When you’re traveling in an RV, comfort and convenience can make all the difference. One feature that significantly enhances both is having reliable hot water on demand. Traditional RV water heaters often rely on bulky tanks, take up too much space, and run out of hot water quickly. That’s where RV tankless electric water heaters come in. These compact units provide continuous hot water without the need for storage tanks, ensuring you never have to suffer through a cold shower again—whether you’re parked in the mountains or camping by the beach.

Because the market offers many models with varying specifications, installation requirements, and performance levels, choosing the best one can be confusing. In this guide, we’ve curated the top RV tankless electric water heaters based on heating efficiency, ease of use, safety features, size, and durability. So whether you’re renovating your RV, upgrading from a standard heater, or going on a full-time adventure, this guide will help you make the right choice.

Best RV Tankless Electric Water Heaters

1. EcoSmart ECO 11 Electric Tankless Water Heater

Delivers between 1.3 and 3.1 gallons per minute (GPM) depending on inlet water temperature
Ideal for small RVs with minimal hot water demands
Self-modulating technology adjusts energy use based on water flow
Digital temperature control allows precision settings in 1-degree increments
Compact and lightweight—can be wall-mounted to save space
Additionally, the unit is energy efficient and certified by the Department of Energy
Requires a 60-amp double pole breaker with #6 AWG wire
Designed for climates where inlet water temperatures are above 67°F
Lifetime warranty for residential use (limited for RV setups)
Perfect for solo travelers or couples looking to reduce energy costs

2. Stiebel Eltron DHC-E 12 Tankless Electric Water Heater

Delivers consistent flow rates of up to 2.0 GPM
Advanced flow control automatically adjusts water pressure to maintain temperature
Sleek, compact design fits easily into RV utility closets or under sinks
Features an intuitive digital temperature display with dial selector
Internal copper heating system for fast, efficient performance
Moreover, thermal safety cut-off prevents overheating
Requires 240 volts and a 50-amp circuit breaker
Known for quiet operation and German-engineered reliability
Designed for long-lasting durability with minimal maintenance
A great option for frequent travelers who prioritize comfort and performance

3. Bosch Tronic 3000T Mini-Tank Water Heater

While technically a mini-tank system, it acts like a tankless unit due to rapid reheating
Holds up to 2.5 gallons with quick recovery rate, ideal for compact RVs
Plugs into a standard 120V outlet and mounts easily on wall or floor
Glass-lined tank improves durability and corrosion resistance
Also, thermal efficiency rating is 98%, making it one of the most energy-saving units
Installs under sinks for instant hot water in kitchens or bathrooms
Weighs just 15.5 lbs and includes a pressure relief valve
Works well in tandem with larger tankless units to reduce waiting time
Best for RVers who want quick hot water access at specific points
A smart supplement or standalone heater for short-term use

4. Eemax EEM24013 Electric Tankless Water Heater

Delivers up to 3.0 GPM, enough for a shower and sink running simultaneously
Durable heating elements made from copper for rapid temperature rise
Compact unit with wall-mount design for saving interior RV space
Digital temperature dial with LED display
Furthermore, equipped with advanced self-modulating technology
Safety shut-off and over-temperature protection included
Requires 240V, 13kW, and dual 60A breakers
Great for full-time RV living with frequent hot water use
Easy to install with standard ½” NPT connections
A strong all-around performer with excellent thermal control

5. Camplux TE27 Tankless Electric Water Heater

Specifically built for RV and marine use
27kW system delivers up to 6.5 GPM for large RV households
Dual heating elements ensure instant and consistent hot water
Smart controller with LCD display and remote control function
In addition, includes freeze protection for colder climates
Built-in leakage and dry heating protection systems
Requires 240V and a 3x40A circuit breaker setup
Suitable for high-demand applications—multiple bathrooms or extended stays
Modern, stylish housing with LED diagnostics for real-time operation status
Best choice for families or RVers who demand maximum capacity and control

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

Choosing the right tankless electric water heater for your RV involves evaluating several key factors. Because RV setups differ significantly in size, water usage, and power availability, one model may be better suited than another based on your personal needs.

1. Flow Rate (GPM)

GPM, or gallons per minute, determines how much hot water the unit can deliver
1–2 GPM is suitable for single-person use (sink or shower)
2–4 GPM supports dual usage (shower + sink)
4+ GPM is best for families with multiple hot water demands
Therefore, match your GPM needs to your lifestyle and occupancy.

2. Power Requirements

Most tankless water heaters require 120V or 240V electric setups
Check your RV’s breaker and wiring capacity
Some high-performance models need 60A or 80A breakers
If your RV is solar-powered, opt for lower wattage models
Incorrect electrical configuration may damage the unit or your RV system.

3. Installation Space

RVs are compact—ensure the heater fits in your available space
Wall-mountable and under-sink designs maximize utility
Flexible connection options ease the installation process
Always measure and plan before buying.

4. Temperature Controls

Look for models with digital thermostats and adjustable settings
Advanced systems automatically modulate based on demand
Simpler units may only have preset temperatures
Therefore, precise control enhances both comfort and energy savings.

5. Safety Features

Vital features include overheat protection, auto shut-off, and leak detection
Freeze protection is important for cold-weather camping
Anti-scald technology is especially useful for families with kids
The more safety built in, the more peace of mind you get.

6. Energy Efficiency

Tankless heaters are generally more efficient than tank models
Self-modulating units only draw power as needed
Models with Energy Star certification help reduce utility costs
Energy efficiency is crucial for eco-conscious RVers and off-grid travelers.

7. Durability and Build Quality

Stainless steel and copper heating elements last longer
Avoid plastic housing in high-wattage models
Consider warranty length and brand reputation
Long-term RV users should invest in rugged, tested systems.

FAQs

Q1: Can I install a residential tankless heater in my RV?
Only if it fits your RV’s electrical and space limitations. Most residential models require more power and space than RVs can offer.

Q2: Do tankless water heaters work instantly?
Yes, most begin heating as soon as water starts flowing, though it may take a few seconds for hot water to reach the tap.

Q3: Are electric models better than propane tankless water heaters for RVs?
Electric models are easier to install and maintain, but propane units may be better for boondocking or off-grid use due to lower energy demands.

Q4: How do I winterize a tankless electric heater?
Drain all water from the system and use anti-freeze or built-in freeze protection features if available.

Q5: Will a tankless unit provide hot water for the entire RV?
Yes, if it has sufficient GPM capacity. Otherwise, you may need to prioritize certain outlets or stagger usage.

Q6: Are these heaters noisy?
Most electric tankless units are quiet, especially compared to propane systems.

Q7: Can I use my tankless heater while the RV is in motion?
It’s not recommended unless specifically designed for mobile use and securely mounted with stable plumbing.

Q8: How long do these heaters typically last?
With proper care, most RV tankless electric heaters last 8–12 years.

Extra Tips for RV Water Heater Users

1. Use a Water Pressure Regulator

Avoid damage by installing a water pressure regulator at the RV inlet. High campground pressure can overload the heater.

2. Install a Sediment Filter

Protect the heater’s internal components from mineral buildup with a pre-filter. Especially useful for well water or older campgrounds.

3. Test Voltage Before Installation

Always confirm your RV’s available voltage and breaker capacity before installing any unit.

4. Don’t Oversize the Heater

Too much GPM means wasted energy and difficult wiring requirements. Choose based on need, not maximum capacity.

5. Check for Remote Control Features

Some models include remote thermostats or wireless apps for temperature control. Handy for hard-to-reach installations.

6. Flush Regularly

Descale the heating element every 6–12 months with white vinegar to maintain efficiency.

7. Pair with Low-Flow Fixtures

Using low-flow shower heads and faucets helps maintain pressure and consistent heat.

RV Tankless Heater Comparison Table

Use Case	Recommended Model	Max GPM	Key Feature
Compact RVs	EcoSmart ECO 11	3.1	Self-modulating technology
Full-Time RVers	Eemax EEM24013	3.0	Digital thermostat + safety shut-off
Large RV Families	Camplux TE27	6.5	Dual heating + LCD display
Budget-Friendly	Bosch Tronic 3000T	2.5	Mini-tank with fast reheat
Quiet Operation	Stiebel Eltron DHC-E 12	2.0	German engineering + silent design

Conclusion

RV tankless electric water heaters revolutionize how you experience life on the road. By eliminating the need for bulky tanks and delivering endless hot water on demand, they enhance both convenience and energy efficiency. Whether you’re a solo traveler looking for a compact option or a family needing robust performance, there’s a perfect heater for your setup.

Therefore, consider your space, power capabilities, and hot water usage when making a decision. With the right heater, your RV becomes not just a vehicle—but a comfortable, fully functional home on wheels.