Best Electric Tankless Water Heater for RV – Tankless RV Hot Water Heater Camper

What is the best RV tankless water heater? Traveling in an RV is always a pleasurable activity what with all the comfort it provides. Despite that, there are still some features in RVs that are unavailable like a supply of hot water.

You could always heat up water, but it’s certainly burdensome to do it every day. This might not also be enough for lengthy and numerous showers and baths.
Using an RV tankless water heater solves the problem. By tapping on the hot water tap, this device will provide you with hot water on demand. Moreover, this unit is also sleek and compact since it lacks a storage tank.

Because of their popularity, there are numerous types and designs to choose from. This guide has all the information you will need regarding RV tankless water heaters. It also includes a review section which lists the best water heaters currently in the market as well as a problems section to help you out in the future.

Best RV Tankless Water Heater Reviews

Girard GSWH-2 Tankless Water Heater

Girard GSWH-2n

The Girard GSWH-2 tankless water heater comes in modern design with a white finish. It features a freeze-protection design which makes it suitable for winter use. It is also very well-made, with a quiet brushless motor, designed for your comfort.

Measuring 15.5 inches in length, 22.5 inches in width and 12.5 inches in height, the GSWH-2 water heater can comfortably fit inside your RV home. With a weight of 21.2 pounds, it is also easy to carry and move around.

What I like the most about the Girard GSWH-2 tankless water heater is its heating capacity. This propane water heater has 42,000 BTUs of heating power which is more than enough to suit most RV needs.

Moreover, the GSWH-2 water heater is equipped with a microprocessor that regulates water temperature. With this, the device can always consistently and quickly provide hot water.

Another thing I like about this product is that it is also easy to install. For one, it doesn’t require any special gas line and can run on 12v of power.

Despite all its features, this tankless water heater has a low water flow rate. Nevertheless, this product is still a good buy considering its performance.

Atwood Tankless Water Heater

Atwood Tankless Water Heater

The Atwood tankless water heater is a product made with safety and durability in mind. Armed with aluminum-clad tanks, this water heater is protected from corrosion and similar damages.

The water heater also has its own pressure relief switch and a temperature control for added safety.

Moreover, it comes with its own door that protects its delicate inner parts. The door also enables the user to use the tankless water heater both indoors and outdoors.

Excel Vent-free Tankless Propane Water Heater

Excel Vent-free

The Excel tankless water heater comes in a rectangular design and white finish, making it one of the most stylish water heaters in the market. Measuring only 18 x 7 x 14 inches and weighing 20 pounds, this water heater is one of the lightest and most compact. Many users mounted it onto walls.

What I like the most about the Excel tankless water heater is its excellent system. With a range of 2 psi to 120 psi, this water heater is easy and convenient to use. Moreover, the system features a 1.6GPM water flow and heating capacity which is more than enough to meet your daily needs.

Another thing I like is that it enables the user to control and adjust the unit’s water flow due to its magnetic flow sensor. With this, you can control how much water you can consume in a day.

You can also use this water heater outdoors and it even comes with 2 D alkaline batteries for this purpose.

It runs on propane. Its interruption can affect its flame. Sometimes, it can deliver lukewarm water.

Suburban Tankless Water Heater

Suburban Tankless Water Heater

Suburban Manufacturing is a well-known name when it comes to RV heating products as well as water heating products and cooking appliances. One of its most recommended products is the Suburban SW6DE tankless water heater.

What I like the most about the SW6DE tankless water heater is its durable, long-lasting but simple design. It features a one-piece, die-formed housing which protects its parts from scratches, temperature and other similar factors. This protection is further strengthened by anode rods that are designed to absorb the corrosive effects from electrolysis.

Not only that, the water heater’s housing also makes it easier to access the heater for repairs and other maintenance work.

Moreover, the SW6DE tankless water heater is also quite compact. Measuring 25 x 19 x 18 inches, it doesn’t take up a lot of space inside your RV.

Another thing I like about the Suburban SW6DE tankless water heater is that it comes with a heating capacity of 12,000 BTUs. This capacity is sufficient to meet most daily needs.

This tankless water heater runs on propane gas and doesn’t require any electrical power source. This makes it convenient to use, especially when you’re in an area with limited to nonexistent electrical sources.

However. It is bulky and heavy. It is difficult to move because it is 32.1 lbs.

Tengchang TCMT Tankless Hot Water Heaters

Tengchang TCMT

Tengchang is a popular company known for its affordable and efficient propane and gas water heaters. One of its most recommended products is the Tengchang TCMT tankless water heater.

The TCMT tankless water heater comes in a thin rectangular design. Not only is the product compact and space-efficient, but it is also very stylish and modern, making it a good addition in your RV home. It’s also very light, weighing only 8.5 kgs.

What I like the most about the Tengchang TCMT tankless water heater is its energy-efficiency. This propane water heater comes with a heater exchanger and main burner to decrease gas consumption as well as reduce running noise. With this, it boasts an 80% energy-efficiency rate.

Moreover, this indoor unit can still be used even in low water pressure due to its water control linkage valve. As such, you’ll have a consistent supply of hot water.

Another thing I like is that it comes with safety features. It comes with a 20-minute self-timer as well as a flame inspection system for the user’s protection and safety.

This unit is not powerful. It might not deliver a large amount of heated water when used simultaneously.

PrecisionTemp RV-550 Tankless Water Heater

PrecisionTemp RV-550

The PrecisionTemp RV-550 tankless water heater boasts a durable and long-lasting design. With built-in freeze protection, you can safely use the water heater in any season. It also operates quietly, making it more comfortable for the user.

Measuring 13.5 x 13.5 x 14.25 inches and weighing 32 pounds, this water heater is light and compact. In fact, for its size, it only takes up half of the space and weighs only a third of a 10-gallon tank. The user even has the option of mounting the product to the wall.

What I like the most about the RV-550 tankless water heater is its efficient system. Having a heating capacity of 55,000 BTUs, it has one of the highest hot water outputs in the market. It also comes with an automatic gas modulation feature which enables the device to adjust its gas usage based on the water’s temperature. This, along with its 1.5 GPM water flow rate, you’ll have a consistent supply of hot water in your RV.

I also like how the PrecisionTemp RV-550 tankless water heater is very energy-efficient. It only requires 1.5 amps of power usually and about 3 amps when the cold weather protection is turned on.

Some reported it takes time to heat the water. Moreover, there are times when it delivers too-hot water.

Camplux AY132S 5L Portable Propane Tankless Water Heater

amplux AY132S

Camplux is a company that specializes on camping products which includes tankless water heaters. One of their most well-known and loved products is the Camplux AY132S tankless water heater.
Measuring 11.42 x 4.33 x 14.8 inches and weighing just 14 pounds, this tankless water heater is one of the most compact and lightest models in the market. With this, you can easily install and move this product around. Not to mention, it features a stylish rectangular design that can fit any RV home.

What I like the most about the Camplux AY132S water heater is its smooth performance. With a heating capacity of 28,000 BTUs, this water heater can provide 1.32 gallons of water per minute. With this, you’ll have enough hot water for your daily needs.

I also like how its very energy-efficient with a rate of 11.5%. It has one of the lowest water pressure start-up range of 3.0 PSI to 110 PSI.

Another thing I like about the Camplux AY132S is its attention to safety. With a plethora of safety features ranging from protection against dry combustion, flame failure, overheating, low-water flow, high-water pressure, etc. It also has an auto off-switch when it detects these problems. It’s not for indoors. It requires ventilation if used indoors.

EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11

The EcoSmart ECO 11 tankless water heater features a rectangular shape and stylish white finish that can go well in any RV home. A compact unit and weighing only 6.5 pounds, the ECO 11 is one of the lightest water heaters in the market. This makes it easy to maneuver and install the item.

What I like the most is its 99.8% energy-efficiency rate due to its patented self-modulating technology. With this, it only requires 13kw at 240 volts to start and has an activation flow of 0.3 GPM.

The EcoSmart ECO 11 tankless water heater is also efficient and very user-friendly. The system can quickly heat up 2 gallons of water per minute which is more than enough to meet your daily needs.

Moreover, it comes with a digital temperature control feature. With this, the user can easily adjust the water’s temperatures by one-degree increments. With this, you can cater to your preferences and fashion the device to set the temperature just the way you like it.

The ECO 11’s smart technology is for places with 67 degrees F water temperature. It does not heat up many fixtures simultaneously. Take note of it.

Bosch Tronic 3000 Mini Electric Tankless Water Heater

Bosch Tronic 3000

Made of premium glass-lined material, the Bosch Tronic 3000 tankless water is built to last. With this material, the product is protected from various elements and makes it easy to repair and maintain.

One thing I like about the Bosch Tronic 3000 is that it’s easy to install. Measuring only 13.75 x 13.75 x 13.5 inches and weighing 17.3 pounds, the unit is compact and lightweight. It features a small rectangular design which makes it easy to fit it under your sinks or mount it into your walls and floors.

This water heater also enables independent installation. It comes with cord plugs that the user can plug into a 120v outlet or in-line with a hot water source.

Another thing I like about this product is its reliable performance. With a 4-gallon capacity, this water heater can supply enough hot water for up to 2 sinks. Its also very energy-efficient with a rate of 98%.

Among similar products, the Bosch Tronic 3000 has the fastest recovery of 6.8 GPH. With this, you’ll have a consistent supply of hot water.

However, some reported quality issues on this unit. Check your package for customer support immediately.

Eccotemp FVI12-LP Tankless Water Heaters

Eccotemp FVI12-LP

The Eccotemp FVL12-LP heater features a sleek rectangular design and comes in two colors: black and white. Measuring only 25 x 15 x 6 inches, it’s compact and doesn’t take up a lot of space. With this, it’s a great addition to any RV home.

What I like about the Eccotemp FVL12-LP tankless water heater is its system. It comes with a temperature digital display which makes it very convenient. Moreover, it doesn’t produce a lot of noise when operating.

This tankless water heater is a manual heater which means that the user can easily adjust the water’s temperatures in accordance to their preferences. This unit has knobs to adjust water flow and gas pressure.

I also like how the FVL12-LP tankless water heater is very efficient. For its small size, it supplies an impressive flow rate of 4 GPM while only consuming 3.5 GPM. With this, you can get a consistent supply of hot water. This unit can operate with a maximum of 80,000 BTUs and between 50- and 140-degrees F.

However, the Eccotemp FVL12-LP offers a small output for its small size. Inconsistent performance can be an issue with this unit.

What is the Best Tankless Water Heater for RV?

best rv tankless water heater

The PrecisionTemp RV-550 tankless water heater may be the best. This product has the highest capacity of all the products listed. It offers 55,000 BTUs heat capacity and 1.5 GPM flow rate. It features a very durable design, enabling the user to use it in any season.

Not to mention, the RV-550 tankless also delivers an excellent and consistent performance. Out of all the products listed, it has the highest heat capacity of 55,000 BTUs and a decent flow rate of 1.5 GPM. With this, the user can have a consistent supply of hot water for their daily needs.

The PrecisionTemp RV-550 tankless water heater is also notable for its smart technology and energy-efficiency. With its gas modulation feature, the unit can automatically adjust its gas usage according to the water’s temperature. Activating the cold protection, it requires only three amps. For normal usage, it needs only 1.5 amps.

The Girard GSWH-2 tankless water heater is second. With a heat capacity of 42,000 BTUs and a temperature-regulating microprocessor, this unit also gives users more than what they paid for. With this product, you’ll get hot water whenever you demand.

The Camplux AY132S tankless water heater is third tankless water heater. While it may have a smaller heat capacity of 28,000 BTUs, it’s still nevertheless an impressive unit. It features a sleek and stylish look as well as a consistent and smooth performance.

Read more: How To Start Hot Water Heater In RV?

RV Tankless Water Heater Pros and Cons

rv tankless water heater pros cons

Like any device, RV tankless water heaters also have their own share of pros and cons. Knowing what these are is important for a buyer as it is crucial in the decision-making process. Read the pros and cons that this device can offer.

Convenient
Instead of heating up small batches of water at a time, an RV tankless water heater spares you from all that hassle. With just a push of a button, you can get hot water on demand.

Not to mention, they are also very quick about it compared to traditional models. You can get hot water then and there without the long waiting time.

Compact
A tankless heater is not bulky because it has no storage tank versus a traditional heater. Because of this, they are compact and easy to move around. Not to mention they save a lot of precious space inside an already-cramped RV. With this, you can make efficient use of that space the water heater was supposed to occupy.

Must connect to a water line
You must connect it to a water line. It is a disadvantage for some people. However, it offers plenty of benefits they also love. Some camping sites might offer it, but some do not.

RV Tankless Water Heater Electric or Propane

RV tankless water heaters, also known as demand-type or instantaneous water heaters, conveniently provide hot water on demand. With just a push of a button, the heater heats up cold water from the pipe immediately and provides it to the user.

Because of this, these RV tankless water heaters are quite energy-efficient as they don’t suffer from energy losses. This in turn, helps save money in the long-run.

These tankless water heaters work on gas burners/ propane or electric elements. Choosing what to purchase depends factors, such as the location or your RV’s amenities.

RV Electric Tankless Water Heater

electric tankless water heater for rv

RV electric tankless water needs electricity to run. Users can use it with a generator or a solar panel.

Since they run on electricity, these tankless water heaters are cost-efficient and are eco-friendly which a lot of users appreciate. Unlike their gas counterparts, electric tankless water heaters allow for continuous use as you don’t need to constantly refill them.

They are quite expensive. You cannot use them without a power source.

RV Propane Tankless Water Heater

rvpropane tankless water heater

They run on gas, kerosene or propane and need ventilation.

Compared to electric RV tankless water heaters, gas types are cheaper and more convenient since they do not run on batteries nor do they require a power source. Propane RV tankless water heaters also provide a higher flow rate and have more effective heating systems. If you want, there are also models that have electric hookups which gives more flexibility.

On the downside, RV propane tankless water heaters are not really environment-friendly. They tend to release greenhouse gases, depending on water to heat.

What Size RV Tankless Water Heater?

size rv tankless water heater

Size matters. Your tankless water heater should be with the right size, so it works optimally.

If you have a small RV, you can choose a small tankless heater. Choose a large one if you have a large RV.

It would supply a large amount of warm water. However, it will take space in your recreational vehicle. It wouldn’t be an effective way to use a large one if you have a small RV.

However, you should not buy a small heater if you have a large RV. It can accommodate a higher capacity heater. It can be a waste to get a small one with a large need.

How many appliances require hot water in your mobile home? It is another thing to consider.

You should get a large heater if you want hot water in the washers, sinks and showers. Overall, choose a lightweight unit.

How Much is a RV Tankless Water Heater?

how much is a rv tankless water heater

RV tankless water heaters are available at different prices. It varies from brand to brand. Using up all your money on a tankless water heater is not ideal; however, this doesn’t mean that you can skimp on your budget either.

Premium heaters are more expensive than cheaper ones. They also produce hot water longer than others do. However, they cost more than basic heaters do.

But you don’t have to worry, there are also budget-friendly options. Smaller RV tankless water heaters are generally priced lesser than higher end models. With this, you can comfortably and conveniently use a fair amount of hot water during your RV trip.

RV Tankless Water Heater Installation

rv tankless water heater installation

Installing an RV tankless water require a fair amount of work and effort. The complexity of the installation work will depend on the type of water heater you have and the amount of conversion work that needs to be done.

You might want to hire a plumber or a professional to install it. You can follow these tips to install it yourself if you want.

  1. Turn off or disconnect your RV’s water supply.
  2. Carefully remove your RV’s old water heater.
  3. Make sure you have buckets and towels for accidental spills.
  4. Select the location of the new heater.
  5. Make sure the heater has adequate ventilation either gas or electric.
  6. Turn the heater on and enjoy your hot water!
  7. Turn the heater on and enjoy your hot water.

RV Tankless Water Heater Problems

Tankless water heaters are a great addition to have in your RV home. With this, you can get your own supply of hot water with just a push of a button. Not only are they convenient, but they are also compact and cost-efficient. As such, travelling during the winter or chilly months will seem like a breeze. If not maintained, they can deteriorate and not function well. What are the most common maintenance issues of RV tankless heaters? This section lists down the causes and issues. Read it.

With this information, you’ll know how to solve them or avoid them in the future.

110v Tankless Water Heater for RV

110v tankless water heaters for your RV can be quite expensive. Take care and maintain them to get the most of your money.

Think about quality when buying a 110V tankless water heater. It’s best to take your time and compare different models and brands before you make a purchase. You might buy a unit requiring more repairs if you don’t consider carefully.

It’s also best to think about your RV’s water demand. A small heater may be enough if you travel alone. However, you must buy a larger one if a large group.

To get the most out your heater, it’s strategic to install it in locations where hot water is needed. It could be the showers.

Mineral Build-Up

A common problem is mineral buildup. Check out this sign. The water pollutants cause this problem. You must think about water filtration to avoid poor water quality. Hard water causes high mineral content. It leaves residues that contaminate water. You should check and fix it.

They can clog drains, pipes and plumbing system. They can also damage surfaces and appliances. Scaly minerals also build up in the water heater. They cause the staining and damage to it.

To avoid any damage, it’s important to clean up your water heater with a descaler every 6 months. If you want, you can also use a water softener to slow the build-up.

The System Is Overloaded

Overloading is another issue in water heaters. It happens when multiple hot showers are working. It is only one example. Hot water usages at the same time can overload the unit. When this happens, the unit can shut down or not work properly.

Run your heater based on its capacity and nothing more. You must also avoid using it for numerous applications simultaneously. It might be time to upgrade to a new version if you want.

If you want, you can also purchase another unit which might be beneficial in the long-run.

Failure of the Flame

A gas pressure or electrical issue leads to flame failure. It might start heating up when it happens. Check the energy source when it happens.

See its fuel level. Check its gas or propane level. You must also check you connected it to power if it is electric. Also, see it is not low on battery if battery type. Check for the gas lines or water heater valves, too. Combustion and regulator failures can cause flame failure, too.

Contact the manufacturer when it happened. It can troubleshoot the issue for you.


Installing a tankless water heater is a great investment and addition to any RV home. With this, you can conveniently have hot water with just a push of a button. Having one around will not only make winter travels easier and more comfortable, but it would also help your bills out in the long-run.

However, due to their popularity, there are a lot of RV tankless water heaters available in the market. It might make it hard to choose for beginners. Hopefully, this guide has provided you with enough information and data to help you make your choice.

Safe travels!

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