Best Electric Tankless Water Heater for RV: Tested and Reviewed

When it comes to RV living, the little luxuries make all the difference—like enjoying a hot shower after a long day of exploring. That’s where an electric tankless water heater comes in. These compact, efficient devices provide instant hot water on demand, eliminating the hassle of waiting for a tank to fill or reheat. But with so many options on the market, how do you know which one is the best for your RV? In this guide, we’ve tested and reviewed the top electric tankless water heaters for RVs to make your decision easier. Whether you’re a weekend adventurer or a full-time RVer, this guide covers everything you need to know—from performance and efficiency to durability and ease of use.

List of the Best Electric Tankless Water Heater for RV:

Check out the thorough review of the best electric tankless water heater for RV below.

1. GIRARD Electric Tankless RV Water Heater

The Girard Tankless RV Water Heater delivers an outstanding performance tailored to the needs of RV enthusiasts. Operating on 12V power, this water heater is equipped with a quiet, brushless motor consuming less than three amps. With a heating capacity of 42,000 BTUs, it ensures a continuous supply of hot water while maintaining energy efficiency. Unlike traditional six-gallon tank water heaters, the Girard unit consumes half the LP gas for the same output, making it a highly efficient choice.

The onboard microprocessor monitors key variables such as cold water temperature, flow rate, and outgoing water temperature to ensure steady and consistent hot water without cold spots or scalding risks. The digital control panel enhances usability by allowing precise temperature adjustments (95°F to 124°F) and providing error codes for troubleshooting. At just 22 pounds and measuring 12.5 inches in width and height, its lightweight and compact design ensures it fits seamlessly into existing cutouts.

Key Features

1. High Heating Power: 42,000 BTUs for continuous hot water.
2. Energy Efficiency: Consumes 50% less LP gas than traditional six-gallon tank water heaters.
3. Intelligent Control: Digital panel for precise temperature adjustment and diagnostics.
4. Compact Design: Lightweight and fits existing RV water heater openings.
5. Easy Maintenance: Hinged door and no need for bypass plumbing or anode rods.

Pros

• Provides consistent hot water without cold spots or scalding.
• Lightweight and compact design for RV compatibility.
• Quiet operation at less than three amps.
• Digital controls for easy operation and troubleshooting.
• Energy-efficient, reducing gas consumption significantly.

Cons

• Limited maximum temperature range (124°F).

2. Suburban 5382A ST-60 Electric Tankless RV Water Heater

The Suburban 5382A ST-60 Tankless Water Heater combines efficiency and safety to provide a reliable hot water solution for RV enthusiasts. Designed with a 6-gallon capacity, this unit delivers instant hot water on demand, eliminating the need for storage tanks. With a maximum temperature of 131°F, it allows users to mix cold and hot water to achieve their desired temperature, offering comfort and convenience.

Safety is a standout feature of this model. It includes Flame Out Protection, which immediately cuts the gas supply in the event of low propane pressure or burner malfunctions, ensuring safe operation. Additionally, the Automatic Fan Monitoring system shuts off the gas supply if airflow or combustion air supply is interrupted. The Scald Protection system, featuring an internal high-temperature kill switch, protects against thermostat malfunctions, making it a reliable choice for families.

The unit’s wall-mount design ensures easy installation and saves space, making it ideal for RV setups.

Key Features

1. 6-gallon capacity for instant hot water.
2. Maximum temperature of 131°F for comfortable customization.
3. Flame Out Protection ensures safety in case of low propane pressure.
4. Automatic Fan Monitoring prevents combustion interruptions.
5. Scald Protection prevents overheating due to thermostat failure.

Pros

• Instant hot water on demand.
• Comprehensive safety features for reliable operation.
• Wall-mounted design saves space.
• User-friendly with customizable temperature settings.
• Easy to install for RV use.

Cons

• Door and remote control not included.

How to Choose the Best Electric Tankless Water Heater for RV?

Traveling in an RV is all about freedom, adventure, and comfort. But let’s face it—having access to hot water can make or break your on-the-road experience. Whether you’re washing dishes, taking a refreshing shower after a long hike, or simply needing hot water for your morning coffee, the right electric tankless water heater is essential.

Understand Your RV’s Hot Water Needs

Before diving into the technical details, start by evaluating your specific requirements.

• How many people will use hot water? If you’re a solo traveler, your needs will differ from a family of four.
• What appliances need hot water? Think about sinks, showers, and even washing machines if you have one.
• How often do you use hot water? Regular use will require a more robust system than occasional trips.

By answering these questions, you’ll create a clear picture of the type of water heater you need.

Check Your RV’s Power Availability

Not all RVs are created equal, and power capacity plays a significant role in selecting an electric tankless water heater. Most electric models require a dedicated power supply, so you’ll need to ensure your RV’s electrical system can handle it.

• Voltage and Amperage: Most RVs run on 120V, but confirm your electrical panel’s capacity to avoid overloading. Look for heaters with power requirements that match your RV’s specifications.
• Energy Efficiency: Opt for models that are energy-efficient to minimize power consumption, especially if you often rely on battery power or solar panels.

Flow Rate: How Much Hot Water Do You Need?

The flow rate determines how much hot water the unit can deliver per minute. This is usually measured in gallons per minute (GPM).

• Single Fixture vs. Multiple Fixtures: A unit with a flow rate of 1.5 GPM may suffice for a single shower, but if you want to run a sink and a shower simultaneously, look for a model with at least 2.5 GPM.
• Seasonal Adjustments: Keep in mind that colder water temperatures in winter may reduce the effective flow rate. Look for heaters with temperature adjustment features to maintain comfort year-round.

Consider Size and Installation Space

Space is always at a premium in an RV, so compact and lightweight models are ideal.

• Wall-Mounted Options: Many electric tankless water heaters can be mounted on a wall, saving valuable floor space.
• Ease of Installation: Look for models that are easy to install, especially if you plan to set it up yourself. Some units are specifically designed for RVs, with installation kits included.

Prioritize Durability and Safety

Your RV faces constant movement and vibration, so durability is non-negotiable.

• Corrosion-Resistant Materials: Look for water heaters made from high-quality materials like stainless steel or those with anti-corrosion coatings.
• Safety Features: Overheat protection, automatic shut-off, and water leak sensors are must-haves for peace of mind on the road.

Don’t Forget About Temperature Control

Flexibility is key when it comes to adjusting water temperature.

• Digital Displays: Models with digital temperature displays offer precise control, so you can set the water temperature to your liking.
• Memory Settings: Some advanced units let you save temperature preferences, making operation even easier.

Budget: Balance Cost and Features

While it’s tempting to go for the cheapest option, remember that quality and reliability matter more in the long run.

• Initial Cost vs. Long-Term Savings: High-efficiency models may cost more upfront but save you money on energy bills over time.
• Warranty Coverage: A solid warranty is a good indicator of product quality and manufacturer confidence. Aim for at least a 2-year warranty.

Frequently Asked Questions When Selecting the Best Electric Tankless Water Heater for RV

1. What is an electric tankless water heater, and how does it work in an RV?

An electric tankless water heater heats water on demand rather than storing it in a tank. When water flows through the unit, it is heated instantly using electric heating elements. This design makes it compact and energy-efficient, which is ideal for RVs where space and power are limited.

2. Why should I choose an electric tankless water heater over a traditional water heater for my RV?

Electric tankless water heaters are preferred for RVs because they:

• Save space due to their compact size.
• Provide a continuous supply of hot water, unlike tank models with limited capacity.
• Are energy-efficient, reducing power consumption.
• Eliminate the need to store and heat water constantly, which can save on energy costs.

3. What factors should I consider when choosing an electric tankless water heater for my RV?

When selecting the best unit for your RV, consider:

• Flow Rate (GPM): Choose a model that matches your water usage needs. For one shower, 1.5 GPM is sufficient, while multiple fixtures may require 2.5 GPM or more.
• Power Availability: Ensure your RV’s electrical system can handle the unit’s power requirements, usually 120V and specific amperage.
• Size and Weight: Look for a compact, lightweight model that fits in your RV.
• Durability: Select a unit built with robust materials to withstand road vibrations.
• Temperature Control: Opt for models with precise temperature adjustment features.

4. Can I install an electric tankless water heater in my RV by myself?

Yes, many models are designed for easy DIY installation. However, it’s important to:

• Check your RV’s electrical capacity before installation.
• Follow the manufacturer’s instructions carefully.
• Ensure all water and electrical connections are secure to prevent leaks or electrical issues. If you’re unsure, it’s always wise to hire a professional for safe installation.

5. How much power does an electric tankless water heater require in an RV?

The power requirement varies by model. Most RV-compatible units operate on 120V and require between 15-30 amps. Make sure your RV’s electrical system has enough capacity, and consider upgrading your system or using a generator if needed.

6. Are electric tankless water heaters safe for RV use?

Yes, they are safe as long as you choose a model designed for RVs and install it properly. Look for units with built-in safety features such as:

• Overheat protection.
• Automatic shut-off.
• Leak detection sensors.
  These features ensure the safe operation of the water heater even in a mobile setting.

7. What is the average lifespan of an electric tankless water heater in an RV?

With proper maintenance, an electric tankless water heater can last 10-15 years. Regularly descaling the unit to remove mineral buildup and checking for any leaks or wear can extend its lifespan.

8. How do I maintain an electric tankless water heater in my RV?

Maintenance is simple and ensures the longevity of your unit:

• Descaling: Flush the unit every 6-12 months to remove mineral deposits, especially if you use hard water.
• Filter Cleaning: Check and clean the inlet water filter regularly to prevent clogs.
• Inspect for Leaks: Periodically check for any water leaks around the connections.
• Follow Manufacturer Instructions: Adhere to the care guidelines provided in your heater’s manual.

9. Are electric tankless water heaters energy-efficient in RVs?

Yes, they are highly energy-efficient because they heat water only when needed, reducing standby energy losses. This efficiency is particularly important in RVs, where conserving power is crucial, especially if you rely on batteries or solar panels.

10. Can an electric tankless water heater work in cold climates while RVing?

Yes, but you need to select a model designed for colder water temperatures. Many units specify their temperature rise capabilities. For example, a model might be able to heat water from 40°F to 120°F at a specific flow rate. If you often camp in cold climates, choose a unit with a higher heating capacity to ensure a comfortable water temperature.

11. What are the best brands for electric tankless water heaters for RVs?

Some of the most trusted brands include:

• EcoSmart: Known for compact, efficient models.
• Bosch: Offers affordable, reliable options.
• Stiebel Eltron: Provides premium features and excellent performance.
  These brands cater to a range of budgets and requirements, making them popular among RV enthusiasts.

12. How much does an electric tankless water heater for an RV cost?

Prices range from $150 to $800 depending on the brand, features, and flow rate. While budget options are available, investing in a high-quality model ensures durability, efficiency, and better performance in the long run.

13. Can I use an electric tankless water heater with solar power in my RV?

Yes, you can, but make sure your solar setup provides enough power to support the water heater’s energy requirements. Pairing the unit with a battery system ensures consistent performance even during cloudy days or at night.

14. What are some common mistakes to avoid when choosing an electric tankless water heater for an RV?

• Overlooking Flow Rate Needs: Choosing a unit with too low a flow rate can result in insufficient hot water.
• Ignoring Power Requirements: Not verifying your RV’s electrical capacity can lead to system overloads.
• Skipping Safety Features: Avoid models without essential safety features like overheat protection.
• Buying Based on Price Alone: Cheap units may lack durability and performance, costing you more in the long run.

Conclusion

Choosing the best electric tankless water heater for your RV doesn’t have to be overwhelming. By focusing on your specific needs—like flow rate, power compatibility, and space—you can find the ideal unit to make every trip more comfortable. The models we’ve reviewed here represent the best in the market, combining efficiency, durability, and value for money.

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