Top 10 Best RV Tankless Water Heater Reviews

If you are a traveler, hunter, hiker, biker and an outdoor person, you must know the necessity of hot water to bathe after a tiring day. If you have a tank that preserves 6 gallons of water, that may not prove to be sufficient for you or your partner. Then, what’s the solution? We see no better alternative to RV tankless water heater in this scenario. With it, you do not need to worry about the constant supply of hot water without getting worried about the scarcity of water. Nowadays, people are moving to go tankless as it is very easy to install and energy-saving as well. If you are such a person we have mentioned above, you can think about an RV tankless water heater.

However, finding the best RV tankless water heater is not easy. You may get confused seeing thousands of advertisements claiming those water heaters to be the best of all.

Our Top 9 Best RV Tankless Water Heater

Keeping the variety of choice and preference in mind, we have come with 8 best RV tankless water heaters available out there. Look through these water heaters with their features, pros, and cons to get an idea about them, and then choose one that meets your preference and criteria. However, before buying one, you should know what to look for when you buy an RV tankless water heater. We have come with a buying guide with a FAQ session at the end of this article to help you. Let’s start with the review.

1. PrecisionTemp RV-550 Tankless Water Heater

To get supplied with refreshing hot water while you are hiking or traveling with buddies is relaxing, isn’t it? PrecisionTemp RV-550 will ensure that you are never out of water in your RV. For you tiny dwelling or cabin, this tankless RV water heater is just perfect. It saves both space and energy.

Being only 32 pounds, it is very lightweight. With automatic gas modulation feature, you will experience the self-adjustment of gas usage as per water flow and water temperature. This water heater makes sure that your water is not overheated in summer and not cold in winter. If cold weather protection is activated, you need only 3 amps to operate it. Being assembled, designed and tested in the USA, this is one of the best Best RV tankless water heaters of the time.


Water Flow Rate: You can get up to 1.0 GPM of water flow which is a pretty good amount as RV tankless water heater.

Power Supply: PrecisionTemp RV-550 requires 12V propane or 110 volts (need to purchase a converter of 12V).  supply to work.

Dimensions and Weight: Being 13.5″ wide, 13.5″ deep and, 14.25″ high, this does not occupy much space. When it comes to weight, it is 32 pounds.

Color: Besides being available in white color, you can also choose to pick a silver aluminum door or painted black door.

Installation Method: This unit of RV-550 needs to be mounted on the wall.

What we like and don’t like!


  • Cold-water protection technology.
  • Uses a bit more than 1.5 amps to operate normally.
  • 55000 BTUs of amazing water output.
  • High propane efficiency with VariFlame control technology.
  • Great for small cabins and studio apartment.
  • Uses less energy.


  • Takes more time to start heating.
  • May output unbearably hot water.

2.Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heater

Eccotemp FVI12-LP is incredibly efficient when it comes to supplying instant hot water in your need. Being ready to install as soon as you bring you it out of the box, this tankless water heater is very much. Made for small homes and cabins, you can use it with a propane tank of 20 to 100 pounds. You can set your desired temperature manually while you use this unit of water heater, be it flow rate or gas pressure. This is an energy saver unit that you can install easily indoors with ventilation. A digital temperature display is also here to let you know the temperature. With an electric ignition system and two years of limited warranty, you can feel safe using it.


Water Flow Rate: When it comes to water flow rate, it supplies an impressive 4 GPM of water while it consumes 3.5 GPM.

Temperature Range and BTUs: This unit of tankless water heater can be run with a temperature range of 80 degrees F to 140 degrees F. The maximum BTU is 80,000.

Dimensions and Weight: Featuring a dimension of  29 x 17 x 11 inches, Eccotemp FVI12-LP saves your space. The weight of this tankless water heater is 33 pounds which means it is quite lightweight.

Water Pressure: With this tank installed in your home, you will get a maximum water pressure of 80 PSI.

Color and Shape: Coming in white color, it is rectangular in shape.

Warranty Period: This unit of water heater features a limited warranty of 2 years.

What we like and don’t like!


  • Digital temperature display.
  • Manual temperature control.
  • Compact and space-saving.
  • The minimal output of the noise.
  • Secured electric ignition.
  • Easy to install.
  • Good flow rate.
  • Best for cabins and small apartments.


  • Small output and input passage.
  • Inconsistent performance.

3. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas

Takagi T-KJr2-IN-NG is designed to be installed indoors and run by natural gas. You can easily convert it into the direct-vent unit if you want. Coming with a BTUs rate of 19,500 140,000 per hour, it also offers a maximum water flow rate of 6.6 gallons per minute. You can always monitor the temperature by inlet and outlet. As it is only 37 pounds in weight. No matter how much hot water you need for your bathrooms and home use, you can rely on Takagi T-KJr2-IN-NG to supply that. It can cover the daily demand for hot water in your family. Using AC 120 V and certified by energy star, it ensures that you get the best utility out of it.


Water Flow Rate: Takagi T-KJr2-IN-NG has a maximum flow rate of 6.6 GPM which is pretty enough to cover a family with several washrooms.

BTUs: You will experience a BTU of 19,500 to 140,000 if you buy this water heater.

Dimensions and Weight: you will find to carry it easily because it is only 37 pounds. When it comes to the dimension, Takagi T-KJr2-IN-NG is 20.3 inches in height, 13.8 inches in width and 6.7 inches in depth.

Energy Factor: Saving energy is one of the characteristics of Takagi T-KJr2-IN-NG. It has an amazing energy efficiency factor of about 0.82.

Voltage: You need to ensure AC 120 volts to make sure that everything runs well.

Warranty Period: Do not get worried about the product. It is because it comes with a warranty period of 10 years for heat exchanger and 5 years for parts. However, make sure that you have installed the heater with the help of a licensed technician. Otherwise, you cannot claim the warranty.

What we like and don’t like!


  • Stainless steel venting.
  • Durable and lightweight.
  • Standard inlet and outlet thermistors to ensure constant monitoring of temperature.
  • The good energy efficiency factor.
  • Energy Star certified
  • Perfect for a medium-sized family.


  • You need to have the water tap run in full swing to get the quick output.
  • Not very easy to install.

4. Girard 2GWHAM On-Demand Tankless Water Heater

Girard 2GWHAM has come into existence after the culmination of experience and research by the manufacturing company Girard Prod. Listening to the experience and demand of the customers, the company has tried to design this brand new tankless water heater to meet the expectations. With Girard 2GWHAM, you can have an endless supply of hot water for your home. Handling and installing the water heater is very easy. You can also add cold water to the hot water to get the temperature that you want. It is not tough to have the desired temperature as you want. With the microprocessor monitor in it, you can ensure that you get a constant hot water flow whenever you want.


BTUs: To get the optimum performance out of Girard 2GWHAM, 42,000 BTUs is in your service.

Dimensions and Weight: Having a product dimension of 15.5 x 22.5 x 12.5 inches, it weighs 21.2 pounds.

Voltage: It can be operated with 12V when it will use less than 3 amps.

Warranty Period: To ensure that you get cared for by the company, it comes with two years of parts replacement warranty.

What we like and don’t like!


  • Easy to set temperature.
  • Freeze protection technology for the best output in winter.
  • No special LP gas lines are required.
  • Quite and brushless motor.
  • Energy saving.
  • On-board monitor.
  • Lightweight and easy to move.


  • The water pressure is low.
  • Poor design.

5. Excel Tankless LPG Gas Water Heater

Coming with exclusive technology that ensures that you can start your water heater only with 2 psi of water and range up to 120 psi, Excel Tankless LPG Gas Water Heater is your ideal RV tankless water heater. This all-rounder tankless water heater can be used in flats, apartments, cabins, boats and also in mobile homes. Having a unique beautiful design, this is great for adding beauty to your laundry room or kitchen. Being a vent-free system, this can back up your entire home. Installing Excel Tankless LPG Gas Water Heater is very easy. It can be mounted on your wall. However, you need 2 “D” size batteries which you will find included with this unit.


Water Flow Rate: With a water consumption rate of 1.6 GPM, you will also get a similar output in the water flow rate.

Power Source: You need to use Propane LPG gas as the power source.

Dimensions and Weight: Featuring a dimension of 18 x 7 x 14 inches, it has got a weight of 20 pounds. This is one of the most lightweight tankless heaters out there in this category.

Water Pressure: Starting with a water pressure of 2 psi, it can go up to 120 psi when necessary.

Color and Shape: It comes in white color and got rectangular shape.

Batteries: For outdoor use, you need two size D batteries of Alkaline type. You will get these covered inside the package. It is expected that you will have a battery life of about 180 days.

What we like and don’t like!


  • Low water pressure startup technology is used along with other upgraded systems.
  • Great RV tankless water heater for cabins, sailboats, apartments, mobile homes.
  • Oxygen depletion safety shut off technology.
  • Easy to install. No plumber required if you have some little knowledge about how to set.
  • Suitable for multiple points of use.
  • Copper heat exchanger with a lifetime warranty.
  • You do not need to buy any expensive flue.
  • No need to have a pressurizer.


  • A little interruption of gas flow easily affects the flame.
  • Does not output very hot water.

6. Eccotemp L10 2.6 GPM Portable Tankless Water Heater [Best RV Tankless Water Heater]

When you come out from hasty outdoor activities, be it hunting, or sporting, you need some hot water to take a fresh shower. If you have got Eccotemp L10 installed in your home, you will have nothing to worry about. It will supply you on-demand water whenever and wherever you want. Being run by 2  “D” size batteries, it can ensure you with water of up to 3 GPM. Along with electric ignition and easy installation system, you can also experience a temperature level that begins from 50 and goes up to 140 degrees Fahrenheit. Though this shower is designed for camping, small cabins, and people who move from one place to another frequently, the water supplied by it can also be used to wash your dogs and cats.


Water Flow Rate: When it comes to water flow rate, Eccotemp L10 can supply hot water up to 3 GPM with water consumption of 2.6 GPM.

Power Source: This unit is backed up by 2 “D” batteries. So, you can use or carry it anywhere. You will have a great advantage using it if you are living in an area without sufficient electricity supply.

Dimensions and Weight: Coming with a dimension of 15 x 6.5 x 35 inches, it weighs only 27 pounds.

Water Pressure: The water pressure of Eccotemp L10 starts in 20 psi and can reach up to 80 psi.

Color: This unit of RV tankless water heater is white in color.

Batteries: You will require batteries to run it. However, those are not included with this package. You have to buy them separately.

Warranty: For this heater, you will get a warranty period of 1 year.

What we like and don’t like!


  • Frustration-free packaging with accessories.
  • Great for people who go camping frequently.
  • Stainless steel hose.
  • Shut-off timer to ensure safety.
  • An easy temperature control system.
  • Easy to carry anywhere.
  • Ideal for washing your pets.


  • The temperature adjustment knobs are prone to break.
  • Tough to put things together.

7. Camplux 10L Tankless Water Heater

Be it the outdoor shower, bathing horses or washing dogs, Camplux 10L Tankless Water Heater can cover these all, Being a lightweight and portable RV tankless water heater, this water heater is run by batteries. If you have got a small cabin or you are in a campsite, you can try this once. With an operating range of 2.8-110 psi, enjoying a great hot bath will not be something difficult. With advanced modern technologies, it ensures that you are using the unit with safety. Though this is designed for outdoor, you just need a flue pipe or duct along with proper ventilation if you want to install it indoors. With lithium cell batteries, you can expect a service of 180 days with a set of batteries.


Water Flow Rate: Camplux 10L comes with a water flow rate of 2.64 gallons per minute. This is quite enough for you to bathe and meet your demand.

Power Source: Being backed up 2 D cell batteries, 3 volts, and 20KW wattage, it provides a very good service in the places where electricity is not available readily.

Dimensions and Weight: Camplux 10L offers a great dimension of  21.6 x 12.9 x 8.3 inches with a weight of 18.08 pounds.

Water Pressure: When it comes to water pressure, this unit of water heater uses 2 to 110 psi.

Color and Shape: Being white in color, this is rectangular in shape.

Portability: This unit is easily portable and movable.

What we like and don’t like!


  • Can save your money with a high thermal efficiency technology.
  • Doesn’t occupy a lot of space like many traditional ones.
  • 68,000 maximum power output per hour.
  • Energy-saving.
  • Lightweight and compact design.
  • Made of iron, metal, and copper.
  • Portable.
  • Can be installed both outdoor and indoor (with proper instruments).


  • May get damaged easily if splashed by the rainwater.
  • Poor consumer service.

8. EZ 101 Tankless Water Heater – Propane (LPG) – Portable – Camping – RV

Coming with a simple and minimalist design EZ 101 Tankless Water Heater is one of the best from the EZtankless models. Made for camping and outdoor lovers, this is small and easy to install. You do not need any electric connection to use it, as just standard LP gas can back this up. If you are in hunting expedition or camping to a new place, this EZ 101 can come to you like the blessing of having hot water any time you come back from your journey.

You can also choose this for small homes or cabins, barns or workshops. However, just ensure that there is excellent ventilation to keep it working for years. If you are living near the lake with one bath, this is just about perfect for your comfort. You can easily operate this unit with the help of a garden hose inlet water supply. As it comes with ‘no pilot’ and auto-ignition, you can rest assured that it will save energy for you. If you do not have electricity supply where you are living, this is the unit that you should install right away.


Power Source: You need two D cell batteries to operate it. However, batteries are not included in this package. So, you have to buy it separately.

Weight: EZ 101 is one of the lightest tankless water heaters manufactured by the companies of this industry. When it comes to weight, it is only 14 LBS.

Color: This unit comes in white color.

Portability: EZ 101 is easily portable and can be used in fishing and hunting place. Wherever you need hot water, you may carry it with you.

Warranty: This mode of EZ tankless comes with a warranty period of 1 year.

What we like and don’t like!


  • Easily portable.
  • Can be installed without much ado.
  • An ideal choice for anyone who loves camping and outdoor activities.
  • Only batteries and LP gas are required to operate it.
  • Can also be used indoor.
  • Great for homes with 1 bath, or small cabins.
  • Perfect for areas with scarcity of electricity .


  • It is  not capable of supplying extremely hot water if the temperature is low.
  • Does not come with a propane regulator.

Things to consider before buying the Best RV Tankless Water Heater 

Finding the best RV tankless water heater can be difficult. As choice and preference vary from person to person, you need to set your own preference first as per your budget. However, these are the things you should look to buy the best RV tankless water heater.

Warranty: If your RV tankless water heater comes with a warranty, it means that the manufacturer is confident about their product and willing to serve you in case of any issues. It is always better to find an RV tankless water heater that comes with a good warranty period than that of one without a warranty.

The Suitable Size: You have the liberty to choose from a variety of sizes. It all depends on your needs and budget. However, if you want your RV tankless water heater to cover more than one or two, you should choose one that can satisfy the need. If you choose one of smaller size, that will fail to provide you enough water and you choose the one that is larger than you need, it will cost you more energy and expense at the end of the month.

Portability: Whether your RV tankless water heater is easily portable or not makes a huge difference. If your tankless water heater is heavy, that will make you sweat to move. But, fortunately, most of the RV tankless water heater we have covered here are easily portable to serve you anywhere you want.

Water Consumption: Before going to buy RV tankless water heater, you should know the estimated water consumption to get an idea about the actual size of the water heater. Usually, we need 1 to 3 gallons of water per minute in our shower. When it comes to the toilet and bathtub, it can range from 2 to 4 gallons per minute. So, before buying your RV tankless water heater, you have to calculate the consumption first and then go for one that can supply with the necessary amount of water per minute you need in your entire home.

Water Pressure and Flow Rate: The water pressure or PSI denotes the capacity of your RV tankless water heater. Flow rate also signifies how quickly you get your water ready to use. The better the water pressure and flow rate is, the better the RV tankless water heater is. So, choose one with high water pressure and flow rate.

BTU: By BTU or British Thermal Unit, we understand the heating capacity that a water heater can provide. If you need the BTU of your water heater unit, you can determine how much heat you need to get your hot water. You need to know it due to the difference in temperature of the groundwater difference. Most of the time, you may experience a BTU that ranges from 20,000 to 50,000 or more per hour.

Weight: If your RV tankless water heater is weighty, it can be difficult to carry that to places. So, choose one that is very handy and lightweight. To be frank, as RV tankless water heaters are made to be easily carried, you will find most of them to be light and flexible.

Battery Backup: Having a good battery backup is very important. Most of the RV tankless water heater uses 2 “D” sized batteries to work. You should choose batteries from the good brands so that they last for long.

Advantages of RV Tankless Water Heater

There are many advantages of RV tankless water heater which have contributed to its popularity. Some of the core advantages of using RV tankless water heaters are as follows:

Endless Hot Water

RV tankless water heater does not restrict your water consumption. You can enjoy an unlimited flow of hot water which is way better than any typical water heater with the tank.

No worry

With a tank water heater, you may get worried about any leakage and flooding on the floor. But with RV tankless, you are from any issue like this. So, it can be said to be safer.

No Pilot Light

As electric ignition is used in most of the RV tankless nowadays, you do not need pilot light of the old generation.

Compact Design 

Most of the RV tankless water heaters come with a neat and compact design. As they do not occupy much space, you can easily put them even if you have got a small home.

Convenient to Handle and Use

As RV tankless water heaters are very lightweight, you can easily carry them anywhere you want. Installation is also easy compared to tank water heaters.

Having Control 

When it comes to getting hot water at a comfortable level, the ability to set the temperature is important. With RV tankless, you can set the water temperature from a range of low to high. So, it is no more a big deal if your wife expects hot water and you want lukewarm water for bathing.


A water heater with a tank unit does not last as long as RV tankless water heater. Most of the RV tankless comes with a life expectancy of more than 10 years. Tank systems may corrode easily, but RV tankless water heaters are not that fragile.

Frequently Asked Questions (FAQ)

How can I install the RV tankless water heater unit?

Installing a water heater involves several tasks. You may need to mount the unit, connect the gas, electricity and water line. If you have some experience of doing this kind of technical work before, you should follow the manual provided with the unit. However, if you are not a technical guy, you should hire a certified and professional plumber.

Does an RV tankless water heater cost much?

No, most of the RV tankless water heater is not going to within a range of 500$ to 1000$. You can get one even cheaper than this.

How many years does an RV tankless water heater last?

From a tankless water heater, you may get up to 5 to 10 years of life period.

How to use the RV tankless water heater for the first time?

First of all, you have to fill the water heater with water. Then, you have to connect the lines. However, refer to the guidelines provided by the manufacturers to use your tankless water heater properly.


Final Thoughts

Now that you have got a list of best RV tankless water heater and know the secrets of how to buy your desired tankless water heater, we hope that you would take your decision wisely. We respect your choice and criteria for buying your water heater. We have reviewed these products with a pure intention of helping you. However, we always encourage you to take time and make your decision.