7 Best RV Tankless Water Heaters of 2020

Best RV Tankless Water Heater

When you are out camping, it is important that you get hot water in your RV. Especially if you are out with a few people and the weather is cold.

However, the main problem with the inbuilt tank of the RV is that it is limited in capacity and most RV tanks can hold only 5 to 10 gallons of water. This is not enough for those camping in a small group.

This is where the RV tankless hot water heater comes into play. It will allow you to heat an unlimited supply of water from any source in a matter of seconds.

Now, you can enjoy the hot water at any time of the day and not worry about water capacity anymore.

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PRODUCT

​FEATURES

Bosch Tronic 3000T ES8 Electric RV Tankless Water Heater

1. Bosch Tronic 3000T (Small and Compact)

  • Small and compact. Does not take a lot of space
  • Can heat water quickly and efficiently
  • Has wall mounts at the back for easy installation
  • Available in different capacities
EcoSmart 11 Electric RV Tankless Water Heater

2. EcoSmart ECO 11 (Available in Different Sizes)

  • Comes in different sizes and capacities
  • Front digital display
  • Water temperature and flow can be controlled
  • Versatile. Can be used anywhere
Camplux 5L 1.32GPM Portable RV Tankless Water Heater

3. Camplux AY132 (Affordable and Good Value)

  • Affordable and value for money
  • Can work with low water pressure
  • Efficient heater with many modern technologies
Girard 2GWHAM On-Demand RV Tankless Water Heater

4. Girard 2GWHAM (Efficient and Excellent Build Construction)

  • Durable and quality build construction
  • Efficient and silent operation
  • Easy to install
Eccotemp L10 Portable RV Tankless Water Heater

5. Eccotemp L10 (Heavy-duty and High-Water Flow Rate)

  • High flow rate of 2.6 GPM
  • Easy to adjust flow rate and temperature
  • Works perfectly with a low water pressure
Excel RV Tankless Water Heater

6. Excel 10016 (Works with Low Water Pressure)

  • Requires only 2 PSI of water to function
  • Lifetime warranty
  • Higher than average flow rate of 1.6 GPM
PrecisionTemp RV-550 Tankless Water Heater

7. PrecisionTemp RV-550 (Small but Highly Performing)

  • Small but heavy-duty in operation
  • Excellent build construction. Durable and long-lasting
  • Water temperature can easily be adjusted

PRODUCT

1. Bosch Tronic 3000T 

(Small and Compact)

Bosch Tronic 3000T ES8 Electric RV Tankless Water Heater
  • Small and compact. Does not take a lot of space
  • Can heat water quickly and efficiently
  • Has wall mounts at the back for easy installation
  • Available in different capacities

2. EcoSmart ECO 11 

(Available in Different Sizes)

EcoSmart 11 Electric RV Tankless Water Heater
  • Comes in different sizes and capacities
  • Front digital display
  • Water temperature and flow can be controlled
  • Versatile. Can be used anywhere

3. Camplux AY132 

(Affordable and Good Value)

Camplux 5L 1.32GPM Portable RV Tankless Water Heater
  • Affordable and value for money
  • Can work with low water pressure
  • Efficient heater with many modern technologies

4. Girard 2GWHAM 

(Efficient and Excellent Build Construction)

Girard 2GWHAM On-Demand RV Tankless Water Heater
  • Durable and quality build construction
  • Efficient and silent operation
  • Easy to install

5. Eccotemp L10

 (Heavy-duty and High-Water Flow Rate)

Eccotemp L10 Portable RV Tankless Water Heater
  • High flow rate of 2.6 GPM
  • Easy to adjust flow rate and temperature
  • Works perfectly with a low water pressure

6. Excel 10016 

(Works with Low Water Pressure)

Excel RV Tankless Water Heater
  • Requires only 2 PSI of water to function
  • Lifetime warranty
  • Higher than average flow rate of 1.6 GPM

7. PrecisionTemp RV-550 

(Small but Highly Performing)

PrecisionTemp RV-550 Tankless Water Heater
  • Small but heavy-duty in operation
  • Excellent build construction. Durable and long-lasting
  • Water temperature can easily be adjusted

1. Bosch Tronic 3000T – Small and Compact

Bosch Tronic 3000T ES8 Electric RV Tankless Water Heater

Photo: Bosch

  • Power source: Electricity
  • Capacity: 2.5 gallons, 4 gallons, and 7 gallons

The Bosch Tronic 3000T is a small and compact electric tankless heater for RV. Indeed, this mini water heater uses 120 V and 12 A to heat up the water and it is very efficient in operation. This is not a problem as most RVs are able to output this type of power capacity. 

In addition, this model has a power capacity of 1440 Watts which makes it a very powerful water heater that can even rival the capacity and power of your home electric shower water heater.

Indeed, it’s capacity of 7 gallons makes it able to have a constant reserve of hot water so you do not have to wait for the Bosch Tronic 3000T to heat the water. Therefore, it creates a seamless shower experience. Simply turn this mini-tank water heater on and you will instantly get hot water.

One of the best things about this model is that it can be installed both horizontally and vertically for more installation flexibility.

When installed horizontally, it has a 5.1 gallons water capacity and vertically, a 7 gallons capacity. Furthermore, there are dedicated wall mount brackets at the back for an easy installation.

The only caveats we note with this top-rated RV tankless water heater is that it may not be as durable as other models and it requires a fair bit of electricity to work.

Pros:

  • ​Small and compact design. Does not take a lot of space in the shower room
  • Able to heat up the water very quickly
  • Available in 3 different sizes, 2.5 gallons, 4 gallons and 7 gallons
  • Wall brackets at the back for installation

Cons:

  • Requires a lot of electricity to work correctly
  • A few customers have complained about durability

2. EcoSmart ECO 11 – Available in Different Sizes

EcoSmart 11 Electric RV Tankless Water Heater

Photo: EcoSmart

  • Power source: Electricity
  • Water flow: 1.5 GPM
  • Capacity: 2 gallons, 2.5 gallons, 3 gallons, and 3.5 gallons

The EcoSmart is a popular model that is highly rated by many electric RV tankless water heater reviews online. The reason is quite simple. This model simply works and comes in a wide range of styles and sizes to suit your need and purpose.

The EcoSmart 11 can heat up to 1.5 gallons per minute which is more than enough for a casual shower. In addition, this model uses internal technologies that allow you to save more water and therefore, greatly increases the efficiency of this electric heater. In fact, the manufacturer claims that it can save you up to 50% of your water heating costs.

Note that this is a 240 V electric water heater and you will need a converter if you RV outputs 120 V to make this unit operational. But one of the best things that we like about this product is that it works just like a regular shower providing you with a lot of control over the water temperature as well as over the water flow.

All in all, if you need a 240 V electric heater for you RV, the EcoSmart 11 is one of the best electric RV tankless water heater especially that it can be used in the home as well. We highly recommend it even if the price is a little high.

Pros:

  • Available in a wide range of styles and sizes
  • Digital panel for temperature display
  • Provides you with a lot of control like water temperature and water flow
  • Can be used anywhere, from home to RV use

Cons:

  • The price could have been a little bit more cost-effective
  • Uses 240 V to work

3. Camplux AY132 – Affordable and Good Value

Camplux 5L 1.32GPM Portable RV Tankless Water Heater

Photo: Camplux

  • Power source: Propane Gas
  • Water flow: 1.32 GPM
  • Capacity: 1.32 gallons

The Camplux is a propane RV tankless water heater that uses regular propane gas as a power source. One of the main advantages of this is that it is a cheap source that will not cost you too much as it is quite affordable.

In addition, the manufacturer made it so that you can purchase the Camplux in different numbers, up to a pack of 20 if you need that many. However, it will cost you. What we like about this tankless water heater is that it comes with many technologies inside that makes it an extremely efficient model to use.

Indeed, it has a flame failure mechanism that will automatically shut off the water heater in case of misfire. Additionally, the anti-freeze protection makes it an efficient water heater to run during a cold winter.

With its 1.32 GPM water flow, this model is able to provide you with a constant flow of water and will work efficiently even if you have a low water pressure, as this water heater can work with a minimum of 2.5 PSI water pressure.

The only caveat with this unit is that the build construction could have been a little buit better. However, considering its very affordable price, this is easily forgivable and most RV propane tankless water heater reviews online rate it quite highly.

Pros:

  • Affordable. Value for money
  • Able to work with a low water pressure
  • Equipped with many technologies that make it run very efficiently

Cons:

  • Not the best build construction quality

4. Girard 2GWHAM – Efficient and Excellent Build Construction

Girard 2GWHAM On-Demand RV Tankless Water Heater

Photo: Girard

  • Power source: Propane Gas
  • Water flow: 1.5 GPM
  • Capacity: 1.5 gallons

The Girard 2GWHAM emphasizes on build quality and efficiency. The fittings in this water heater have been made in such a way that it will universally fit any type of RV plumbing.

Best of all, there is a wide range of user options on this tankless water heater, including, of course, the ability to adjust the temperature of the water as well. Additionally, the metal build construction of this minimalist water heater is excellent.

Furthermore, it uses a brushless motor that is extremely silent and vibration-free. You will almost not here this model run during operation.

Moreover, installation is extremely easy in this model and everything is clearly marked. Even if you have never installed or done RV plumbing before, you will have no problem installing the Girard 2GWHAM in an hour or 2.

Although, keep in mind that this model does not come with an external control system so it is more difficult to operate that your average electric heater. Also, it is more expensive considering its water flow rate and capacity.

But despite all those, the Girard remains one of the best on demand RV tankless water heaters on the market. Especially when it comes to efficiency and build construction.

Pros:

  • ​Good build construction
  • Efficient and silent operation with no vibrations
  • The outer shell is made from durable and corrosion-free metal
  • Easy to install by even absolute beginners

Cons:

  • No external controls. More difficult to make adjustments when compared to other models
  • The price. It is expensive

5. Eccotemp L10 – Heavy-duty and High-Water Flow Rate

Eccotemp L10 Portable RV Tankless Water Heater

Photo: Eccotemp

  • Power source: Propane Gas
  • Water flow: 2.6 GPM
  • Capacity: 2.6 gallons

The Eccotemp L10 is a heavy-duty RV tankless water heater that runs with propane gas. One of the best features of this model is that it can work with a low water pressure of 20 PSI and due to its high water flow of 2.6 GPM, this water heater is able to heat water in a matter of seconds. There is simply no wait time with this unit.

Best of all, installation is quite easy as everything is clearly marked. Although, we recommend that you get the job done by a professional for safety reasons. At the top of the Eccotemp L10 is a large exhaust that will get rid of all dangerous gases produced by the water heater during operation.

Additionally, this model has a safety shut off feature that will automatically turn of the water heater after 20 minutes of use. This makes it an ideal water heater not only for RVs but for home as well. It is definitely one of the best RV instant hot water heater out there.

However, it may be difficult to get a warranty on this heater if you get a defective model. But on the plus side, it as a decent and tough build that limits of risk of it getting defective in the immediate future.

Pros:

  • The high water flow of 2.6 GPM. Can heat a lot of water very quickly
  • The water flow and water temperature can easily be adjusted outside the unit
  • Flexible. Can be used both in the RV or at home as well
  • Able to work with a low water pressure of 20 PSI

Cons:

  • Difficult to get warranty on this heater

6. Excel 10016 – Works with Low Water Pressure

Excel RV Tankless Water Heater

Photo: Excel

  • Power source: Propane Gas
  • Water flow: 1.6 GPM
  • Capacity: 1.6 gallons

This tankless water heater from Excel is a high-quality model that uses propane gas as a power source. But one of the most interesting features about this unit is its ability to work with a very low water pressure of only 2 PSI.

With such a low water pressure working ability, you do not need a pressurized pump which will greatly save you on the cost of electricity when running this tankless water heater. In addition, what we like about this model is that it comes with a lifetime warranty.

Moreover, the water flow of 1.6 GPM makes this unit more than decent even when used by a small family in an RV. If you’re looking for a reliable model that comes with a lifetime warranty, then this model from Excel is one of the best RV tankless water heaters that you can currently buy.

The only caveat we find here is that the top exhaust design is fairly poor. It could have been better implemented as it is difficult to evacuate exhaust fumes from it.

Pros:

  • Able to work with a very low water pressure of 2 PSI. Does not require a water pump
  • Comes with a lifetime warranty
  • The decent water flow of 1.6 GPM

Cons:

  • The top gas exhaust could have been better designed

7. PrecisionTemp RV-550 – Small but Highly Performing

PrecisionTemp RV-550 Tankless Water Heater

Photo: PrecisionTemp

  • Power source: Propane Gas
  • Water flow: 1 GPM
  • Capacity: 1 gallon

The PrecisionTemp RV-550 is a small and minimalist tankless water heater that does not require a lot of space to work. In fact, the manufacturer claims that this model works similar to 10 gallons tank but requires half the space.

Best of all, this model is made in the USA and there is a strict quality control which ensures that you are getting the best quality tankless water heater for the money.

This model has been designed in a way that it is very flexible and you will be able to use it almost anywhere, from an RV to even as a regular shower water heater in your home.

If you need a small and yet reliable tankless water heater, the PrecisionTemp RV-550 is rated by many as being one of the best RV tankless water heater based on a size to performance ratio.

Just keep in mind that this model is more difficult to install that most other models we have reviewed so far. Also, the water flow of 1 GPM means that this model will have difficulty powering larger shower heads like a large rainfall shower head.

Read More: 12 Best RV Shower Heads

Pros:

  • Small size and yet highly performing. Heavy-duty
  • High-quality water heater built from quality materials. Durable and long-lasting
  • Equipped with technologies like VariFlame for adjusting the water temperature

Cons:

  • Since this is a wall vented water heater, installation can be difficult for beginners
  • Smaller water flow when compared to other models

How to Buy the Best RV Tankless Water Heater

​How to Buy an RV Tankless Water Heater

Photo: bohohobos.com

1. Power source

The power source is the most important consideration when purchasing an RV tankless water heater. Most water heaters run on either electricity or propane gas. If you RV is able to output either 120 V or 240 V with high amperage, then an electric water heater makes a lot of sense.

On the other hand, for more flexibility, a propane gas tankless water heater is cheaper to run in the long term. However, it will require the purchase of at least a 20 lbs propane tank for it to work.

2. Capacity

The capacity is simply the amount of water that the tankless water heater can heat before you start getting cold water. If you want to get a reliable and efficient water heater, a capacity of 1.2 gallons or more is what you should aim for.

3. Water consumption

When camping in an RV, water is a big issue because it is extremely precious and you do not want to waste it.

Therefore, it is important that your tankless water heater remains respectful of your water reserve and consumes as little water as possible.

Thankfully, there are many models that are highly efficient and able to work with a low water pressure and helps you save up to 50% on your water output.

4. Water flow

In a tankless water heater, the water flow is measured in GPM (gallons per minute). The higher the water flow, the more heavy-duty and powerful the tankless water heater will be as it is able to heat more water in less time.

However, the caveat with a high GPM is that it consumes more electricity or propane gas depending on your power source.

Therefore, you need to find the right balance between power consumption and GPM. In general, a GPM of 1.2 to 1.8 is more than enough for an RV tankless water heater.

5. Price

When purchasing a top-rated RV tankless water heater, it is important to make a budget and then stick to this budget. Thankfully, this device remains quite affordable for an RV accessory and you can get a high-quality model for less than $300.

6. Storage Space

The storage space is possibly one of the most important factors to consider. Especially considering that the RV is generally limited in space and that your RV shower area is most likely even more constricted.

Luckily, RV tankless water heater technologies have advanced so much that you can now get a very performing water heater that consumes half the space of a regular shower heater for almost the same performance.

7. Easy to install

If you are planning to install your RV tankless water heater yourself, then it is important to pay attention to how easy it is to install this device.

To make it as easy as possible to install, ensure that your tankless water heater has wall brackets as well as clearly marked water inlet, outlet and power source for the connections.

In addition, if you do not have experience installing an RV tankless water heater, then you should stay away from models that state that they are “wall vented”.

In general, this will imply that you will need to cut your RV wall for the outlet. It is best to stick with a model that has wall brackets as this is by far the easiest RV tankless water heater to install.

Conclusion

As we have seen, the tankless water heater allows you to heat an unlimited supply of water quickly and easily. This is ideal for those who are out camping in a small group and need to regularly use the shower.

Best of all, the tankless water heater is most of the time maintenance-free an extremely easy to use, similar to your regular shower water heater at home.

Finally, if you have still not found a great model in our RV tankless water heater review above, then you may have missed something. We recommend that you go through it one more time.


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