Best Electric Tankless Water Heaters For RV 2023

Spending time in an RV is fun, but on the other hand, it may be problematic if you run short of hot water in your RV. To make your RV more comfortable like the home, you need the Best Electric Tankless Water Heaters For RV. Nowadays tankless water heater is one of the essential appliances.

The electric tankless water heater provides you with hot water whenever you need it and wherever you are. Further, the plus point is that it operates on electricity; you don’t need natural gas or propane. On the other hand, electric tankless water heaters are energy-efficient. So, you don’t need to worry that it consumes high energy and you face any problem in your RV. Let’s start RV Tankless Water Heater Reviews with us.

9 Top Electric Tankless Water Heater For RV 2022

Image Product Price
Top Pick
Suburban Manufacturing SW6DE RV WTR HTR Check on Amazon
Camplux Propane Tankless Water Heater Check on Amazon
#Editor’s Choice
Rinnai V53DeN Tankless Hot Water Heater Check on Amazon
Bosch Electric Mini-Tank Water Heater Check on Amazon
EcoSmart ECO 11 Electric Tankless Water Heater Check on Amazon
Eccotemp i12-LP Water Heater Check on Amazon
Stiebel Eltron 220816 Mini 3 Tankless Water Heater Check on Amazon
Camplux Tankless Propane Water Heater Check on Amazon
Marey Propane Gas Tankless Water Heater Check on Amazon

Suburban Manufacturing SW6DE RV WTR HTR

The Suburban water heater is one of the best electric tankless water heaters for RV. It is specially designed for RVs and has a special design. Further, it has a heater and tank as well for your ease, so if you want to store water, you can do it easily. The water tank has numerous 6 gallons of capacity.

This water heater suits most RVs as it has motor aid models with multiple features and sizes that make it suitable. On the other hand, it also got, gas-electric and high recovery gas for your convenience so you can travel comfortably in your RV and enjoy your vacation.

All metals are attacked by heated water, but porcelain is not. So, it is the reason that this water heater uses a porcelain-lined and electrolytic action absorbed by a node rod included in a steel tank for water heaters. Furthermore, it is similar to those you have at home, so you don’t face any problems in your RV.

The BTUH rating of the unit is 12,000 and has a fast recovery rate. The recovery rate is 10.2 gallons per hour, which means it provides more hot water. Plus, it is safe to use and has a direct spark ignition gas heating system, and uses 12 Volts of power. If you often travel on RV, it is the best possible solution to use this water heater to get more and quickly hot water.


  • Dimensions: L x W x H 19.19 x 12.7 x 12.7 inches
  • Capacity: 6 gallon
  • BTU rating: 12,000
  • Recovery rate: 10.2 gallons per hour
  • Material: Porcelain


  • Heats up quickly
  • It operates silently
  • Durable porcelain construction
  • Huge water tank capacity


  • Slightly high price
  • No installation instructions

Camplux Propane Tankless Water Heater

Do you love to go camping in your RV? Then get a hand on this one of the most versatile tankless water heaters because it is highly portable and weighs only 10 pounds. And it is designed for outdoor usage, but it offers indoor installation as well; you can install it where the ventilation is proper. Moreover, it comes with oxygen depletion sensor protection which makes it unique and handy.

Camplux water heater has a dual power source; it can work with propane and is powered by 2 D cell batteries. You need 20 pounds of propane to operate the unit. Furthermore, the operating pressure of the Propane Tankless Water Heater For RV is 0.4 PSI, and the maximum BTU rating is 28,000 per hour.

The minimum rising temperature of the system is 46.4° F / 8° C while the maximum rising temperature is 114.8° F / 46° C at 1.32 gallons per minute. It also has an anti-freezing protection feature, so use it with full confidence when you are on vacation. Further, it offers safe operation as it has an oxygen depletion safety shut-off protection and flame failure device. These features ensure it is a safe unit. On the other hand, you just need 3 PSI to start your water heater.

It is approved by CSA and has a highly compact design; you can fold the handles easily to make it more compact. And it is an energy-efficient water heater, so you can conveniently use it in your RV.


  • Power Source: Battery Powered
  • Minimum temperature: 46.4° F / 8° C
  • Maximum temperature: 114.8° F / 46° C
  • BTU rating: 28,000 per hr
  • Water Pressure Range: 3.0 to 110.0 PSI
  • Hot Water Output: 1.32 GPM


  • CSA approved
  • Lightweight and portable
  • Low price tag
  • Perfect for RV and camping


  • Average quality
  • It will not work above 2000 ft

Rinnai V53DeN Tankless Hot Water Heater

Need a massive amount of hot water in an RV? Experience this Rinnai hot water that can provide you unlimited hot water in your RV for bath, washing dishes, and for other tasks. It comes with a reasonable flow rate of 5.3 gallons per minute which shows it is highly efficient for RVs. Furthermore, it has a special design, and it saves energy since it only heats when needed. This feature makes you sure it is an energy-efficient water heater.

Electric Tankless Water Heater For RV is highly compact as it designs for an outdoor installation. And it occupies little space in an RV. On the other hand, it features scale detection that improves the unit’s long-term durability due to a reduced risk of any severe damage.

Usually, rusty sediments accumulate in the storage water heater as they have a short life span. The tankless water heater gives you hot water on demand and has a longer life span. Rinnai water heater has a durable construction, works efficiently, and lasts long. Plus, it offers easy installation, but we recommend professional installation to prevent any damage to your water heater.

The company labeled a warranty of 10 years on the heat exchange, 5 years for labor, and 1 year on the parts of the water heater. In addition, the warranty issues if the unit installs per manufacturer specifications with a licensed technician.


  • Dimensions: L10.5 x W27 x H18.5 inches
  • Weight: 33 lbs
  • Power Source: Gas Powered
  • Material: copper
  • BTU rating: 10,300 to 180,000
  • Hot Water Output: 5.3 GPM


  • Easy to install
  • Very efficient in working
  • Not noisy
  • Needs little maintenance
  • Reasonable price


  • Not energy-efficient
  • Durability issues

Bosch Electric Mini-Tank Water Heater

Despite not being a genuine tankless water heater, the Bosch electric mini-tank water heater is now on our list. It comes mini tank that has a capacity of 4 gallons. This Best Mini Tank water heater for RV is not only for RVs; you can use it in your houses, apartments, kitchenettes, boats, pool houses, garages, patio sinks, and basements.

This mini electric heater point-of-use connects under the sink. Additionally, you can mount the unit on the wall, shelf, and floor. It can be used under a single sink or as a supplement to a primary water heater. Using this water tank ensures quick access to hot water any time when you need it in an RV. Moreover, it offers easy and simple installation. Plus, the unit has a built-in pressure relief valve and temperature relief valve. 

The water heater is made with high-quality material and needs little maintenance. Plus, long service life is ensured by its premium glass-lined construction. Besides, it offers easy installation; the 36 to 37 inches cord plugs into a 120 volts outlet for independent installation. It has a plug-in connection and consumes 1440 watts of power and 120 volts. Alternatively, it could be connected to an enormous hot water source.


  • Dimensions: L13.75″ x W13.5″ x H13.75″
  • Power Source: Battery Powered
  • Temperature Range: 65 – 145° F
  • Water tank capacity: 4 gallons
  • Water Pressure Range: 150 PSI
  • Recovery rate: 6.8 GPH  at 90° F Rise


  • 6 years of warranty
  • Occupies little space
  • Perfect for the price
  • Well made and design


  • Assembling is challenging
  • Flaws in design

EcoSmart ECO 11 Electric Tankless Water Heater

Buy this one of the best and highly compact tankless water heaters for your RV. It needs little space for installation and is 90% smaller in size as compared to the storage water heater. Further, you can mount the water heater on the wall or may install it at the point of use. So, the choice is yours.

You will never run out of hot water in an RV as this water heater provides you endless hot water whenever you need it. On the other hand, you can control the flow rate by using this water heater in your RV. Plus, it allows you to monitor the water temperature continuously. The working of the water heater remains constant within 1 degree of the selected temperature. So, these features make you sure the unit is effective and works well.

EcoSmart water heater is not only a space saver, but it is also an energy saver unit. The water temperature remains constant even when the heater is not used, unlike a tank heater. It only gives water when you need it and saves 99% of thermal energy. Moreover, the flow rate of the water heater ranges from 1.3 to 3.1 GPM. And the flow rate depends on the inlet water temperature. Additionally, consult the sizing guide to determine the best solution for your RV needs.

EcoSmart ECO 11 RV Electric Tankless Water Heater is ETL Listed and NSF/ANSI certified for your peace of mind. Further, the unit has Energy Guide – AHRI Energy Star certification as well.


  • Dimensions: L11.5 x W8 x H3.75 inches
  • Max Amperage: 57 Amps
  • Water Connections: ½ inches CF
  • Weight: ‎6.5 pounds
  • Voltage: ‎220 Volts
  • Wattage: ‎13000 watts


  • Compact and space-saver design
  • Thermal energy-efficient unit
  • It gives hot water quickly
  • Easy to install


  • Warranty not honored
  • It needs maintenance

Eccotemp i12-LP Water Heater

Go for this one of the most advanced liquid propane tankless water heaters for an RV. Further, you don’t feel any spot of cold water. It comes with low-flow ignition technology that gives you endless hot water on demand. It has a sleek, compact design and has a black glass front panel to make it more catchy. Additionally, it is highly versatile, and you can use it in your homes, cabins, and other compact areas.

The ignition system is safe, and it uses 110 volts of power. The idle power consumption is approximately 2 watts, and during operation, it consumes 1.07 Amps. This shows that the unit is energy-efficient. Additionally, it has an energy-saving mode as well. Plus, its cord is UL-listed.

Eccotemp water heater is the most safest as it has child lock technology and offers fully automatic control. In addition, you can adjust the temperature, turn it on and off, measure the flow rate on the LED display. The flow rate of the unit ranges from 0.6 to 4.8 GPM, and the BTU rating is 25,000 to 80,000.

It offers easy installation, and we recommend using standard ½ inches NPT water fittings. More on, you can mount it horizontally as well as vertically. For easy and easy installation, we recommend horizontal mounting. Plus, the package contains an instruction manual for your ease. Also, the package has a water heater, wall thimble, 2 termination pipes 0.5 x 20 inches, 120 volts power cord, hardware pack, and 2 0.5 x 20 inches 90 degrees elbow with backflow preventer.


  • Dimensions: L13.7 x W25 x H5 inches
  • Power Source: AC
  • Temperature Range: ‎140 Degrees Fahrenheit
  • Power: 2 watts
  • BTU rating: 25,000 – 80,000 BTUs
  • Recovery rate: 0.6 – 4.8 GPM


  • Sleek and high tech for the price
  • Easy to install
  • Well structure and durable
  • Perfect for RVs and small homes
  • Safe ignition system


  • A bit slow
  • Costly vertical installation

Stiebel Eltron 220816 Mini 3 Tankless Water Heater

If you spend little time in your RV and seeking for a mini tankless water heater. It is specially made for a sink only to wash hands, and it gives continuous hot water on demand. More on, the thing about this mini water heater is that you can mount it in up or down positions. Thanks to its innovative design, it can have its water connections facing either upwards or downwards. Therefore, it is handy to mount.

The handwashing water heater is designed to be installed at a single handwashing sink point-of-use. The point-of-use unit delivers warm water effectively when it is adequately sized. Furthermore, it is necessary to hardwire this mini tankless water heater during installation. Installation is easier with the pre-wired pigtail.

It is highly compact and needs little space for installation in your RV, and it is also an energy-efficient unit. It is made with durable material and for the users’ ease company labels 7 years of warranty for the leakage issue and 3 years on the parts of the unit.


  • Dimensions: L6.5 x W3.75 x H7.5 inches
  • Power Source: Battery Powered
  • Voltage: 120 V
  • Max. amperage draw: 15 Amps
  • Min. flow to activate unit: 0.40 GPM
  • Warranty: 7 Years Leakage / 3 Years Parts


  • It occupies little space
  • Easy to operate
  • Best lightweight heater
  • You can mount it up or down
  • Reasonable price


  • Slow flow rate
  • Difficult to operate

Camplux Tankless Propane Water Heater

Camplux water heater is one of the most compact, lightweight, and has a high level of portability water heaters on our list. It occupies little space in your RV. On the other hand, it is best for the barns, small houses, outdoor instant hot showers, cabins, and take it with you on the road trips.

This tankless propane heater is safe in all ways, as the CSA Safety Testing Standard tests it. Plus, it has a safe ignition system, overheating protection, and anti-freezing protection. So, these features make sure it is safe to operate. A drain plug with an anti-freeze function prevents condensation from freezing in cold areas over the long term.

Moreover, if the water temperature exceeds 167° Fahrenheit, the gas supply automatically shuts off. This shows it is an energy-efficient water heater. In addition to this, it is equipped with 11.5% energy-saving technology to make it more energy-efficient. It is equipped with advanced combustion technology to minimize gas consumption and the noise level of the unit. Further, the maximum BTU ratings of the heater are 68,000 BTU per hour. So, it gives hot water without wasting your time.  

It has a reasonable flow rate with a few minutes; you can get 2.64 GPM of hot water on demand. The water pressure of the unit ranges between 3.0 to 110 PSI, and it triggers the light. So, RVs and cabins benefit from low water pressure. Plus, it is easy to install wherever you want.


  • Dimensions: L x W x H 12.8 x 6.1 x 21.65 inches
  • Power Source: Battery Powered
  • Water pressure: 3.0 – 110 PSI
  • Maximum Power Output: 68,000 BTU per hour
  • Water Flow: 2.64 GPM
  • Voltage: 3 volts


  • Highly compact and portable
  • All accessories are included
  • Easy to operate
  • Durable and well-designed
  • Very dependable and useful


  • Non-standard threads

Marey Propane Gas Tankless Water Heater

When traveling in an RV, you don’t need to worry about the power and get the hot water on demand. You do not need to connect to an electrical outlet with this tankless water heater. Thus, it’s an ideal choice for RVs as well as an excellent substitute for households with frequent power outages. Further, you can save up to 60% of your electricity bill by using this water heater.

One of the best qualities of the Marey propane gas tankless water heater is that it works great when the water pressure is low. So, while traveling, it gives continuous hot water as it goes perfectly with low water pressure, and this water heater has an active flow system.

This is one of the most durable tankless water heaters as it has a rust-proof construction. And leaks did not cause water loss, which makes it unique among others. Furthermore, it has a compact structure and occupies very little space in your RV. On the other hand, it weighs only 21 pounds and highly portable feature. To satisfy you, the company labels 5 years of warranty tag.


  • Dimensions: L6.9″ x W13.6″ x H23.6″
  • Weight: 21 lbs
  • Battery: 2-D cell battery
  • Recovery rate: 3.1 GPM


  • Adjustable flow rate setting
  • Gives a good amount of hot water
  • Durable construction and rust-proof
  • It comes in 5 years of warranty
  • Take little space for installation


  • Bad battery panel design

Tankless Water Heaters Buying Guide

There are many things to consider if you’re going to buy the first tankless water heater for your RV or going to replace the previous one. Our buying guide helps you in order to get the best electric tankless water heaters for RV. In addition, many factors need your consideration, but first, you should have enough knowledge about the various types of water heaters for RV.

What are the different types of RV water heaters?

There are multiple types of water heaters available for RV. Some of them are electric, and the fuel source of others is gas. But we recommend you choose the electrical water heater for your RV.

Storage Tank Water Heater

It is the most common type of heater to have a storing tank. You can store water in the storage tank, and it will be held until you use it. Afterward, it is expelled from a pipe at the top of the unit. Additionally, the water heater comes with temperature-relief valves and pressure-relief valves. And these valves open when the water pressure goes higher than the preset level.

On the other hand, it is generally more efficient to use natural gas to heat water as compared to electric water heaters. Gas water heaters are more efficient, but you notice it is costly. There are a few advantages and disadvantages of the tank water heater.


  • Initial low cost
  • Less costly maintenance
  • Easy to operate
  • Cheap to install
  • It gives you a large amount of hot water


  • Needs large space
  • Not energy-efficient

Tankless Water Heater

In this type of water heater, the water is heated as you need it. You can’t store water as you can store it in the storage tank water heater. Further, the tankless water heaters are more energy-efficient when we compare them with the units that have a storage tank. On the other hand, tankless water heaters have some advantages and drawbacks.


  • Less costly repairs
  • Easy to maintain
  • Usually, last 20 to 30 years
  • It saves your money
  • You will have hot water anytime
  • Small and compact units
  • It heats up water quickly
  • It is energy-efficient


  • High price
  • Costly installation
  • Unit fails if you take a shower and laundry at a time

Condensing Water Heater

Condensing water heaters also have a tank for water storage. These types of water haters capture expended gases, which would otherwise be flued out. On the other hand, incoming cold water absorbs most of the heat from the hot gases blowing through the coil at the bottom of the unit. Further, it is not energy-efficient.

It is the best option if you need more than 55 gallons of hot water. They also have some advantages and drawbacks.


  • It can maintain a rating of up to 98%
  • Highly energy-efficient
  • It saves your money
  • Lower carbon emissions


  • It gets corrosion easily

Non-condensing Tankless Water Heaters

Non-condensing tankless water heaters only have one heat exchanger. And this causes the exhaust gases to vent more heat. Moreover, these water heaters continuously provide you with hot water on demand, and by using an accessory recirculation pump, users can access instant hot water. Some of the advantages and drawbacks of non-condensing tankless water heaters are;


  • It saves energy
  • It provides continuous hot water
  • Compact and space-saving designs


  • Due to high temperature, it may leaks

Solar Water Heater

Heat is absorbed by a solar cell mounted on the roof in the solar water heater. The closed-loop system converts that fluid into anti-freeze. Further, a pipe connects the water tank. This type of water heater is suitable in warm, sunny regions, and the best offer stellar summer savings. Additionally, on cloudy days it causes problems. They also have some advantages and drawbacks.


  • Higher-efficiency
  • Cost-friendly
  • Lower carbon footprint
  • It needs little maintenance
  • Highly compact design


  • It needs direct sunlight
  • It stops working on cloudy, rainy, and foggy days

We discussed the various types of RV water heaters, so you the best one for your RV. Now consider the following factors to get an effective tankless water heater for an RV.

Related Reading: Should I Leave My RV Water Heater On All The Time?

British Thermal Unit Rating

The water heaters’ heating capacity is measured in BTUs. This will give you a sense of how much heat you’re dealing with, and it is one of the most important factors that demand your attention. On the other hand, focus on where you plan to travel on your RV and how much hot water you need.

It is primarily due to the fact that groundwater temperature varies according to location. Additionally, water heaters for RV are also prone to malfunctions when heating groundwater with a low temperature. Furthermore, the unit ranges from 30,000 and 50,000 BTU per hour is suitable for RV.


Electric tankless water heaters come in multiple sizes. But we recommend you to go for the smaller unit as RV has compact, so the unit should be compact.

Flow Rate (GPM)

Another important factor that needs consideration. First of all, determine your need and how much hot water you need at your peak time. Have you washed clothes, taken a bath, and used the kitchen sink at the same time? After that, sum up the flow rate.

We recommend you choose a unit that offers a high flow rate. So, whenever you travel in your RV, you don’t face any issues and do multiple tasks simultaneously.

Easy Installation & Maintenance

Always choose the water heater that offers easy and quick installation. So, when you’re on tour, you don’t face any trouble during installation. Further, make sure to pick the water heater that offers DIY installation; it saves your money, and you don’t need to call a professional when you are on vacation.

When you travel on RV, the water heater in your RV must be maintained to get the best possible results. Choose the unit that a company services for a year minimum. If the unit needs little maintain you will be tension-free on your vacation.

Digital Displays

Always try to choose the unit that has a digital display. It is because the digital display helps you to control the water heater and monitor the operation. More on, the latest electric water heaters are equipped with a vacation mode. So, when you turn on this feature, use the heat pump to make the unit effective.

Further, digital displays show the temperature and let you know how much time the unit takes to heat the water.


Usually, electric tankless water heaters are expensive compared to tankless water heaters. Therefore, we tried to choose highly energy-efficient models. The tankless water heaters have an initial cost high, but they save your electricity bill later on as most of the units are energy-efficient. They help you in saving up to 60% on electricity bills.

All the above-mentioned tankless water heaters have a moderate price tag. The price ranges from $150 to $600, so you people can choose according to your budget. Additionally, they all work great and give you hot water for a luxurious bath and other purposes on your demand.


Usually, people don’t pay much attention to this factor. But we recommend you choose the unit that comes in warranty because the electric water heater is that device that you don’t buy regularly. Sometimes the unit stops working suddenly, and if it has a warranty, you can contact the company. Further, you may get the new one or repair the damaged water heater.


Is it possible to put an electric tankless water heater in an RV?

Tankless water heaters are common in modern RVs. On the other hand, you can fix the electric tankless water heater in the old RVs rather than using traditional water heaters.

What are the drawbacks of an electric tankless water heater?

Everything has advantages and disadvantages. The drawbacks of an electric tankless water heater are;
Costly initial price
A limited supply of hot water
Temperature is not always consistent
Limited flow rate
Need accessories to install
If you are going to replace it with a tank water heater, you have to call the professional for installation.

Can we mount a tankless water heater anywhere in an RV?

Yes, you can install your tankless water heater anywhere you want. This is one of the most significant advantages in that it has a compact design and occupies little space. Furthermore, you can mount the unit outside an RV as well.

Do we need a water pump with a tankless water heater?

Some of the latest tankless water heaters come with recirculation pumps. It is costly as compared to those units that come without recirculation pumps. If you’re mounting a new unit, we recommend you choose the unit with recirculation pumps, so you don’t need to buy again. Further, it saves your money as well.


The products we have on our list are best in their ways. Enjoy the coziness and accessibility of continuous hot water on demand in your RV with the best electric tankless water heater. Now, you can have a luxurious bath in your RV when on vacation and don’t need to worry about the weather outside the RV.
We recommend the Stiebel Eltron 220816 Mini 3 Tankless Water Heater. It is one of the best as you can mount it in an up or down position in your RV. Consequently, our 2nd recommendation is Suburban Manufacturing SW6DE RV WTR HTR. This water heater is a good option if you’re looking for durability, efficiency, and a high flow rate.
Try any of those mentioned above electric tankless water heaters to get hot water any time and anywhere. Stay Warm & Cozy!

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