How to find a quiet generator for your RV

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A quiet generator is not a luxury for your RV, but an essential need. 

As you search for a quiet generator for your RV, you have probably looked at various portable and RV generators. You likely saw numbers ranging from 50 to 80 decibels and are wondering how to interpret these numbers. Let’s start with what is quiet. 

What is a quiet portable or RV generator?

Here is an easy way to gauge decibel levels of different generators; a traditional vacuum cleaner generates about 70 decibels while normal human conversation is around 60 decibels. 

Examples on decibel levels

Unfortunately, finding the quietest generator for your RV is not as easy as comparing the decibels denoted in product brochures, since they are not always comparable. To celebrate the launch of our quietest RV inverter-generator sets, Onan QG 2800i and 2500i, we have put together this guide to find the quietest generator for your RV.

How to compare quietness of different portable and RV generators?

Many brands claim to have the quietest RV or portable generator in the market. To some extent, there is truth in this, since there are many ways to measure generator sound and determine how quiet generators are. Consider these

  1. Distance at which quietness is measured. If you measure the noise level for the same RV generator at three feet and 10 feet, the results will be different. Many manufacturers note in product brochures the measurement distance for you.
  2. Load level at which noise is measured. Often, generators produce more noise when working at higher load levels. Comparing two generators’ noise levels when one is working at half load while the other is working at full load could mislead you. Check the product brochure to ensure you are comparing quietness at similar load levels. 
  3. The angle the noise is measured. This one is difficult to compare, because most manufacturers don’t share this information in product brochures. One might measure sound levels in multiple locations, or they might just measure where the noise is lowest. We can’t speak for other manufacturers, but at Cummins we measure the noise levels at seven different angles all around the RV generator, then take the average to denote the noise level of the generator. 

Finally, keep in mind that what size generator you need to power an RV also impacts the quietness of your generator.

Are portable generators more quiet than RV generators?

If you are in the market for a generator for your RV, your two top choices are portable generators and RV generators. RV generators are the ones that come installed within your vehicle. They both have their own advantages and we will cover those separately in another article. 

When it comes to how quiet these generators are, there are a couple things to keep in mind. Manufacturers measure the noise level of an RV generator before installing it in your vehicle. RV manufacturers install these generators in a compartment within your vehicle. This compartment has sound dampening features. Consequently, when you run the RV generator, it will sound quieter than the stated decibel rating.

However, the portable generator has the benefit of being placed away from your RV. This means a portable generator may sound louder outside your coach than an installed RV generator. Meanwhile, it will also sound quieter than its rating inside the coach. Looking at two generators with identical ratings, an installed RV generator will be quieter both inside and outside the coach. Meanwhile, they may both sound similar inside the coach.  

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Generators
Aytek Yuksel - Cummins Inc

Aytek Yuksel

Aytek Yuksel is the Content Marketing Leader for Cummins Inc., with a focus on Power Systems markets. Aytek joined the Company in 2008. Since then, he has worked in several marketing roles and now brings you the learnings from our key markets ranging from industrial to residential markets. Aytek lives in Minneapolis, Minnesota with his wife and two kids.

Cummins Custompaks are being used for water management as Thailand struggles with its water crisis

CustomPak on site

Water crisis

Sixty Cummins Inc. CustomPaks are in service in Thailand as part of a critical water management plan aimed at easing the country’s water crisis – a crisis that has caused enormous economic and social damage and stirred conflict among communities.

Over the past several decades, Thailand has continually faced water problems caused by severe drought. Water reserves in dams and reservoirs are insufficient while water resources are often contaminated with toxins caused by urban communities and the industrial and agricultural sectors.

Severe flooding is a threat, too, at a time when the realities of climate change are hanging over the country.

As a result, the allocation of precious water resources, which must be shared among various stakeholders including new and existing industry, large and small agriculture, and cities and villages has become a flashpoint.

Kittithanapat Engineering Co. (KTP), has been involved in the water management system since 1996, working closely with authorities such as the Royal Irrigation Department, Department of Water Resources, Bangkok Metropolitan Authority and others.

CustomPaks on site

600 hp CustomPaks

To help KTP meet its often urgent requirements, Cummins DKSH (Thailand) has recently supplied 60 Australian-built CustomPaks – 45 powered by Cummins’ X15 engine rated at 600 hp, and 15 powered by the QSL9 rated at 325 hp. These fully self-contained powerpacks are emissions certified to Tier 3.

The CustomPaks are coupled to hydraulically-driven, large-volume submersible water pumps sourced by KTP from US company Moving Water Industries (MWI); KTP is the exclusive distributor in Thailand for these MWI Hydroflo pumps.

Prior to Cummins’ involvement, KTP was using another diesel engine brand but service support wasn’t up to the standard required.

Long-serving KTP engineer Kittisak Thanasoot says Cummins DKSH’s reputation for technical and aftersales support along with the reliability of the Cummins product were a key reason behind KTP’s decision to specify the CustomPaks for the Royal Irrigation Department.

The ability of Cummins DKSH to respond to short delivery times was also important.

“Supplying large quantities of high horsepower diesel engines for emergency situations such as flash flooding can be a challenge for KTP,” says Kittisak Thanasoot.

“Responding to the needs of the government agencies to manage such problems in a timely manner and with least impact on communities, KTP has found the answer in our partnership with Cummins DKSH.”

Power, pride and passion

Parked semi truck

The switch back to Cummins power has been beneficial for iconic New Zealand company Uhlenberg Haulage. It's all about whole-of-life costs.

Uhlenberg Haulage is closing in on 60 years in business, having been founded in 1966 by Mike and Carol Uhlenberg.

Based in Eltham, Taranaki, in New Zealand’s North Island, the operation is today owned and operated by their sons Chris, Daryl and Tony Uhlenberg.

Describing the Uhlenbergs as “old school family truckies”, Daryl talks about the company’s time-honored journey with a definite tone of pride, especially the work of his parents in laying the foundations for what is today an iconic fleet in its own right.

Cummins Inc. made its debut in the Uhlenberg fleet in 1971 with an NH250 powering a second-hand Kenworth K923 used in logging. A second Kenworth, a new W924 with a Cummins NTC335, followed soon after hauling an LPG tanker.

The Uhlenberg operation today comprises 40 prime movers and a variety of trailing gear to cater for the myriad of a jobs the fleet is involved in.

A number of Peterbilts feature in the fleet although Kenworth is now the brand of choice with six new units to be delivered over the next 12 months to cater for business growth.

Cummins’ X15 Euro 5 engine rated at 550 or 600 hp is the preferred power specification, with 18 red engines currently in the fleet.

Uhlenberg family in front of truck

Whole-of-life support

“The switch to Cummins has been a very good experience for us. We have nothing but praise for the Cummins organization,” says Daryl.

“The whole-of-life picture is the key thing for us and we’ve got that nailed with the support we get from Cummins – parts availability, scheduled maintenance, life expectancy and in-frame rebuilds.

“So the red engines turn up, we run them to life, which is 900,000 to 1.2 million kilometers, and then Cummins does an in-frame overhaul in a timely manner. If there’s an issue, parts and support are close by.

“The support we get from Cummins Palmerston North is fantastic, second to none.”

Daryl recently looked under a Kenworth that was in the workshop for a service and was surprised to see no oil leaking from the one-million-kilometer X15. “I remember when I was a fitter we had to wear a raincoat when working under a truck,” he jokes.

Fuel agnostic

Acknowledging that the push to decarbonize is now “very real”, Daryl likes the idea of Cummins’ fuel agnostic concept where one base internal combustion engine, optimized to run on diesel, can also be customized to run on ultra-low and zero-carbon fuels like renewable natural gas and hydrogen.

“My father was a pioneer of linehaul trucking in New Zealand and he always embraced new technology. He was never scared of it,” he says.

“I tend to be a little more cautious but I can see where a 500 hp natural gas or hydrogen engine would work for us in short haul applications,” he admits. “We’re certainly willing to look closely at these alternative fuel technologies when suitable infrastructure is in place.”

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