10 Best Electric Tankless Water Heater of 2026

Last updated on 04/04/2026
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Best Choice
1
9.7
Exceptional
Westinghouse 14kW 240V Smart WiFi Tankless Water Heater Electric, Compatible with Alexa & Google Home, ETL Certified, IPX4, Gray - Upgrade (APOLO-2.0)
Westinghouse

Westinghouse 14kW 240V Smart WiFi Tankless Water Heater Electric, Compatible with Alexa & Google Home, ETL Certified, IPX4, Gray - Upgrade (APOLO-2.0)

Why we love it
  • Instant hot water on demand.
  • Smart Wi-Fi voice control features.
  • Compact design saves valuable space.
Main Highlights
  • 【IMPORTANT NOTES】up to 3.38 GPM for APOLO-14kW. Activation flow: 0.5 GPM. Amperage (amps): 59A. The product works and is compatible with 1 X 60 AMP (DP) breakers and 1 X 6 AWG wire. Bottom 1/2" NPT water connections
  • 【INSTANT HOT WATER 】 Westinghouse 14kW electric tankless water heater delivers continuous hot water on demand — perfect for simultaneous use at 1 shower + 1 sink. Eliminate waiting time and temperature fluctuations during showers, dishwashing, or handwashing.
  • 【SMART WI-FI VOICE CONTROL】 Control water temperature remotely via the app or voice commands (Alexa & Google Home compatible). Adjust settings from 86°F to 140°F in 1° increments. The LED display shows real-time status for easy monitoring.
  • 【ETL SAFETY CERTIFIED & DURABLE DESIGN】 ETL certified with 4-layer protection (leakage, overheat, dry-fire, high voltage). Features separate water-electricity pathways to prevent corrosion and scaling, ensuring low maintenance and extended lifespan.
  • 【SPACE-SAVING & EASY INSTALLATION】 Compact design (14.2" H x 9.5" W x 3.5" D) mounts flush to walls, freeing floor space. Includes 1/2" NPT connections and 60A breaker compatibility.
  • 【PERFECT FOR APARTMENTS & HOMES】 This 14kW, 240V electric tankless water heater efficiently delivers up to 3.38 GPM flow, providing consistent hot water for 1 to 3 points of use simultaneously in apartments, homes, or offices.
9.7
Exceptional
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🛡️Trusted by 100M+ UsersWhy?
Best Value
2
9.6
Superb
Save 13%
Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, 28.8kW, On Demand Hot Water, Eco, White, Made in Germany
Stiebel Eltron

Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, 28.8kW, On Demand Hot Water, Eco, White, Made in Germany

13% Off
Why we love it
  • Unlimited hot water availability.
  • Sleek, space-saving design.
  • Easy temperature adjustments.
Main Highlights
  • On demand a continuous and unlimited supply of hot water
  • Sleek design saves space and no venting required, It also features two different temperature memory presets, making it easy to adjust for personalized needs.
  • Requires hard-wired 240 or 208-volt electric service, with a maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts
  • Requires 3 separate dedicated 40 amp breakers with 8 gauge copper wiring, and a minimum of 200 amp total service to the residence
9.6
Superb
Save 13%
Amazon Logo
3
9.4
Superb
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Rheem

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

Why we love it
  • Precise temperature control available.
  • Efficient self-modulating power function.
  • Consistent hot water supply guaranteed.
Main Highlights
  • ELECTRICAL REQUIREMENTS: 3 x 40 AMP Double Pole Breakers Required. 200 AMP Household service recommended. Ensure your home can accomodate the power supply and that enough space is available in your breaker panel for this unit. RTEX-24 model is 100A, 24kw, 240V.
  • PROVEN PERFORMANCE: Continuous hot water when you need it for the whole home (review performance guide image to confirm this water heater will provide the hot water needed based on geographic location). Ground water temperature impacts temperature rise and gallons per minute.
  • EASILY ADJUSTABLE: ON/OFF Dial Control with adjustable digital temperature display allows for adjustments in 1-degree increments from 80-140 degrees F.
  • EFFICIENT: Tankless electric water heaters save space, energy, money, and require no venting.
9.4
Superb
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4
9.3
Superb
Save 8%
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Rheem

Rheem 18kW 240V Tankless Electric Water Heater, Gray

8% Off
Why we love it
  • Precise digital temperature control.
  • Energy-efficient self-modulation feature.
  • User-friendly installation process.
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
9.3
Superb
Save 8%
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5
9.1
Superb
Save 16%
Wintemp 27kW Tankless Water Heater Electric 240V, On Demand Hot Water, Automatically Maintains Water Temperature, Up to 6.5 GPM, WiFi Control, ETL Eertified, Eco, WM27V Plus
WINTEMP

Wintemp 27kW Tankless Water Heater Electric 240V, On Demand Hot Water, Automatically Maintains Water Temperature, Up to 6.5 GPM, WiFi Control, ETL Eertified, Eco, WM27V Plus

16% Off
Why we love it
  • Endless hot water supply.
  • Smart WiFi control.
  • Compact wall mount design.
Main Highlights
  • Important Note: Before purchasing, please ensure this unit meets your installation requirements. The WM27V model is rated at 27kW (240V) with a maximum current of 113A. It requires 3 × 40 Amp double-pole breakers and 3 sets of 8 AWG wiring for installation, with 3/4" NPT water connections
  • Endless Hot Water: Advanced flow control technology automatically maintains water temperature, ensuring maximum efficiency and consistently comfortable hot water. It delivers up to 6.5 GPM of stable hot water output, and if the hot water demand exceeds capacity, the system will slightly reduce the flow to keep the temperature steady-so your hot shower is never interrupted. No more worrying about running out of hot water. Perfect for 2–4 points of use in the home
  • Energy Saving: This unit uses smart self-modulating technology that automatically adjusts power based on real-time water flow and temperature. When the flow decreases, it reduces energy use—and when no hot water is needed, it goes into true zero-energy standby. The water-electricity separation design helps prevent scale buildup and corrosion, keeping the system highly efficient over the long term with little to no maintenance required
  • Space-Saving: The WM27V features a compact wall-mounted design, measuring 15.9" (H) × 13" (W) × 4.2" (D). It saves over 50% more space compared to traditional tank water heaters and can be easily installed in almost any corner of your home. The upgraded internal layout also makes installation simpler and more user-friendly
  • Smart WiFi Control: Control the water temperature remotely via the app (compatible with Smart Home and Tuya Smart). Temperature can be set between 86°F and 140°F. The app also monitors real-time water flow and tracks water and electricity usage. The water heater is activated with an electronic switch and operates silently. It features a digital temperature display and an internal cast-aluminum heating system that handles all the heating efficiently
  • Safe & Reliable: Safety is always WINTEMP’s top priority. The product features multiple safety protections, including leakage protection, overheat protection, and dry-fire protection, and is ETL certified to fully ensure your safety, allowing you to enjoy hot water anytime, anywhere with peace of mind. We also provide a 2-year return and exchange warranty along with long-term professional technical support to give you worry-free use
9.1
Superb
Save 16%
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6
9.0
Superb
Save 6%
EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5
EcoSmart

EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5

6% Off
Why we love it
  • Efficient temperature control technology.
  • Powerful 27 kW performance.
  • Versatile 50/60 Hz compatibility.
Main Highlights
  • Configured for climates where incoming water temperature can reach as low as 37 degrees.
  • Capable of heating nearly 3 gpm.
  • Digital temperature control allows temperature settings in 1 degree increments.
  • Voltage - 240
  • Single phase
9.0
Superb
Save 6%
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7
8.8
Excellent
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
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

Why we love it
  • Instant hot water convenience.
  • Reliable safety features included.
  • Compact and space-saving design.
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 (28°C) (0.3GPM) -131° F( 55 °C) (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.
8.8
Excellent
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8
8.7
Excellent
Save 17%
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
EcoSmart

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

17% Off
Why we love it
  • Endless hot water on-demand.
  • Space-saving, compact design.
  • Highly energy efficient heating.
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
8.7
Excellent
Save 17%
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9
8.7
Excellent
Save 5%
Rheem 11kW 240V Tankless Electric Water Heater
Rheem

Rheem 11kW 240V Tankless Electric Water Heater

5% Off
Why we love it
  • Precise temperature control available.
  • Energy-efficient self-modulating technology.
  • Instantaneous hot water on demand.
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
8.7
Excellent
Save 5%
Amazon Logo
10
8.7
Excellent
110V Tankless Water Heater Electric, 3000W Tankless Electric Water Heater Instant, Under Sink Water Heater with Digital Display, On Demand Hot Water Heaters Electric for Kitchen Washin Bathroom
xwdzswgs

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

Why we love it
  • Instant hot water on demand.
  • IPX4 waterproof protection.
  • Space saving wall mount.
Main Highlights
  • Tankless Electric Water Heater - This electric tankless water heater uses stainless steel and ABS materials, LED display. With 3000W power, the electric water heater tankless can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds. The instant water heater can set Fahrenheit or Celsius degrees by holding the power button for 6 seconds. This 110 volt electric tankless hot water heater uses advanced technology, no need to preheat, eliminating the long waiting time for hot water!
  • Safety Intelligence Reliable - This instant hot water heater has multiple protection functions. IPX4 waterproof, water and electricity isolation, leakage protection, dry boil protection, and automatic power off under overheating and inactivity. On demand water heater with LCD digital display, intelligent detection of working status, and performance. The thermal efficiency of electric hot water heater is as high as 98%, allowing you to enjoy hot water at any time and save energy.
  • Efficient And Compact Design - This tankless hot water heater electric has a compact design, perfect for spaces such as kitchens, apartments, bathrooms, RVs, and camping. The on demand water heater electric adopts a wall-mounted design, freeing up valuable space for your home, enjoy hot water at any time. This instant electric water heater qualifies for ETL standard. You can expect the outstanding performance of this on demand electric water heater in the coming years.
  • Easy To Install And Application - This electric instant hot water heater comes with pre-fabricated set screw holes, English instructions, and 1/2 inch NPT standard connections. This small tankless water heater electric has a simple design and is quick and easy to install, saving time. This tankless water heater electric 110v is ideal for spaces such as kitchens, apartments, bathrooms, RVs, and camping. TIP: Not Suitable for showers (Shower normally requires at least 1.8 GPM).
  • Importance For Installation - ① The 110v point of use water heater for vertical installation only, no horizontal installation is allowed to avoid malfunction of the heating elements (E2). ② The electric tankless water heaters tighten the pipe connectors with Teflon tape to prevent a short circuit (E2). ③ This under sink 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.
  • Outstanding Customer Service - We provide a 24-month warranty for the instant water heater under sink. If you encounter any after-sales issues regarding the mini tankless water heater, you can always contact our small water heater electricsupport team. This 110v tankless water heater electric can be used for an unlimited time. Thanks for choosing our best 110v tankless water heater.
8.7
Excellent
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Related Deals You Might Like for Electric Tankless Water Heater

📊We scanned 192 products
🔍
We reviewed the most relevant Electric Tankless Water Heater offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like Westinghouse, Stiebel Eltron, Rheem, WINTEMP, EcoSmart, xwdzswgs, known for dependable quality and smart design.
⭐
To determine today's best Electric Tankless Water Heater, we analyzed 961 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

Here's what we found:

🏆 #1
Westinghouse 14kW 240V Smart WiFi Tankless Water Heater Electric, Compatible with Alexa & Google Home, ETL Certified, IPX4, Gray - Upgrade (APOLO-2.0)

Our overall winner is Westinghouse 14kW 240V Smart WiFi Tankless Water Heater Electric, Compatible with Alexa & Google Home, ETL Certified, IPX4, Gray - Upgrade (APOLO-2.0) by Westinghouse. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Instant hot water on demand.
✓Smart Wi-Fi voice control features.
✓Compact design saves valuable space.
💎 Best Value
Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, 28.8kW, On Demand Hot Water, Eco, White, Made in Germany

The best value for most shoppers is Stiebel Eltron Tankless Water Heater – Tempra 29 Plus – Electric, 28.8kW, On Demand Hot Water, Eco, White, Made in Germany by Stiebel Eltron, with consistently high satisfaction across expert and customer reviews.

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

The strongest deal right now for Electric Tankless Water Heater is EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology at EcoSmart, currently at 17% off.

🔄Our Electric Tankless Water Heater ranking is updated regularly to reflect new releases and price changes—check back for the latest picks and deals.