5 Best Electric Tankless Hot Water Heater for RV [In 2025]

Investing in the best electric tankless hot water heater for your RV can significantly enhance your camping experience, providing instant access to hot water whenever you need it. These compact and efficient units offer several advantages over traditional tank-style water heaters, making them a popular choice for RV owners. In this comprehensive review, we’ll explore the top electric tankless hot water heaters on the market, highlighting their features, pros, and cons to help you make an informed decision.

Tankless Water Heater Electric 110V, 3000W Under Sink Instant On Demand Hot Water Heater with Digital Display for RV Kitchen

Overview

The Tankless Water Heater Electric 110V from DOYXC is a compact and efficient unit that delivers instant hot water on demand. With its advanced technology, this 110-volt water heater can heat water in just 3-5 seconds, eliminating the long wait times associated with traditional tank-style heaters.

Specs

• Voltage: 110V
• Power: 3000W
• Maximum temperature: 55°C/131°F
• Dimensions: Compact design for under-sink installation
• Safety features: IPX4 waterproof, leakage protection, dry burning protection, automatic power-off

Pros

• Instant hot water delivery, no preheating required
• Compact and space-saving design
• Multiple safety features for reliable operation
• Digital display for temperature monitoring
• Convertible temperature scale (Celsius or Fahrenheit)

Cons

• Requires a dedicated 32A circuit breaker for proper installation
• May not provide enough hot water for multiple simultaneous users

BOSCH Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) – Eliminate Time for Hot Water – Shelf, Wall or Floor Mounted

Overview

The BOSCH Electric Mini-Tank Water Heater Tronic 3000 T is a compact 4-gallon point-of-use water heater that can be installed under your sink, providing hot water where and when you need it. With its fast recovery rate, this unit eliminates the long wait times associated with traditional tank-style heaters.

Specs

• Capacity: 4 gallons
• Voltage: 120V
• Power: 12A
• Dimensions: 13.75″ H x 13.75″ L x 13.5″ D
• Mounting options: Shelf, wall, or floor

Pros

• Provides hot water on demand, eliminating wait times
• Compact size for under-sink installation
• Glass-lined tank for durability and insulation
• Temperature control dial for adjusting water temperature
• Temperature-and-pressure relief valve for enhanced safety

Cons

• May not provide enough hot water for multiple simultaneous users
• Requires annual anode rod inspection and replacement for optimal performance

Electric Tank Water Heater-8 Gallon Under Sink Instant Hot Water for RV, Camper, Kitchen, Food Truck, 120V 1500W, Wall or Floor Mounted

Overview

The Electric Tank Water Heater from Feelrogast is an 8-gallon under-sink instant hot water heater designed for RVs, campers, kitchens, and other compact spaces. With its rapid heating capabilities and adjustable temperature range, this unit provides a reliable and efficient solution for your hot water needs.

Specs

• Capacity: 8 gallons
• Voltage: 120V
• Power: 1500W
• Temperature range: 86-167°F
• Mounting options: Wall, rack, or floor

Pros

• Rapid heating and reheat for instant hot water
• Durable stainless steel construction with enamel coating
• Multiple safety features, including leakage protection and high-temperature limiting device
• Versatile mounting options for easy installation
• Compact design for space-saving under-sink placement

Cons

• May not provide enough hot water for simultaneous high-demand usage
• Requires a dedicated 20A circuit breaker for proper installation

RUNSAIL® 65,000 BTU RV Tankless Water Heater without Door, Endless Hot Water Supply,3.96 GPM Propane Gas, 3 Optional Door Sizes 15″x15″, 15″x18″ and 18″x18″ for Refitment,Compatible with All RVs

Overview

The RUNSAIL RV Tankless Water Heater is a high-efficiency propane-powered unit that delivers a continuous supply of hot water for your RV. With its 65,000 BTU burner and 3.96 GPM capacity, this tankless heater can meet the hot water needs of even the busiest RV families.

Specs

• Fuel type: Propane
• BTU output: 65,000
• Maximum flow rate: 3.96 GPM
• Temperature range: 95-123°F
• Door size options: 15″x15″, 15″x18″, 18″x18″

Pros

• Provides a continuous supply of hot water, eliminating wait times
• High-efficiency burner for optimal energy usage
• Precise temperature control to prevent scalding
• Compatibility with a variety of RV door sizes for easy replacement
• Built-in pressure relief valve for safety and reliability

Cons

• Requires propane fuel, which may be less convenient than electric options
• May be more complex to install compared to electric tankless heaters

FOGATTI RV Tankless Water Heater, InstaShower 7, 3 Optional Door Sizes 15″x15″, 15″x18″ and 18″x18″ for Refitment, DC 12V, Optimized Summer Comfort Performance, Ideal for RVers’ Family Use

Overview

The FOGATTI RV Tankless Water Heater, InstaShower 7, is a high-performance propane-powered unit designed to meet the hot water needs of RV families. With its 48,000 BTU output and ability to deliver 2.5 gallons of hot water per minute, this tankless heater provides instant and continuous hot water for your RV.

Specs

• Fuel type: Propane
• BTU output: 48,000
• Maximum flow rate: 2.5 GPM
• Temperature range: 95-123°F
• Door size options: 15″x15″, 15″x18″, 18″x18″

Pros

• Delivers instant and continuous hot water for RV family use
• Optimized for high-altitude performance up to 9,800 feet
• Staged combustion technology for consistent temperatures and reduced scalding risk
• Pre-installed 150 PSI pressure relief valve for added safety
• Includes a 6.6-foot smart remote for easy temperature adjustments

Cons

• Requires propane fuel, which may be less convenient than electric options
• May be more complex to install compared to electric tankless heaters

Buying Guide

Factors to Consider When Choosing an Electric Tankless Hot Water Heater for Your RV

Capacity and Flow Rate

• Consider the size of your RV and the number of people using hot water simultaneously.
• Look for units with a flow rate that can meet your peak hot water demand.

Heating Power and Efficiency

• Evaluate the heating capacity (measured in watts or BTUs) to ensure it can provide the desired water temperature.
• Compare the thermal efficiency of different models to maximize energy savings.

Safety Features

• Look for units with safety features like leakage protection, dry burning protection, and automatic shut-off.
• Ensure the heater is properly installed with the recommended electrical wiring and circuit breaker.

Mounting and Installation

• Consider the available space in your RV and choose a unit that can be easily mounted (under-sink, wall, or floor).
• Verify the connections and fittings are compatible with your RV’s plumbing system.

Warranty and Customer Support

• Check the manufacturer’s warranty and ensure they offer reliable customer support in case of any issues.
• Read reviews from other RV owners to gauge the overall quality and customer satisfaction.

FAQ

1. How do electric tankless water heaters compare to traditional tank-style heaters in terms of energy efficiency?

Electric tankless water heaters are generally more energy-efficient than traditional tank-style heaters. They only heat water on demand, eliminating the energy waste associated with continuously maintaining the temperature of a large water tank.

2. Can an electric tankless water heater provide enough hot water for multiple users in an RV?

The ability to serve multiple users simultaneously depends on the unit’s flow rate and heating capacity. Larger RVs with higher hot water demands may require a more powerful tankless heater or the use of multiple units to ensure an adequate supply of hot water.

3. What are the key differences between electric and propane-powered tankless water heaters for RVs?

Electric tankless heaters are generally more convenient and easier to install, as they don’t require a dedicated propane supply. Propane-powered units, on the other hand, can provide higher BTU outputs and may be better suited for larger RVs or those with high hot water demands.

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

Regular maintenance typically includes cleaning the water inlet filter, checking for scale buildup, and inspecting the electrical connections. It’s also important to follow the manufacturer’s recommendations for anode rod replacement (if applicable) to prevent tank corrosion.

5. Can an electric tankless water heater be used in cold weather or high-altitude environments?

Some electric tankless heaters are designed with features like high-altitude modes and antifreeze protection to ensure reliable performance in challenging environments. It’s essential to check the manufacturer’s specifications and ensure the unit is compatible with the conditions in your area.

In conclusion, electric tankless hot water heaters offer a range of benefits for RV owners, including instant hot water, energy efficiency, and compact design. By carefully considering factors like capacity, heating power, safety features, and installation requirements, you can find the best electric tankless water heater to enhance your RV’s hot water system and improve your overall camping experience.