Best Electric Tankless Water Heater For Rv

I know you love to travel and stay in your recreational vehicle. It gives you a great sense of freedom.

However, one day you wake up and brush your teeth. After turning on the faucet, the bone-chilling cold water just ruined your morning! How would that feel?

Well, you may never have to go through this experience if you read this in-depth article. 

After reading an enormous number of articles; watching RV specialist videos, and taking customer reviews; we come up with top 10 Best Electric Tankless Water Heater for RV.

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In A Hurry? Here Is Our Top 3 Recommended Electric Tankless Water Heater For Rv


Stiebel Eltron Tempra 24 Plus Electric Water Heater

51m71 yLWBL. AC SL1000

Editor Rating:

Voltage: 240 V
Wattage: 24 kW
Water Flow Rate: 0.50 to 4.5 GPM
Water Temperature: 68° to 140°F
Weight: 16.1 Pounds (lb)
Warranty: 7 years


Ecosmart ECO 24 Electric Tankless Water Heater

81Plpbv8P3L. AC SL1500

Editor Rating:

Voltage: 240 V
Wattage: 24kW
Water Flow Rate: 2.4 to 5.8 GPM
Water Temperature: 80°F to 140°F
Weight: 13.75 Pounds (lb)
Warranty: Lifetime


Rheem RTEX-18 Electric Tankless Water Heater

91J18WlAKqL. AC SL1500

Editor Rating:

Voltage: 240 V
Wattage: 18kW
Water Flow Rate: 4.3 to 4.4 GPM
Water Temperature: 80°F to 140°F
Weight: 14.8 Pounds (lb)
Warranty: 5 years

Top 10 Best Electric Tankless Water Heater For RV [Expert Reviews & Buying Guide 2021]

Electric tankless water heater for rv

Key Features and Specifications

81Plpbv8P3L. AC SL1500

Ecosmart ECO 24 Tankless Water Heater Review

During our research, Ecosmart has blown our minds. Why? Why not? It has Patented Self Modulating Technology that uses minimum electricity to heat the water. You don’t have to worry about extra bills, since it is energy efficient.

It’s safe to say that this ECO 24 is the best electric tankless water heater for RV. But that is not the only feature that this tankless water heater has got.

Heating Power and Capacity

The Ecosmart ECO 24 is a 24-kW tankless water heater with 100Amps power. It provides 2.4 to 5.8 Gallons of hot water every minute. The water temperature can be around 80°F to 140°F.

It mainly depends on the inlet water temperature and water flow. If you are maintaining a standard flow it will work for you as an amazing hot-water heater regardless of your inlet water temperature. 

Compact Design

Traditional water heaters take a lot of space. But this Ecosmart ECO 24 is very sleek and compact that any recreational vehicle owner needs. You can mount it to the RV wall and manage your floor space more efficiently. It can be your best tankless water heater for RV. 

Save Energy

Unlike the regular water heater, it doesn’t run all the time. It’s an on demand water heater for RV that uses electricity whenever you start using water.

Less energy consumption means more savings. That is one of the reasons we consider this as the best RV tankless water heater. Using it in a camp trailer is too much fun.

Portable and Multi-Purpose Heater

The weight of this tankless RV water heater is only 11 pounds. You may love the portability if you are a camper. 

Also, it has all the features that a whole house electric tankless water heater needs. Whenever you go to your home, you can use this as the best electric tankless water heater whole house. 

Things I Don’t Like

If your RV is too small or doesn’t have a reliable source of electricity, you might not be able to enjoy all the potential of this RV tankless hot water heater.

Also, purchasing and installing this heater might be very expensive.

  • Powerful heating capacity
  • Compact Design
  • Deliver 2.4 to 5.8 gallons of water every minute
  • Patented Self Modulating Technology
  • Uses less electricity
  • Lightweight and Portable
  • Ideal for both RV and Home
  • Lifetime warranty
  • Need Reliable Source of electricity
  • Not ideal for small RV
  • Might Not be affordable for everyone

2.Stiebel Eltron Tempra 24 Plus Electric Water Heater

Key Features and Specifications

51m71 yLWBL. AC SL1000

Stiebel Eltron Tempra 24 Plus Review

If you have a good budget and looking for a premium quality electric water heater then look no further. This Stiebel Eltron Tempra 24 Plus is the best tankless electric water heater in terms of quality.

It has the Advanced Flow Control technology that can maintain the optimal temperature for a constant water supply. Whenever the water demand exceeds the capacity, it adjusts the temperature by reducing the water flow.

So, you don’t have to worry about hot water whenever you go for a warm shower.

Power Capacity

Though we are reviewing the 24kW model, there are multiple variations available for this product.

Stiebel Eltron did an amazing job by dividing these heaters based on power and heating capacity. According to your requirements, can go for any variations you would like.

Water Flow and Heating

The activation flow of this Tempra 24 Plus is 0.50 GPM and the max flow is 4.5 gallons per minute. It can deliver hot water from 68°F to 140°F temperature.

However, the temperature will depend on your inlet water flow. Higher flow means lower temperature. But don’t worry. Let the Advanced Flow Control technology do the job and you will enjoy your warm experience.

Smart and Noise-Free

This Tempra 24 Plus comes with a copper heating system. That is why we say this is the best electric tankless water heater for cold climates. It doesn’t make any noise while you use the water. The digital display indicates the temperature and you can adjust them manually by using buttons.


Apart from using it in your RV, this is the best tankless electric water heater for large family

The weight of this unit is only 16 pounds. Despite being a compact heater, it has all the features a house heater should have. No doubt you can use it as the best electric tankless water heater for whole house applications.

Things I Don’t Like

The flow rate of this Tempra 24 Plus is ideal for one showerhead or one faucet. If you need to run multiple showerheads at the same time then 24kW power might not deliver enough GPM water.

  • Comes with Different power variations
  • Hot water from 86°F to 140°F
  • 4.5 GPM Max Flow
  • Energy Saving
  • Only 16-pound weight
  • Noise Free Heating
  • Ideal for RV and Home use
  • Might not be enough for multiple shower or faucets
  • Not affordable for everyone

3.Rheem RTEX-18 Tankless Water Heater

Key Features and Specifications

91J18WlAKqL. AC SL1500

Rheem RTEX-18 Tankless Water Heater Review

A medium or small size RV can’t handle high power heaters. That is where Rheem comes in. This Rheem RTEX-18 is the best electric tankless water heater for RV.

The most unique feature of this tankless water heater is the external digital thermostatic control followed by an LED Display. If you have a medium size recreational vehicle then this is the ultimate on demand water heater for RV.

Water Flow and Copper Heating

It comes with two threads of copper heating system which is ideal for any water heater. Copper can deliver hot water within a short time. The other good thing about this technology is you can easily replace or service it.

The flow rate of this Rheem RTEX-18 is up to 4.4 GPM. If you use a single point of use, you might get around 4 gallons per minute. However, using multiple points will decrease both GPM and water temperature.


This feature is also similar to the previous heater. Once you set the temperature the Rheem RTEX-18 can regulate itself and adjust the water temperature according to the water flow and requirements.

Thus, you will have non-stop warm water for a longer period.

Things I Don’t Like

The power capacity only captures a small or medium size RV or home. If you have multiple points of use or looking for a water heater for a large RV then this might not be an ideal choice.

  • Non-stop hot water
  • Digital thermostatic control with LED DIsplay
  • Temperate range from 80°F to 140°F
  • Energy efficient
  • Copper immersion heating system
  • Durable and Easy to replace
  • Easy to install
  • Ideal for Single point use
  • Not ideal for large home or multi-point use

4.ECOTOUCH Tankless Water Heater

Key Features and Specifications

51KkVlFseEL. AC SL1300

ECOTOUCH Tankless Water Heater Review

If you are on a budget, this ECO TOUCH55 is the best RV tankless hot water heater you can go for. It is small, compact, and powerful enough to deliver warm water for a small RV or Home.

You may have noticed that other tankless water heaters don’t even come close to the price. What exactly does it offer? Let’s find out!

Power and Heating Temperature

The ECO 55 comes with a 5.5kW power capacity. Once you turn on the heater, it will increase the water temperature up to 116℉ depending on the water flow rate. The activation flow is only 0.4 GPM and you can have 1.5 gallons of hot water every minute.

Though the flow rate might be a little less, you hardly see any temperature up/down.

Smart Modulation and Convenience

For better control and experience, the ECOTOUCH Tankless Water Heater offers a digital display and touch control system. Also, the installation process is pretty easy.

All you have to do is, just follow the simple instructions. The smart modulation system will take care of the rest.

Energy Saving

Based on your temperature settings and flow rate, this ECO 55 tankless water heater has the ability to control the power input. That means it will draw less power when you reduce the water flow.

Thus, it prevents energy-wasting and you can save your electricity bills.

Safety and Durability

ECOTOUCH doesn’t compromise on safety. The ECO 55 has gone through intense testing to ensure you don’t face any accidents. Both the water and electricity lines are designed carefully to avoid leakage issues.

Things I Don’t Like

The water flow rate might not be enough for you if you want to have a hot shower with this heater. However, this is completely justified if you take a look at the pricing.

  • Smart modulation
  • Energy efficient
  • Safe from rusting or bacterial issues
  • Water Temperature up to 116°F
  • Easy to install
  • ETL Safety Certifications
  • Ideal for Small RV or Home
  • Flow rate is low
  • Not ideal for heavy use

5.Girard 2GWHAM Tankless Water Heater

Key Features and Specifications

51CpvTSgEtL. AC SL1000

Girard 2GWHAM Tankless Water Heater Review

Though you are looking for an electric tankless water heater for RV, there is no denying that propane gas heaters are more sustainable. You don’t have to worry about the electricity drain.

The Girard 2GWHAM is the best tankless water heater for RV. It runs on propane gas and supplies on-demand hot water to save you from the winter cold.

Micro Processor for Monitoring

It comes with an onboard microprocessor that allows you to monitor inlet water flow and temperature. Regulating the burner also helps you to set the outlet water temperature according to your needs.

You can set the temperature from 95°F to 124°F in this tankless water heater depending on your water flow and temperature.

It also has a UCP (User Control Panel) that allows you to do visual diagnostics and trouble-shooting.

Hinged Door

Generally, tankless gas water heaters come with twist-latches. And it’s hard to open and close doors with that. But the Girard 2GWHAM doesn’t do that.

By using the sliding latch, you can easily open and close the heater door whenever you want. Though you may have to order the door separately.

Freeze Protection

The build quality of this Girard 2GWHAM tankless water heater is fantastic. It is specially made for winters and comes with freeze protection so you don’t have to worry about getting frozen.

You can simply forget about everything and enjoy your winter with hot water.

Things I Don’t Like

The standard package doesn’t include the heater door and you have to order them separately. Though we believe it’s fair enough. Because you may already have one.

  • Compact Design
  • Specially made for RV
  • Micro Processor for Monitoring
  • From 95°F to 124°F Temperature Range
  • UCP for visual troubleshooting
  • Freeze Protection
  • Can fit into almost all size of RVs
  • The Hinged Door doesn’t come with a standard package

6.Rinnai V94EP Tankless Gas Water Heater

Key Features and Specifications

61FWGyXa0IL. AC SL1500

Rinnai V94EP Tankless Water Heater Review

Won’t it be amazing if you could use the RV tankless gas water heater for your home as well?

That is exactly what Rinnai V94EP does. This is one of the best tankless water heaters for RV and home. It continuously delivers hot water while maintaining regular water flow.

High Water Flow

This is one of the best parts of using an RV tankless gas water heater. It can deliver up to 9.4 Gallons of hot water every minute. Electric heaters have their own advantages. But gas heaters can deliver more water flow.

Now you can enjoy your shower with unlimited hot water.

Save Space

The Rinnai V94EP mostly looks like a small suitcase. The interface is so small, you can install it inside any closet or wall. Since you have to install the main part outside your home, it can save more space in your house.

Replaceable Parts

Rinnai offers a replacement facility for all of its parts. Instead of buying a new one, you can simply replace the parts of your tankless gas water heater.

Also, it comes with a long-extended period of warranty. So, you might not even have to worry about the parts for a long time.

Things I Don’t Like

You can use natural gas water heaters in your home. However, propane gas heaters are recommended to install only outdoors. So, the main unit might be damaged by natural disasters or animals.

Also, you might have to test the gas tank after a certain time. Though it is important for your own safety, it might be annoying for a lazy person like me.

  • Outdoor installation saves space
  • Sustainable Energy Source
  • 9.4 gallons of hot water every minute
  • Replaceable Parts
  • Extended Period of warranty
  • Ideal for Large RV and Home
  • Can be damaged because of outdoor climates

7.Rinnai V53DeP Tankless Water Heater

Key Features and Specifications

61jDU1u4imL. AC SL1500

Rinnai V53DeP Tankless Water Heater Review

If you want to control a powerful tankless gas water heater with your mobile then this Rinnai V53DeP is the best heater you should consider buying. It comes with WiFi connectivity that makes the controlling more convenient.

You can also set timers and schedules. And the latest version of the app allows you to put the heater into the vacation mode. Amazing. right?

Heating Power and Water Flow

Also, the heating power can go from 15500 BTU to 120000 BTU to ensure optimal temperature for a longer period. There are only a few tankless gas heaters that are capable of drawing that much power.

With that much power, your heater can go up to 120 F based on your inlet water temperature.

Parts Durability

As you already know, the quality of the Rinnai parts is very premium. You don’t have to worry about them for a long period. Even if you face any issues, it offers a standard warranty period and all the parts are replaceable.

Things I Don’t Like

Some users have said that this Rinnai V53DeP takes too much time to heat. Though it’s a very common issue for RV tankless gas water heaters.

Also, you may run out of hot water if your water flow is higher than the recommendation.

  • 120,000 BTU max heating power
  • 120 F Temperature Range
  • Mobile App for better control
  • WiFi Connectivity
  • 5 gallons of hot water every minute
  • Durable Parts and Warranty
  • Ideal for large RV and Home
  • Takes extra time to heat
  • Can’t deliver hot water above recommended water flow

8.Suburban SW10DE Electric Water Heater

Key Features and Specifications

91MfNAlpDGL. AC SL1500

Suburban SW10DE Electric Water Heater Review

How about a heater with a water tank? Well, it’s not bad if you know which one is made to fulfill your purpose. The Suburban 5243A is one of the best water heaters you can have specifically for your RV.

The most amazing thing about this heater is it comes with different power options. They have gas models, electric models as well as gas-electric models available with multiple sizes and lots of features. Select according to your RV size, power source, daily needs and you are good to go.

Power and Heat

This Suburban SW10DE comes with great power. With the help of 1440W power drawing capacity, it can produce 12000 BTU (British Thermal Unit). This amount of power is more than enough to deliver non-stop hot water throughout the winter.

Capacity and Recovery Time

The Suburban SW10DE can hold 10 gallons of water. And you would be amazed to know that it can heat 10 gallons of water every hour. This is insane!

There are only a few hot-water heaters available with this amount of tank capacity and quick recovery time.

Porcelain-lined Design

You may have noticed that hot water is not friendly with metals. But it has no issues with porcelain. The body of this Suburban SW10DE is made of porcelain. And the water tank is made of steel that can absorb the electrolytic action.

The durability is the main reason these water heaters are very famous. If you properly maintain it, using this heater for 5 or 6 years is very normal.

Things I Don’t Like

During our research, we noticed that some of the users have experienced tank leakage issues because of the defective unit. Though the warranty policy covers that, still it’s a painful situation if you have to go through it.

  • 12,000 BTU Power Rating
  • 10-gallon water tank capacity
  • Can use both gas and electricity as the fuel
  • The body is made of porcelain
  • The water tank is made of steel
  • Amazing Durability
  • Some users have experienced leakage issues

9.Eccotemp Electric Water Heater

Key Features and Specifications

717vJ9VKNkL. AC SL1500

Eccotemp Electric Water Heater Review

Do you need an electric water heater for your RV sink or kitchen faucet? This Eccotemp EM-7.0 is the best mini tank water heater you can have right now. It can hold 7 gallons of hot water and supply whenever you need it. 

According to our research, this is better than any ordinary tank water heater available in the market.

Powerful Heating

This Eccotemp EM-7.0 electric water heater comes with 1440 watts powerful heating capacity. By using the 120v outlet plug, it can draw 12 AMPS power with a water pressure of 150 PSI.

You can expect the temperature to be from 70F to 140F and adjust it according to your needs. However, it mostly depends on the water flow.

Simple and Easy Installation

Unlike the other electric heater, you don’t need to spend hours reading the installation manual. The Installation process of this Eccotemp EM-7.0 electric water heater is very simple.

You just have to install the pressure relief valve and 2 water connections. Once it’s done, just plug it. You will have warm heated water very fast.


The weight of this Eccotemp EM-7.0 electric water heater is only 1.6 ounces and the product dimension is also very slim. You can fit this almost anywhere you want.

However, we recommend using it under the kitchen cabinets or counter. That is the perfect spot to isolate anything.

Multi-purpose Use

There are many advantages of this amazing electric mini tank water heater. You can use it almost everywhere. Though it is perfect for home use, cottages and kitchenettes, you can also use it in Boats and RVs.

It doesn’t matter whether you want to use it for personal, commercial, or residential purposes. You would be amazed by its service.

Things I Don’t Like

The pressure standard is 150 PSI for this water heater. Your water might not be warm enough if your inlet water pressure is high. In that case, you may need to adjust it.

  • 1440w Powerful Heat Production
  • Simple Installation Process
  • 70F to 140F Temperature
  • 150 PSI Standard water pressure
  • Lightweight and Easy to use
  • Helps to reduce energy waste
  • Ideal for Home, Office Kitchen or RV
  • Inlet water pressure must be around 150 PSI

10.Camplux ME60 Electric Water Heater

Key Features and Specifications

51CtsNuRajL. AC SL1001

Camplux ME60 Electric Water Heater review

Looking for an electric water heater only for your kitchen sink or faucet? This Camplux ME60 is the best electric water heater when it comes to home appliances.

It offers all the features you need to have warm water throughout the winter. And it also cares about your safety.

Powerful Heating

This Camplux ME60 Electric Water Heater comes with 1440 watts power capacity. It fits under your sink and provides warm hot water from 50F to 140F.

It delivers 6-gallons of hot water with a pressure of 150 PSI. Once the tank is empty, it doesn’t take too much time to refill it.

With the glass-lined tank design, it is easy to maintain this water heater. Also, this technology helps you to have efficient heating and saves a lot of energy.

Easy installation

It comes with a 43-inch power cord. You can simply plug it into the 120-volt outlet to initiate the easy installation process.

The maximum recommended water pressure is 150 PSI. But don’t worry. It comes with a CSA listed pressure relief valve with the package.

Compact Design

If your heater is placed far from your sink, it takes too much time to reach the releasing tap. Thus, it loses a significant amount of heat.

With this Camplux ME60, you don’t have to deal with any of these issues. It sits just under your sink and doesn’t use any long pipes to deliver hot water. You will have instant water as warm as it is in the tank.

Adjustable Thermostat

The Camplux ME60 is configured with an adjustable thermostat. All you have to do is set the thermostat. After that, it will control the temperature and give you the right amount of warmth.

Freezing Protection

Any water heater might be frozen if you don’t use it for a long time. But you don’t need to be worried about this Camplux ME60. Turning the thermostat knob to the snowflake position will solve this freezing issue.

Things I Don’t Like

The red light indicates that the water is heating up. However, it goes off after a few seconds. It would be better if there was a green button once the water is heated properly.

  • 1440w Heat Capacity
  • Easy installation
  • 50F to 140F Temperature
  • 150 PSI Standard water pressure
  • CSA listed pressure relief valve
  • Adjustable Thermostat
  • Freezing Protection
  • Ideal for home kitchen or faucet
  • The red light goes off after a few seconds.

Buying Guide: How to Choose the Best Electric Tankless Water Heater For RV?

Best tankless electric water heater for large family

You may have already read some rv electric tankless water heater reviews and wondering what is the best electric tankless water heater? However, the amount of information and difference between them can be overwhelming.

In this detailed buying guide, I will discuss how you can choose the best electric tankless water heater for RV.


First of all, you have to check how much power it can produce. For an initial filter, go for something that has 1400w to 1500w capacity. After that, you can look for other features and dividing factors.

2.Purpose of Use

Some of the water heaters can be used in both RV and home. Read the features and check whether the heater offers both functionalities.

If you need a tankless heater for RV then read this review. However, we have also covered some of the best whole house electric tankless water heater reviews.

3.Heat Production Capacity

This is the most crucial part when it comes to choosing the best electric tankless water heater for RV. First of all, you have to know the average temperature in your area.

After that, go for something that is capable of handling that temperature and make the water warm. Any tankless water heater with 80 to 140 F temperature coverage should be good.

4.Recommended Water Flow

The temperature coverage is very much related to the water flow of your showerhead or tap. If your water flow is high you may experience less hot water. So, going for a heater with high water flow capacity would be wise.

5.Wire & Breaker

This is the part that everyone forgets. All the electric tankless water heaters come with different wire and breaker recommendations. You must check them before you make a purchase. Unless you may have to suffer during installation.


A lightweight electric tankless water heater is very important since it is related to the overall performance of your RV. Look for a heater that is lightweight and doesn’t compromise on the power and heating capacity.

7.Warranty and Service

We always recommend digging into the warranty policy and after sales service before making any purchase. You can check the best electric tankless water heater consumer reports to know about the service quality of the manufacturer.

Benefits of RV Tankless Water Heaters

Best mini tank water heater

Wanna know electric water heater pros and cons. Let’s discuss the main point. Why it is more profitable to install a tankless water heater instead of a conventional water heater?

1.Instant Hot Water

Unlike the regular heater, you don’t have to wait for the hot water. It doesn’t store water so you can have heated chilled water on the go.

2.Longer Lifespan

If you purchase a high-quality tankless water heater, you may not have to worry about anything for a long time.

3.Longer Warranties

As these heaters can generally last for a long time, manufacturers come with a very long period of warranty. Some of them even offer lifetime warranty.

4.Space Savings

As it doesn’t have a tank to store water, you don’t have to worry about the space in your home. You can simply mount them to your wall.

5.Electric and Gas Power

There are two types of electric heaters available. You can choose any power source according to your convenience.

6.Tank Vs Tankless Water Heater

How to Install a Tankless Water Heater in RV?

  • Turn off the power source. (Electric/Gas anything)
  • Switch off the water pump in your RV
  • Turn off the DC fuse box
  • Remove the existing heater (if you have any)
  • Put the new heater into the water heater box
  • Plug all the necessary wires and breakers
  • Turn on the power source and DC fuse box

Electric Tankless Water Heater Installation Requirements (Tools)

  • Flat head screwdriver
  • Tape measure
  • Drill + drill bits
  • Phillips head screwdriver
  • Pencil
  • Needle nose pliers
  • Adjustable wrench
  • Pipe cutter

Water Heater Installation Guide

Final Words

According to our research, we found that the Ecosmart ECO 24 is the best electric tankless water heater for RV. You can also use it in your home, office or anywhere. Hope this in-depth research helped you to find the best product.

Now, tell us why do you love electric tankless water heaters so much? Is there any specific reason? Also, which part of this article did you find helpful?

We really appreciate your thoughts and would love to hear from you.

Electric Tankless Water Heater For RV (FAQs)

  • Heater price and the installation cost is very high
  • Takes a lot of time to deliver hot water
  • Difficult to get water with same temperature for long time
  • Heat fluctuates too much according to the inlet water flow
  • Con: No Access to Hot Water During a Power Outage

The breaker size is different for any tankless water heater. However, a regular heater needs a 40-50-amp breaker for one wire. We recommend checking the manufacturer instructions about this.

If you have 5 members in your family, you may need 10 GPM gas tankless water heaters. It would allow you to run multiple showerheads or water faucets at the same time.

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