Electric tankless water heaters are growing in popularity due to their compact design, energy efficiency, and ability to provide endless hot water on demand. Unlike traditional tank water heaters that store hot water, electric tankless models heat water only when it’s needed, helping homeowners reduce energy waste and lower utility bills. If you’re in the market for an electric tankless water heater, it’s important to choose a model that delivers reliable performance, energy savings, and the right flow rate for your household.
In this guide, we’ll explore the best-rated electric tankless water heaters of 2025, highlighting top models based on performance, energy efficiency, and customer satisfaction. Whether you need a water heater for a small apartment or a larger home, our picks will help you make an informed decision.
Why Choose an Electric Tankless Water Heater?
Electric tankless water heaters offer several benefits that make them a great choice for homeowners:
- Endless Hot Water: Electric tankless water heaters provide hot water on demand, meaning you never run out of hot water, no matter how much you use.
- Energy Efficiency: Since these units heat water only when needed, they eliminate the standby heat loss that traditional tank models experience, leading to lower energy consumption.
- Compact Design: Tankless units are much smaller than traditional tank water heaters, making them ideal for homes with limited space or for installation in smaller locations like under sinks or in closets.
- Longer Lifespan: Electric tankless water heaters typically last longer than traditional tank models, thanks to their design and fewer components that are prone to wear and tear.
Top 5 Best Rated Electric Tankless Water Heaters of 2025
Here are the top-rated electric tankless water heaters that offer excellent performance, energy savings, and reliability in 2025:
1. EcoSmart ECO 27 Electric Tankless Water Heater
The EcoSmart ECO 27 is one of the most popular and highly-rated electric tankless water heaters on the market. It’s perfect for homes with 3 or more bathrooms, providing consistent hot water for large households or multiple simultaneous water usage.
- Capacity: Ideal for up to 3-4 bathrooms
- Energy Efficiency: 99.8% energy efficiency with self-modulating technology
- Flow Rate: 6.5 GPM at a 45°F rise
- Warranty: 5-year limited warranty
This model is highly efficient and saves space with its compact design. It’s an excellent option for those who need hot water for multiple appliances or bathrooms at the same time. The self-modulating technology ensures that the unit adjusts energy use based on water flow, optimizing energy savings.
2. Rinnai RL75iN Electric Tankless Water Heater
The Rinnai RL75iN is a high-performance electric tankless water heater that delivers reliable and energy-efficient hot water on demand. It’s designed to meet the needs of large homes with higher water usage, including multiple bathrooms and appliances running simultaneously.
- Capacity: Ideal for homes with 2-3 bathrooms
- Energy Efficiency: High energy factor (EF) for maximum energy savings
- Flow Rate: 7.5 GPM at a 35°F rise
- Warranty: 12-year limited warranty on the heat exchanger
With its compact and space-saving design, the Rinnai RL75iN provides an efficient and consistent hot water supply for larger homes. It is highly rated for its reliability and energy-efficient operation, making it a top choice for homeowners looking for a long-lasting solution.
3. Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater
The Stiebel Eltron Tempra 24 Plus is a high-performance electric tankless water heater that offers a perfect balance of efficiency and hot water output. It’s ideal for homes with moderate hot water demand, offering excellent flow rates and consistent performance.
- Capacity: Suitable for homes with 1-2 bathrooms
- Energy Efficiency: High energy factor (EF) for reduced energy consumption
- Flow Rate: 4.0 GPM at a 35°F rise
- Warranty: 7-year limited warranty
This unit’s advanced temperature control technology ensures that you get a steady supply of hot water with consistent temperatures, even during simultaneous use. Its compact design and energy-saving capabilities make it an ideal choice for homeowners looking to save space and reduce energy costs.
4. Bosch Tronic 3000 4-Gallon Electric Mini-Tank Water Heater
The Bosch Tronic 3000 is a mini-tank water heater that is perfect for point-of-use applications, such as under a sink or in a small apartment. While it’s not designed for whole-house use, it provides an excellent solution for smaller homes or specific hot water needs.
- Capacity: 4 gallons
- Energy Efficiency: Insulated tank for heat retention and energy savings
- Installation: Can be installed under sinks or in tight spaces
- Warranty: 6-year limited warranty
The Bosch Tronic 3000 is a reliable and energy-efficient mini-tank option, perfect for supplying hot water to a single faucet or small appliance. Its compact design and easy installation make it a great addition to homes with limited space.
5. Titan SCR2 N-120 Electric Tankless Water Heater
The Titan SCR2 N-120 is a highly efficient electric tankless water heater designed for homes with moderate hot water demand. With its durable construction and energy-efficient operation, it’s a solid choice for homeowners seeking reliable, on-demand hot water.
- Capacity: Ideal for 1-2 bathrooms
- Energy Efficiency: High energy factor for reduced energy consumption
- Flow Rate: 3.0 GPM at a 35°F rise
- Warranty: 5-year limited warranty
This model is known for its quick installation and consistent hot water delivery. It’s perfect for smaller homes, apartments, or point-of-use applications, offering high efficiency without taking up space.
How to Choose the Best Electric Tankless Water Heater
When selecting the best electric tankless water heater, there are a few key factors to consider to ensure it meets your home’s specific needs:
1. Flow Rate and Capacity
The flow rate (measured in gallons per minute or GPM) indicates how much hot water the unit can provide at a time. Larger homes or households with multiple bathrooms will require a higher flow rate to ensure adequate hot water supply for simultaneous use.
2. Energy Efficiency
Electric tankless water heaters are known for their energy efficiency, but it’s important to choose a model with a high energy factor (EF) or Energy Star certification. These units use less energy and help reduce your overall utility costs.
3. Warranty and Reliability
Look for models that come with a solid warranty, as this indicates the manufacturer’s confidence in the product’s durability and reliability. Most electric tankless water heaters come with a 5-7 year warranty on parts and longer warranties on the heat exchanger.
4. Installation and Space Requirements
Electric tankless models are compact and designed to save space, but it’s still important to ensure the unit will fit in your desired installation area. Some models are more compact than others, making them easier to install in smaller spaces.
Conclusion
Electric tankless water heaters are an excellent choice for homeowners who want efficient, space-saving solutions for their hot water needs. The top models we’ve reviewed above offer a balance of performance, energy efficiency, and value, making them some of the best options available in 2025.
Ready to upgrade your water heater? Consider one of the top-rated electric tankless water heaters we’ve highlighted to enjoy consistent hot water, lower energy bills, and long-term savings.