generac vs. onan rv generator


As an avid RV traveler, I know that having reliable power on the road is crucial. That’s why I decided to write a review and comparison of Generac and Onan RV generators. Both companies offer top-of-the-line products, but which one reigns supreme? In this article, I’ll provide a comprehensive breakdown of power output, fuel efficiency, noise level, ease of installation and maintenance, price, and overall value for money.

Power Output

When it comes to power output, Generac and Onan both offer a range of options to suit different needs. Generac’s RV generators range from 2,800 watts to 7,500 watts, while Onan’s range from 2,800 watts to 12,500 watts. In terms of maximum power output, Onan clearly outshines Generac. However, the average RV traveler likely won’t require that level of power, so Generac’s lower range options may be more practical.

Comparison of power output between Generac and Onan RV generators

Ultimately, the decision of which RV generator to choose will depend on individual power needs. If you need a higher level of power output, Onan may be the better choice. However, if you only require a moderate amount of power, Generac is still a reliable option.

Fuel Efficiency

Fuel efficiency is another important factor to consider when it comes to RV generators. Both Generac and Onan offer options with electronic fuel injection, which can improve their fuel efficiency. However, Onan generally has a better reputation for fuel efficiency in their RV generators.

Comparison of fuel efficiency between Generac and Onan RV generators

Based on my research and personal experience, Onan’s RV generators tend to have a higher fuel efficiency rating than Generac’s. This means that Onan would be the better choice if you want to save money on fuel costs in the long run.

Noise Level

Noise level is another critical factor to consider when purchasing an RV generator. Noisy generators can be a major inconvenience for RV travelers and can even disturb nearby campers. Both Generac and Onan offer RV generators that are designed to be quieter than traditional generators, but which company’s product performs better?

Comparison of noise level between Generac and Onan RV generators

In terms of noise level, Generac’s RV generators generally perform better than Onan’s. Generac’s Quiet Source series, in particular, is designed to operate at a lower decibel level than traditional generators. If noise level is a top concern for you, Generac may be the better choice.

Ease of Installation and Maintenance

Installing and maintaining an RV generator can be a daunting task, so it’s crucial to choose a product that is easy to install and maintain. Both Generac and Onan offer RV generators with user-friendly controls and straightforward maintenance processes, but which company’s products are easier to work with?

Comparison of ease of installation and maintenance between Generac and Onan RV generators

Based on my research and personal experience, I found that Onan’s RV generators tend to be slightly easier to install and maintain than Generac’s. Onan’s user-friendly controls and maintenance processes make it a more accessible choice for novice RV owners.

Price and Value for Money

Price is always a major consideration when purchasing any product, and RV generators are no exception. Both Generac and Onan offer RV generators at different price points, but which one offers the best value for money?

Comparison of prices and value for money between Generac and Onan RV generators

On average, Generac’s RV generators tend to be more affordable than Onan’s. However, Onan’s higher-level models can be more expensive. Overall, Generac offers better value for money for RV owners looking for a practical and reliable generator.

Pro and Cons

Before making any purchase, it’s important to consider the advantages and disadvantages of each product. Here are the pros and cons of both Generac and Onan RV generators:

Generac’s advantages and disadvantages:

– Affordable
– Moderately powered models
– Quieter operation than traditional generators

– Fewer options in terms of power output
– Lower fuel efficiency compared to Onan

Onan’s advantages and disadvantages:

– Wide range of options in terms of power output
– Better fuel efficiency
– User-friendly controls and maintenance processes

– More expensive than Generac
– Louder than Generac’s Quiet Source series

Comparison of pros and cons between Generac and Onan RV generators

Ultimately, the choice between Generac and Onan RV generators will depend on individual needs and preferences. If power output and fuel efficiency are the top priorities, then Onan is the better choice. However, if affordability and ease of use are more important, then Generac is the better option.


After conducting thorough research and considering personal experience, I recommend Generac for RV owners looking for a reliable and practical generator. While Onan may have an edge in terms of power output and fuel efficiency, Generac’s affordability and ease of use make it the better overall choice.


– (n.d.). Generac Power Systems. Retrieved from
– (n.d.). Cummins Onan. Retrieved from
– RVshare. (2019, May 10). The Best RV Generators for Travel Trailers and Fifth Wheels. Retrieved from

List of 10 generac vs. onan rv generator

SaleBestseller No. 1
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. 2
Generac 8250 GP2500i 2,500-Watt Gas-Powered Portable Generator, CARB Compliant
  • 50 State Configuration/CSA
  • Compact and Lightweight
  • Makes transportation easy with built-in handle
  • Automatically adjusts engine speeds to save fuel and reduce sound emissions
  • Alert you when unit is low on oil, overloaded or ready-to-use
Bestseller No. 3
Generac 5721 Portable Maintenance Kit for 992cc Engines
  • Portable maintenance kit for 992cc Engine
  • Helps you extend the life and maintain the performance of your portable generator
  • Includes air and oil filters
  • Also includes spark plug and a spark plug wrench, oil funnel, stable sample
  • Chamois pieces
Bestseller No. 4
Generac 7043 22kW Air Cooled Guardian Series Home Standby Generator with, 200-Amp Transfer Switch
  • Up to whole house protection with the 200 Amp, NEMA 3R (aluminum outdoor enclosure) smart switch
  • Smart, User-friendly controls; Generac evolution controller features a multilingual LCD display that allows you to Monitor Battery status and track maintenance intervals to ensure your generator is always in top operating condition
  • 240 volts supply
  • Receive real time status updates
SaleBestseller No. 5
Generac 0C30250SRV Oil Pressure Kit Replaces 0G6820
  • Comes with screw contact connections instead of sliding contact connections; adapters/terminals needed
Bestseller No. 6
Generac 0C3025 Generator Oil Pressure Switch
  • Comes with screw contact points
  • Requires fork terminals for slide connections
Bestseller No. 7
Generac 7118 Parallel Kit for GP2200i and GP2500i Inverter Generator
  • Double your power – connect two inverters together for 2 times the power, up to 3,230 running watts and 4,400 starting watts
  • Connect your loads to the kit's L5-30R twist lock or TT-30R (RV) receptacles
  • Easy access storage compartment in the back keeps power cables safe when not in use
  • Rated 120 VAC amperage is 28.2 when paralleled
Bestseller No. 8
Generac 2 Pack Genuine 0D6313 Fuel Filter for XG4000 XG7000E XG8000E GP15000 OEM
  • Brand New (2) Pack of Genuine Generac Fuel Filters... We are an Authorized Generac Dealer... Fuel Filter 2 Pack Genuine Generac Part # 0D6313 Fits Specific Generac Models Genuine OEM Generac Part
Bestseller No. 9
Generac Guardian 24kW Home Standby Generator with PWRview Transfer Switch Wi-Fi Enabled
  • Save up to 8,000 dollars in product and installation costs (when compared to competitive output products)
  • Takes up 70% less space (when compared to competitive output products)
  • PWRview, Generac's home energy management system, allows generator owners to monitor and manage home energy usage, leading to a reduction in electric utility bills of up to 20%
  • Using PWRview you could save enough to pay for your generator
SaleBestseller No. 10
Generac 76762 GP8000E 8,000-Watt Electric Start Gas-Powered Portable Generator with CO-Sense, CARB compliant
  • Featuring power Rush advanced technology – delivers over 30% more starting capacity allowing you to do more with less
  • Dimensions: 27.2" W x 27" D x 26.5 H | Weight: 198 lb
  • 10000 Starting Watts. 8000 Running Watts
  • Electric start Model for easy operation (Battery included)
  • Generac durable OHV engine with splash lubrication provides a long engine life

People also ask

FAQs for Generac vs. Onan RV Generators

Q: What is the difference between a Generac and Onan RV generator?

A: Both Generac and Onan are reputable brands, but they have differences in terms of features and functions. Generac offers more affordable and compact models, with options for propane or gas-powered generators. On the other hand, Onan specializes in high-end models with advanced technology and quieter operation.

Q: How do I determine what size generator I need for my RV?

A: The size of the generator depends on the power requirements of your RV appliances and devices. It is advisable to assess the wattage of each device you need to run, and then determine the total wattage requirement. From there, you can choose an RV generator with a suitable wattage capacity.

Q: Can I install an RV generator myself?

A: While it is possible to install an RV generator yourself, it is recommended to have a professional handle the installation. Many factors like wiring, fuel, ventilation, and other installation requirements should be considered, and a professional installer can ensure that the generator is installed correctly.

Q: How often do I need to service my RV generator?

A: Regular maintenance and servicing are crucial for the longevity and optimal performance of your RV generator. It is recommended to have your generator checked every 50-100 hours of use or at least once a year, depending on usage and manufacturer guidelines.

Q: What is the typical lifespan of an RV generator?

A: The lifespan of an RV generator depends on various factors like usage, maintenance, and quality. Generally, a generator is designed to last between 10-15 years, but with proper care and maintenance, it can exceed that time frame.

Q: Which brand is better, Generac or Onan?

A: The choice between Generac and Onan depends on your preferences and needs. Both brands offer reliable and quality RV generators with varying features and capacities, and the choice mainly depends on your budget, usage, and specific requirements.