000E-5747,Vexilar 12VOLT,Vexilar FL-8SE Genz,0G9449,APC American Power Conversion BP420NP,B & B Battery HR9-12,HR912B1,CooPower CP12-10,Cyber Power
  • HIGH RATE SLA BATTERY: When power interruption is unthinkable, Interstate’s high-rate SLA battery will be there for you. HSL1069 ensures unbeatable backup for non-stop operation for UPS float standby systems & heavy-duty servers. Superior plate-to-terminal connections mean critical power – fast
  • OPTIMAL PERFORMANCE: Interstate’s long-lasting 0G9449 battery provides the power to start the generator engine for the electric start system for all your applications. Wear work gloves to protect your hands when installing. Provides a high percent of capacity in <1 hour. Flexibility of mounting orientation due to AGM chemistry
  • MOST TRUSTWORTHY POWER SOURCE: Since 1952, Interstate Batteries purpose has been to deliver the most Outrageously Dependable source of power to the world. Our customers come first, so we strive for customer satisfaction. We recycle more batteries than we sell; please return to an Interstate All Battery Center near you so we can continue recycling
Bestseller No. 8
DuroMax XP13000HX Dual Fuel Portable Generator-13000 Watt Gas or Propane Powered Electric Start w/CO Alert, 50 State Approved, Blue
  • All-new control center with a digital multimeter, push-button start, and a front-facing fuel interface allowing you to change your fuel type in seconds! The digital multimeter displays voltage, frequency, total hours run, and hours until the recommended maintenance
  • This generator runs on gasoline or propane, giving you the freedom and flexibility of fuel choice
  • Equipped with DuroMax “CO Alert Technology” that will automatically shut down the generator if an unsafe level of carbon monoxide is detected
  • Built using a powerful 500cc OHV DuroMax engine and features ALL COPPER WINDINGS designed to make your generator last for years
  • The fully loaded power panel includes four 120V GFCI household outlets, one 120V 30AMP outlet, one 120/240V 30AMP twist-lock outlet, and a heavy-duty 120/240V 50AMP outlet making it transfer switch ready!
SaleBestseller No. 9
DuroMax XP13000EH Dual Fuel Portable Generator 13000 Watt Gas or Propane Powered Electric Start-Home Back Up, Blue/Gray
  • POWERFUL DUROMAX ENGINE: The XP13000EH is powered by a 500cc OHV Duromax Engine. Engine Speed-3600 RPM. Wheel Diameter-10-Inches .With Gasoline : Peak Wattage - 13,000., Running Wattage - 10,500., Running Amperage at 120V - 87.5., Running Amperage at 240V - 43.75., Runtime at 25% Load - 17., Runtime at 50% Load - 8With Propane : Peak Wattage - 12,350., Running Wattage - 9,975., Running Amperage at 120V - 83.13., Running Amperage at 240V - 41.56., Runtime at 25% Load - 13., Runtime at 50% Load - 6Please read the detailed safety instructions in the manual before operating.
  • DUAL FUEL TECHNOLOGY: The ability to run on Propane or Gasoline allows the Freedom and Flexibility of Fuel Choice.
  • PLENTY OF POWER: With 13,000 starting watts and 10,500 watts, this unit can handle heavy loads from lights, refrigerators, home conditioners and high amperage power tools.
  • MAXIMUM POWER: The power panel includes a wide selection of outlets for maximum compatibility in your applications including: 1 120/240V 50A heavy duty outlet, 1 120/240V 30A twist lock outlet, 1 120V 30A twist lock outlet, and 2 120V 20A household outlets.
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Bestseller No. 10
EF ECOFLOW Portable Power Station DELTA 2, 1024Wh LiFePO4 (LFP) Battery, Fast Charging, Solar Generator(Solar Panel Optional) for Home Backup Power, Camping & RVs
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People also ask

What is a Cummins 20kw generator?

A Cummins 20kw generator is a standby power generator that has a power output of 20,000 watts, providing reliable backup power during a power outage.

What is a Generac 22kw generator?

A Generac 22kw generator is a standby power generator that has a power output of 22,000 watts, providing reliable backup power during a power outage.

What is the difference between a Cummins 20kw generator and a Generac 22kw generator?

The main difference between the two is the power output. While the Cummins generator has a power output of 20,000 watts, the Generac generator has a power output of 22,000 watts, making it slightly more powerful.

How long can a Cummins 20kw generator run?

The run time of the generator depends on various factors, such as the load on the generator and the fuel source. However, on average, a Cummins 20kw generator can run for around 8-12 hours on a full tank of fuel.

How long can a Generac 22kw generator run?

Like the Cummins generator, the run time of the Generac generator depends on various factors. However, on average, a Generac 22kw generator can run for around 8-12 hours on a full tank of fuel.

Which generator is better, Cummins 20kw or Generac 22kw?

The choice between the two generators ultimately depends on the buyer’s specific needs, preferences, and budget. Both generators are reliable and good quality, with similar run times and features. However, if you need slightly more power, then the Generac 22kw generator might be a better option.