6 Best Portable and RV Tankless Water Heaters Review

If you are one of the 45 million Americans who enjoyed RV camping last year, then you are someone who loves the allure of the great outdoors. On the other hand, you may be here looking for a way to bring some of the comforts of home with you like taking a hot shower. One way to do that is with a portable tankless water heater. For the best water heater, you should choose the right model that will accommodate your specific need. Fortunately, this comprehensive guide will provide information on the best portable and RV water heaters. Please read the information provided below to find the one you need, whether you want one for camping, mobile vending or a road trip, you will want one that has the right features and works within your budget.

Within this comparison and review guide of portable RV tankless water heaters is a wealth of information and a wide range of options. Our goal is to make sure that every RV enthusiast finds the right water heater that is right for them. From hot outdoors showers to doing the dishes, you will find a great selection at affordable prices. We believe that the money you spend on one of these models will be a solid investment.

When it comes to dependable and portable water heaters, quality reflects the price. The more features a heater has, the more expensive it will be. The more expensive models have more BTUs that generates more hot water per hour, refills quicker, and heats water faster. If you want the same options in your RV that you have at home, then you might want to consider an upgrade from the standard 6 or 10-gallon water tank that comes with most RVs and trailers or an on-demand tankless model that has a higher BTU output. If you live permanently in your RV or spend a lot of your time traveling abroad, you should consider a tankless water heater.

Our Goal is that this comprehensive guide and review of the six best portable tankless water heaters will help you find the right one fast and easy. We hope that you have a great time on your next outdoor adventure.

Comparison of the Top 6 Portable and Tankless RV Waters Heaters in the Market Today

Preview
Best Price
Eccotemp L10 2.6 GPM Portable Tankless Water Heater 1 Pack White
EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE
PrecisionTemp RV-550 Tankless Water Heater - Wall Vented
Best Choice
Portable Propane Tankless Water Heater - EZ 202 - EZ Tankless - Battery Powered Ignition - Camping RV
Atwood RV On-Demand Water Heater OD-50 w/ White Door
AquaKing Tankless Portable Propane Tankless Water Heater
Title
Eccotemp L10 2.6 GPM Portable Tankless Water Heater 1 Pack White
EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE
PrecisionTemp RV-550 Tankless Water Heater - Wall Vented
Portable Propane Tankless Water Heater - EZ 202 - EZ Tankless - Battery Powered Ignition - Camping RV
Atwood RV On-Demand Water Heater OD-50 w/ White Door
AquaKing Tankless Portable Propane Tankless Water Heater
Prime Benefits
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Best Price
Preview
Eccotemp L10 2.6 GPM Portable Tankless Water Heater 1 Pack White
Title
Eccotemp L10 2.6 GPM Portable Tankless Water Heater 1 Pack White
Prime Benefits
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Preview
EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE
Title
EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE
Prime Benefits
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Preview
PrecisionTemp RV-550 Tankless Water Heater - Wall Vented
Title
PrecisionTemp RV-550 Tankless Water Heater - Wall Vented
Prime Benefits
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Best Choice
Preview
Portable Propane Tankless Water Heater - EZ 202 - EZ Tankless - Battery Powered Ignition - Camping RV
Title
Portable Propane Tankless Water Heater - EZ 202 - EZ Tankless - Battery Powered Ignition - Camping RV
Prime Benefits
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Preview
Atwood RV On-Demand Water Heater OD-50 w/ White Door
Title
Atwood RV On-Demand Water Heater OD-50 w/ White Door
Prime Benefits
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Preview
AquaKing Tankless Portable Propane Tankless Water Heater
Title
AquaKing Tankless Portable Propane Tankless Water Heater
Prime Benefits
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Review of the Top 6


1. Eccotemp L10 Portable Outdoor Tankless Water Heater

Sale
Eccotemp L10 2.6 GPM Portable Tankless Water Heater 1 Pack White
  • Includes 9' CSA approved gas regulator and hose for use on a standard 20 lb grill style tank
  • Includes stainless steel rain cap; 74,500 BTU's
  • Flow Rate: 2.6 GPM
  • Dimensions: 15 x 6.5 x 35 inches
  • Weight: 27 pounds
  • Power Source: Propane Gas-Powered
  • Warranty: 1-Year Warranty Heater
  • Made In: USA

The compact L10 designed by Eccotemp is an ideal solution for the perfect portable water heater. If you live in a warmer environment and would love to have an outdoor shower? The L10 will get the job done, and it also provides hot water for outside grooming of animals. You can have hot water in places like a remote camp, secluded island or anywhere for that matter. For those who live off the grid, this devise is the ultimate solution to solve all of your hot water issues. The three ignition points ( gas, ignition, and water) are virtually maintenance free, and it provides about 2.6 GPM which is just about perfect for smaller applications.

The Eccotemp L10 is affordable, and it provides hot water on-demand when you need it the most. The L10 is designed with a stainless steel rain cap, so it won’t rust and protects the interior elements and heating components. Another added benefit is that the L10 comes with nine feet of CSA-approved gas hose and regulator. This eliminates the need to modify or cut into the gas line from your home by using this portable RV tankless water heater with a standard 20lb propane tank. You can expect to get about 74,500 BTUs of maximum input for this unit.

There’s no need to hook the unit up to electrical lines because the L10 come with battery ignition. This unit is great for those who like to hook things up fast. The L10 also comes with a 1/2 inch NPT garden hose adaptor, making this a pipe-free installation!


2. EZ 101 Propane Tankless Water Heater

EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE
  • Battey Powered Ignition - 2 "D" Cell Battteries Not Included
  • Great for use at campsites, while fishing, while hunting, or any where hot water is needed.
  • Flow Rate: N/A
  • Dimensions: N/A
  • Weight: 14 pounds
  • Warranty: Manufacturers
  • Made In: USA

If you live in a tropical environment with gale-force winds and often experience power outages? There’s nothing quite like having a portable LPG tankless RV water heater that is battery powered and attaches to your existing water and gas lines. This is a great device to have in these types of situations. Additionally, it can be used on camping trips, nature trails or anywhere where having available hot water on demand is a problem.

The EZ 101 portable RV tankless water heater is a good unit and affordable. Traveling with the EZ 101 is a breeze, it only weighs about 14lbs, so getting it to remote locations with a 4×4 vehicle or in a boat is possible.

The EZ 101 ignition does require two D-cell batteries that need to be purchased separately. It’s a good idea to have spare batteries on hand in case the ones you have died. Another good tip is to buy a bulk pack of D-cells because it’s cheaper, and they can be used in your flashlights and other outdoor gear. You can expect to get about 1.6 GPM, making this a great device for single appliances.

This is a draft unit, and the manufacturers suggest that is designed for “outdoor use only” because the intake pulls in air from the surrounding air; therefore, it’s not recommended for indoor use. It’s best used in places like barns, shelters, sheds, and workshops or in areas where there is plenty of ventilation. It’s a safe alternative for outdoor installation because the battery-started ignition eliminates the need for a pilot light.


3. PrecisionTemp RV-550 Tankless Water Heater

PrecisionTemp RV-550 Tankless Water Heater - Wall Vented
  • Designed specifically for RVs, trailers, tiny houses, cabins, mobile washing services, and more
  • Takes up 1/2 the space and weighs 1/3 as much as a 10-gallon tank
  • Flow Rate: 0.5 GPM
  • Dimensions: 13.5” (W) x 13.5” (D) x 14.25” (H)
  • Made In: USA
  • Power Source: Propane Gas-Powered
  • Warranty: Manufacturers
  • Made In: USA

If you are searching for a recreational vehicle tankless water heater, there’s another type of RV-specific device you should consider. This unit works great in small homes and trailers, and it costs about as much as the Atwood heater, so it does come with a premium price tag.

Here’s some food for thought for those who are looking for a domestic made appliance: The RV-550 is assembled, tested, and designed in the USA. As an illustration, if you previously owned a 10-gallon hot water tank, the RV-550 measures 13.5” (W) x 13.5” (D) x 14.25” (H) and only uses about half of the space. Anyone with experience camping in an RV knows how valuable that space is. Additionally, it also uses a power-vented sidewall penetration system to circulate and exhaust air.

The RV-550 will not waste any energy because with a propane tank fuel source, it only supplies hot water when you need it. It has a maximum input of 55,000 BTUs and is very energy efficient. The manufacturers at PrecisionTemp also integrates the gas modulation valve assembly that’s the perfect spark for ignition. It also utilizes a variable gas input that’s based on the rate of water flow, which controls the water outlet temperature. This unit offers a reduction in propane use and saves on average of 20 to 50 percent less fuel. Due to the fact, it doesn’t have a pilot light and propane is only used when hot water is required, unlike a traditional hot water tank.


4. EZ 202 Portable Propane Tankless Water Heater

Portable Propane Tankless Water Heater - EZ 202 - EZ Tankless - Battery Powered Ignition - Camping RV
  • Easy Portability - Only 15 LBS
  • Battey Powered Ignition - 2 "D" Cell Battteries Not Included
  • Flow Rate: 3.2 GPM
  • Dimensions: N/A
  • Weight: 28 pounds
  • Power Source: Propane Gas-Powered
  • Warranty: Manufacturers
  • Made In: USA

The EZ 202 is an upgrade from the EZ 101, and it can produce up to 3.2 GPM of continuous hot water. This is also a draft unit and the same rules for ventilation and outdoor installation provided above should be followed. If your in search of a portable tankless water heater that provides occasional hot water on-demand, this is a great choice. The easy propane attachment makes it ideal for camping or hunting trips, where accessibility to hot water is an issue. It can also be used for summer-long campsites, semi-permanent outdoor installs or remote cabins or homes that are small. Costing almost as twice as much as its predecessor the EZ 101, the EZ 202 gives you a higher GPM flow, easy hookup to 1/2 inch water and gas lines and is worth the little extra money. The same rules apply, this unit requires two D-cell batteries to power the unit; however, there’s no need to worry about inclement weather or electricity to start the device, it’s very self-sufficient.

This unit also needs to be installed in climates that are made for outdoor appliances. It’s highly advised not to install this device indoors because in colder environments a backdraft can occur, which can leak, crack, and freeze the water pipes in the heat exchanger. Installing the unit under these circumstances will void your warranty. Just like any other tankless water heater, installing filters on the waterlines ahead of time will protect the interior components from deposits or mineral scale.


5. Atwood OD-50 On-Demand RV Water Heater

Atwood RV On-Demand Water Heater OD-50 w/ White Door
  • Atwood On-Demand Water Heater
  • Provides a continuous hot water experience
  • Flow Rate: 3.5 GPM
  • Dimensions: N/A
  • Weight: 27 pounds
  • Power Source: Propane Gas-Powered
  • Warranty: Manufacturers
  • Made In: USA

This unit is an on-demand water heater manufactured by Atwood and is designed specifically for RV use. There’s no need for having a heavy tank of water in your RV that constantly sloshes water around, this unit only supplies hot water when you need it. This is especially important for those who live in their RV on a permanent basis or take long cross-country trips. All of that extra weight can impact your fuel efficiency and your wallet. The only minor inconvenience is filling up your propane tank, but how often would you need to do that? A lot less often than you might think, the OD-50 utilizes a flow-controlled valve system to adjust the input gas burner from 16,000 – 50,000 BTUs based on the water flow rate.

Engineered to fit inside compact spaces and most hot water heater areas, it accommodates cut-out sizes from 12.5-16” (W) x 12.5-16” (H) x 16” (D) min. The unit also comes with a nice white door to cover up any imperfections left over from the open space.

Don’t be shocked when you discover how much the Atwood OD-50 RV on-demand costs, but on the other hand, it’s a solid investment for long-term use and eliminates the small 6-gallon tanks found on most RVs.


6. AquaKing Outdoorsman Propane Tankless Water Heater

  • Flow Rate: 2.0 GPM
  • Dimensions: 11.7″ (W) x 4.7″ (D) x 19″ (H)
  • Weight: 27 pounds
  • Power Source: Propane Gas-Powered
  • Warranty: 1-year parts/5-years heat exchanger
  • Made In: USA

True to its name, the AquaKing Outdoorsman is designed for those who are die-hard fishing and hunting enthusiast or for those who love to go to remote places for their leisure and sports. Other high-impact outdoor enthusiasts like off-roaders, hikers or climbers, dirt-bikers, or skiers could enjoy the benefits of owning the AquaKing Outdoorsman. This is the perfect solution for mobile businesses who need hot water for sanitation reasons or mobile dog grooming applications. It weighs in at 10 lbs and is not only compact but powerful. It can be taken anywhere you want to take it, even to remote locations. Throw it in your boat or 4-wheeler and leave with confidence that you will have hot water at your disposal. It’s just like having all of the amenities of home!

The AquaKing can be used at any location that has a propane gas and water line hook up without the need for electricity. It does require two D-cell batteries like the other mentioned models; however, it’s a lot easier to set up and go than some other models. It’s a good idea to manually inspect your 1/2 inch lines to make sure they join the AquaKing Outdoorsman.

The AquaKing is a very affordable unit, which makes it an ideal solution for those who are on a budget and want to utilize this unit for specific locations or unique situations. It works great for those who don’t use their campers on a frequent basis and for campers who want a nice hot outdoor shower. It has a thermal efficiency of 84 percent, and you can expect about 1.6 GPM for your hot water taps and shower. In the end, this is a handy battery-powered water heater with a decent GPM and price.


Summary

It’s important to understand that these devices will not replicate the power or temperature like your system at home. There will be a learning curve when it comes to adjusting the cold water supply to get the right temperature you want.

Today’s modern technology has made significant improvements to integrate modern appliances for outdoor camping convenience. It’s a great feeling when you can take a hot shower after a few days of going without one. It doesn’t matter if you are an avid explorer or camper, time spent under the sun during the day and nighttime chills can be resolved with a hot shower. Taking a hot shower while camping reduces body odor and provides a good night’s rest.

Moving away from standard water heater tanks reduces both your utility bill and the risk of having a flooded camper or RV due to an aging system. Making a decision to upgrade your existing system can be a little stressful, especially with the unknown; however, any one of the portable RV tankless water heaters mentioned above will make you glad that you made the switch. It’s a known fact that RV or small home living will have some accommodating issues atypical of compact designs, but hot water isn’t an area to sacrifice. The industry is making significant strides towards more energy efficient tankless water heaters and will continue as long as consumers have a demand for them.

We honestly believe that tankless water heaters are the future, and in places like Asia and Europe, people have been using them for decades. You need to have some realistic expectations, take the time to understand the change and how to implement the change for the better. You can learn to utilize your new tankless RV water heater just like any other new gadget, with trial and error. You won’t know just how good it is until you try one!