Best Electric Tankless Water Heater 2025

Meet new technologies that save your time, money, and space. Electric tankless water heaters are the most efficient and compact heaters, compared to old models with tanks. They last even longer than gas water heaters and will satisfy your needs as long as you want. This solution is a great investment that brings a lot of benefits in the long run.

This market grows every day and dozens of new models are designed every year, that’s why it’s complicated to choose the most suitable one among all of them. If you don’t want to browse through hundreds of water heaters, here are the top 15 models just for you.

FAQ

TOP 15 Best Electric Tankless Water Heaters

#1 Stiebel Eltron Tankless Water Heater

If you consider this model affordable, you may stop right now and go buy it. The reason is it’s really a great heater but for a quite high price. This water heater is small, compact, and easy to use, thanks to the convenient digital display and pre-set temperature buttons. One of the most significant advantages is patented German technology — Advanced Flow Control. This feature automatically maintains water temperature. Plus, other characteristics are great too: 0.99 energy factor, 24kW wattage, temperature range from 86˚ to 140˚F, and 4.50 max GPM, 150 PSI water pressure. This device operates silently, which is also nice. Requires 240V.

#2 Ecosmart ECO 18 Electric Tankless Water Heater

The next model is a kind of compromise between characteristics and a price if the previous one seems expensive to you. Ecosmart water heater offers up to 4.3 gallons per minute with 18kW wattage, the same water pressure, and almost the same 80˚ to 140˚F temperature range. There are no unique features or something outstanding, but it’s a very confident and durable model that will satisfy your needs for a reasonable price. In addition to this, you get a lifetime warranty for electronics, element, and exchanger. Requires 240V.

#3 EcoSmart ECO 11 Electric Tankless Water Heater

Okay, if you need something cheaper but yet rather efficient, there is a model just for you. This compact water heater with 13KW wattage delivers from 1.3 to 3.1 gallons of water per minute at a 150 PSI pressure and has an incredible energy factor of 0.98. The temperature range is the same, a lifetime warranty is also provided. Besides, this model uses self-modulation technology, which increases the efficiency of the device. Requires 240V.

#4 Rheem RTEX-18 18kW 240V Electric Tankless Water Heater

Rheem is one of the market leaders in the niche of water heaters for sure. Despite a quite high price, this beautifully designed steel model has great value for money. First of all, it’s compact, which makes it easy to install and use. The accurate digital display also helps a lot. What comes to parameters, this 18kW heater provides up to 4.4 gallons per minute and has a great self-modulation. 240V is required.

#5 ECOTOUCH Electric Tankless Water Heater

If you like high-tech designs, you will like this model for sure. It’s a compact, minimalistic, heater with a touchpad for a pretty affordable price. This model has a 9kW wattage and delivers 1.5 gallons per minute. In addition to this, the device is protected from overheating, dry-heating, leakage, and electricity issues. Compared to the previous competitors, this model a lower water pressure of 87 PSI maximum. Requires 240V to operate.

#6 Rinkmo Electric Tankless Water Heater

One more powerful model designed by Rinkmo with a little high initial cost but with great efficiency. This heater is easy to use, thanks to the intuitive design and it provides the following characteristics: 18kW wattage, 150 PSI water pressure, up to 4.5 GPM, and over 167° F the outlet temp. It easily supports multiple fixtures, so all your needs will be satisfied with a breeze. The unit requires 240V to operate.

#7 ECOTOUCH Self-Modulating Tankless Water Heater Electric

Ecotouch always has interesting designs combined with useful features and affordability. This inexpensive but rather powerful 9kW device heats up to 1.5 gallons of water per minute at a maximum pressure of 87 PSI. The temperature range is from 77 to 131 degrees Fahrenheit. The heater suits perfectly the average residential heating needs. Moreover, it’s made of durable materials, so you can feel safe. Requires 240V.

#8 Camplux Electric Tankless Water Heater

If you are looking for something powerful for a reasonable price, this model is one of the best choices. TE27 offers up to 6.6 gallons of water per minute, 145 max water pressure, 27kW wattage, from 86°F to 125°F temperature range, and great protection. Besides, this model supports 180-degree installation and has a user-friendly interface, which facilitates the use. The heater suits large houses and requires 240V to operate.

#9 Sio Green SIO18 Infrared Electric Tankless Water Heater

This model is one of the most expensive ones we have for today. The reason is that it uses infrared technology to heat water, which means it’s heating only water without collateral damage to elements, such as corrosion. It increases the lifetime of the device. Plus, customers get free maintenance. Despite all of this, it’s a compact and powerful 18kW heater that delivers up to 4 gallons per minute. It also requires 240V.

#10 Camplux ME25 Mini Tank Electric Water Heater

Back to the low-budget solutions, we recommend you to take a look at this model. Camplux values characteristics more than design, which is great for those who want the best value for money. This small heater with a simple installation requires 120V and provides up to 2.5 gallons of water per minute. The maximum water pressure is 150 PSI and the temperature range is from 50 to 140°F. It’s complicated to find a device like this because it has decent parameters for a low price.

#11 Atmor AT-910-27TP ThermoPro Electric Tankless Water Heater

If you like the idea of powerful water heaters for a decent price, this one may suit you well. This durable stainless steel 27kW water heater delivers a maximum of 5.1 gallons per minute, has a 90 to 135 degrees Fahrenheit temperature range, and requires 3 40amp single-phase DP breakers 240V to operate. Using such an electrical heater can save a lot of money by providing hot water only when you need it. Advanced self-modulating decreases the amount of energy required to heat up water, which is also helpful.

#12 BISELONG 1.5Kw Mini-Tanks Water Heater Electric

For those who need a small water heater for the kitchen, bar, laundry, bathroom, or garage, there is an awesome model by Biselong. This compact easy-to-use device requires 120V and provides up to 2.5 gallons of water per minute at a 115 PSI pressure. The maximum temperature is 167-degree F. Depending on the region, it takes only 8 to 15 minutes to get the desired temperature. The heater not very powerful but yet efficient, and its wattage is 1.5kW.

#13 Eccotemp EM-2.5 Electric 2.5-Gallon Mini Tank Water Heater

You can also take a look at this one if you haven’t found the previous model on the market. It also provides up to 2.5 gallons per minute and requires 120V to operate. However, some parameters differ. For example, the maximum water pressure is higher and it’s 150 PSI, the wattage is a bit lower and it’s 1.4kW, and the temperature range is only from 50 to 140 degrees Fahrenheit. The minimal recovery time is 20 minutes. Although such water heaters are not too powerful, they are extremely convenient to use and save a great sum.

#14 Stiebel Eltron Tempra Plus Tankless Electric Water Heater

Before we get to the end, let’s review one more pricey model that is not that popular as cheap heaters. This electric heater doesn’t have an outstanding design but it offers decent features. The 28.8kW wattage, 6 gallons per minute, 86°F to 140°F temperature range, advanced flow control, silent operation, great protection, and extremely durable materials — characteristics of the Tempra 29 Plus. Comparing to gas heaters, such powerful devices are much easier to install. However, they are still profitable.

#15 Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater

And the last model is also for people who can’t afford something as expensive as the previous model or just don’t need such powerful devices. It’s the most compact heater on the market that delivers 0.5 gallons of water per minute. It requires 120V and a minimum100 amp electrical panel to operate and its wattage is 3.5kW. This device can heat water to 105 degrees Fahrenheit.

Conclusion

Let us summarize what we have reviewed. These 15 models are the best models you can find on the market. To be more specific, we want to point out a few models from cheap and expensive ones.

Best cheap models:

• #4 Rheem RTEX-18 18kW 240V Electric Tankless Water Heater;
• #12 BISELONG 1.5Kw Mini-Tanks Water Heater Electric.

Best expensive models:

• #1 Stiebel Eltron Tankless Water Heater;
• #6 Rinkmo Electric Tankless Water Heater;
• #14 Stiebel Eltron Tempra Plus Tankless Electric Water Heater.