10 Best Tankless Water Heaters Electric of 2025

Tested and Reviewed: Top 10 Tankless Water Heaters Electric deals with expert ratings from 8.1 to a perfect 10

June 2025 Edition

Editor's Choice

9.7

Save 40%

EcoSmart

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

40% Off

Editor's bottom line:

“This tankless water heaters electric is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.Amperage Draw : 54 A.Special Features: Energy Efficient
Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution

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Picked by 162 people today

9.5

Rheem

Rheem 8kW 240V Tankless Electric Water Heater

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Main Highlights

ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
8kW Model Flow Rate: up to 1.95 GPM
Side 1/2" NPT water connections
On demand; continous hot water

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9.5

Rheem

Rheem 11kW 240V Tankless Electric Water Heater

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Main Highlights

ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
11kW Model Flow Rate: up to 2.68 GPM
Side 1/2" NPT water connections
On demand, consistent and continuous hot water

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9.2

Save 31%

Stiebel Eltron

Stiebel Eltron Tankless Water Heater – Tempra 20 Plus – Electric, On Demand Hot Water, Eco, White

31% OffFree Shipping

Main Highlights

CONTINUOUS FLOW Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. Itll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again
SPACE & ENERGY SAVER Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Savings monitor even shows how much you save on energy costs
EASY OPERATION Electronic switch activates the hot water heater and its noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work
TEMPRA 20 PLUS This specific model is 19.2kW, 240V, requires a min recommended electric service of 125 A, and offers an output water temperature of 68° to 140°F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
WARRANTIES INCLUDED Stiebel Eltrons top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase

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9.0

xwdzswgs

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

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Main Highlights

MINI INSTANT HOT WATER HEATER - This 110 volt water heater is equipped with state-of-the-art technology, with 3000W power, LED display. The electric tankless water heater 110v can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in 3-5 seconds, saying goodbye to long waiting times for hot water. The tankless electric water heater can set Fahrenheit or Celsius degrees by holding a power button for 6 seconds.
SAFETY INTELLIGENCE RELIABLE - This under sink water heater has multiple protection functions. IPX4 waterproof, leakage protection, dry-burning protection, automatic power-off in over-temperature and inactive states. Tankless hot water heater electric can meet your outlet temperature requirement. Large water flow means low temperature and small water flow means high temperature. TIP: Install vertically to avoid malfunction of the heating elements (E2).
LIGHTWEIGHT PORTABLE DESIGN - This small water heater compact design, is suitable for installation in the bathroom, kitchen under the sink, etc. The on demand water heater adopts a wall-mounted design, freeing up valuable space for your home, enjoy hot water at any time. This instant hot water heater under sink qualifies for ETL standard, you can expect the outstanding performance of this point of use water heater in the coming years.
EASY TO INSTALL AND APPLICATION - This under sink instant water heater comes with premade fixing screw holes, an English manual, and 1/2 inch NPT standard interface. This small electric water heater is ideal for spaces such as kitchens, apartments, bathrooms, RVs, and camping. The comfortable water temperature generated by this 110V water heater is suitable for cleaning food, bowls, clothes, face, hands, etc.
QUALITY WARRANTY & IMPORTANT NOTE - We provide a 24-month warranty for the electric water heater tankless. If you encounter any after-sales issues regarding the small hot water heater, you can always contact our electric tankless water heaters support team. Tip: This electric hot water heater is recommended to be connected with wires with a cross-sectional area of 2.5 square millimeters, and connected to trip switches of over 32a for use.

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8.8

ECOTINYMACH

ECOTINYMACH Tankless Water Heater Electric 110V, 5000W Instant Water Heater Under Sink, Conversion Between Fahrenheit and Celsius, Remote Control

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Main Highlights

Easy Operation: The ECOTINYMACH 110V tankless water heater electric is designed for user-friendly and effortless operation, making your life easier and more comfortable.
Instant Hot Water: Say goodbye to the waiting time for hot water. With this tankless water heater, you can enjoy hot water anytime, anywhere at your home.
Fahrenheit and Celsius Conversion: Featuring seamless conversion between Fahrenheit and Celsius, this water heater lets you choose the unit of measure that you're comfortable with.
Energy Saving: The ECOTINYMACH 110V electric tankless water heater only operates when hot water is needed, reducing energy consumption and saving on your electricity bill.

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8.6

ECOTOUCH

Tankless Water Heater Electric, ECOTOUCH 6kW 240V Point of Use Water Heater on Demand Water Heater Instant Hot Water Heater Electric ETL Certificated Self-modulation ECO60SE White

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Main Highlights

This tankless water heater electric 6kW is a perfect alternative option for those who are unhappy with small water heater 3.5kW, the unit provides sufficient hot water for sink faucet or similar fixtures as a point of use water heater, also it works as a great inline supplement for the main heater far away. And the ECO60SE on demand water heater is specially compact designed for easy installation in any limitted space you need
The tankless water heater ECO60SE comes with trust-worthy self-modulation technology and unique self-learning & evolvement tech, this helps to get smart and exact power adjustment during powerful heating up process, cutting energy cost by 60%. Now we get you indeed instant heating on demand without long waiting and the stable temp hot water flow will sure bring your experience to next level
Being the first to introduce electric tankless water heater with cast aluminum heater, ECOTOUCH has faith in this special tech always, the ECO60SE' sparated electric and water lines greatly avoid electric leakage risk and corrosion of these typical immersed heating elements. Also, you could expect barely no scale built-up and zero maintenance for years to come
Newly updated and applied with multiple protections, such as leakage protection, over heating protection and IPX4 waterproof design, every piece electric water heater tankless ECO60SE goes through strict tests during manufacturing to ensure 100% safety of yours, also it is listed by ETL and qualifies for UL standards, great inverstment for a small instant hot water heater that makes you feel completely at ease
This electric water heater ECO60SE is recommended for a faucet or similar fixture that takes less than 1.0GPM hot water if you use in northern region, while you could use it for 2 faucets in the southern part. Please verify it is the right size for you: pipe fittings:1/2" NPT, 6kW @ 240V(no plug) and it requires 1X30AMP Double Pole Breaker and 10AWG/2 wires with Grounding

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8.3

Orbek

18kW Tankless Water Heater Electric, ORBEK 240 Volt On Demand Instant Hot Water Heater, with LED Digital Display, ETL Certified, Up to 4.8 GPM for 2-3 Point of Use throughout the Whole House

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Main Highlights

Instant Hot Water Supply: Orbek electric tankless water heater can provide up to 4.8 GPM of endless hot water on demand and ensure comfortable hot water for 2-3 points of use simultaneously throughout the whole house
High Energy Efficient: With water-electricity separation, this hot water heater reduces scale and corrosion. It delivers endless hot water in just 3 seconds with 98% efficiency, cutting electricity costs by up to 60%
Comprehensve Security Protection: Orbek tankless water heater features several safeguards, including leakage, over-temperature, high voltage, and dry-heating protection. Each unit undergoes strict testing and is ETL certified to ensure 100% safety for you and your family
LED Digital Display: Clear and easy to read, with real-time updates. Powered by an intelligent temperature control chip that performs 200,000 calculations per second, this instant tankless water heater ensures precise temperature adjustments within 1, supports a wide range from 86-140, and delivers a steady supply of hot water
Easy to Install: Orbek 18KW tankless water heater electric requires 2 x 240V/40A two-pole breakers and 2 sets of 8 AWG wires to be connected. Both the inlet and outlet use standard 3/4" NPT male connectors, making it compatible with most household water pipes. Its compact size of 14.2"H x 9.5"L x 3.1"W takes up almost no space
After-Sale Service: We offer 2 years returns & exchange support along with long-term professional technical consulting services

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8.1

Rheem

Rheem 18kW 240V Tankless Electric Water Heater, Gray

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Main Highlights

External digital thermostatic control with LED display (+/1 degree accuracy)
Most advanced self-modulation, adjust power to meet hot water demand
Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
Simple installation bottom 3/4 inch NPT water connections
Threaded for easy replacement, simple installation, digital temperature display

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8.1

Rheem

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

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Main Highlights

ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
24kW Model Flow Rate: up to 5.9 GPM for RTEX-24
Bottom 3/4" NPT water connections
On demand, consistent and continuous hot water

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Our Best Overall Choice

Best Choice

9.7

EcoSmart

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

40% Off

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.Amperage Draw : 54 A.Special Features: Energy Efficient
Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution

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