Best Electric Water Heaters in the USA

Electric storage water heaters are particularly attractive for homes that already have adequate electrical service, do not have natural-gas or propane infrastructure, or want a relatively straightforward replacement. They are also available in many configurations, including tall, short, lowboy, manufactured-housing and grid-capable models.

This guide focuses specifically on conventional electric storage water heaters. Heat pump water heaters are treated separately because their primary heating mechanism is fundamentally different. For that technology, see Best Heat Pump Water Heaters.

If you want to compare electric water heaters with heat pumps, gas tankless, gas storage and solar systems, see our Best Water Heaters in the USA guide.

Quick Answer: Best Electric Water Heaters in the USA

Our overall choice: The Rheem Performance Platinum Gladiator XE55T12CG55U0 is an excellent all-around conventional electric water heater because it combines a 55-gallon tank, 0.92 UEF, 12-year tank and parts warranty, 3-year full in-home labor warranty, leak detection, automatic leak shutoff and Wi-Fi connectivity. Rheem also lists a 55–72 gallon first-hour rating across the 50- and 55-gallon Gladiator models.

For smart features: The A. O. Smith Signature 500 EEA12-50H55DVF provides connected controls, leak monitoring, automatic shutoff capability, 5,500-watt stainless-steel elements and a 12-year tank and parts warranty.

For long-term tank durability: The Rheem Marathon is unusual because its tank uses a seamless non-metallic polybutene construction rather than the conventional steel tank architecture. Rheem provides a lifetime limited tank warranty for residential applications, subject to its warranty requirements.

What Is a Conventional Electric Water Heater?

A conventional electric water heater is a storage tank containing one or more electric resistance heating elements.

Cold water enters the tank and is heated by the elements. The heated water remains stored until a fixture is opened. When hot water leaves the tank, cold water enters to replace it and the thermostat activates the heating elements as necessary.

The basic energy conversion is simple:

Electrical energy → resistance heating → thermal energy in water

This simplicity is one of the biggest advantages of the technology.

There is no burner, combustion chamber, gas valve, exhaust flue or combustion-air system. The main engineering considerations are instead tank capacity, element wattage, recovery rate, insulation, electrical supply, water pressure, temperature control and corrosion protection.

How an Electric Storage Water Heater Works

1. Cold water enters the tank: Incoming water is directed toward the lower portion of the tank.
2. Heating elements transfer heat: Electrical current passes through resistance elements immersed in the water.
3. Thermostats monitor temperature: Controls determine when heating is required.
4. Hot water rises: Heated water naturally moves toward the upper portion of the tank.
5. Hot water exits: Opening a fixture causes hot water to leave through the outlet.
6. Cold water replaces it: Incoming cold water enters the tank.
7. Heating resumes: The elements restore the tank temperature.

Most residential electric storage heaters use two elements, one near the top and one near the bottom. They generally do not operate simultaneously on a standard residential configuration. The upper element has priority when the tank needs substantial reheating, after which the lower element restores the remainder of the tank.

Why Electric Water Heaters Are Simple

Compared with gas-fired systems, conventional electric storage heaters eliminate several mechanical systems.

This makes conventional electric storage water heaters particularly attractive when simplicity and easy replacement are more important than achieving the lowest possible operating energy consumption.

Electric Resistance Heating Efficiency

Electric resistance heating is very efficient at converting electricity into heat at the point of use. However, that does not mean a conventional electric water heater is as energy-efficient as a heat pump water heater.

The distinction is important.

A resistance element converts essentially all of the electrical energy supplied to it into heat. A heat pump, however, can move substantially more thermal energy into the water than the electrical energy consumed by its compressor and other components.

Therefore:

• Resistance heating: simple and highly effective at converting electricity into heat.
• Heat pump heating: uses electricity to move heat from another source and can deliver much more heat per unit of electricity.

This is why a conventional electric storage water heater should not be confused with a heat pump water heater simply because both use electricity.

Understanding UEF

Uniform Energy Factor (UEF) is the primary efficiency metric used to compare modern residential water heaters.

For conventional electric storage water heaters, UEF accounts for the energy required to provide hot water under standardized testing conditions.

A higher UEF generally indicates better efficiency, but the difference between two models should be interpreted alongside:

• Tank capacity
• First-hour rating
• Recovery rate
• Element wattage
• Standby heat loss
• Household demand
• Electricity price

A small increase in UEF does not necessarily justify buying a significantly larger or more expensive tank.

Tank Capacity vs First Hour Rating

Tank capacity is the amount of water stored in the tank. First Hour Rating (FHR) is a measure of how much hot water the heater can supply during a high-demand first-hour test.

These are not the same thing.

For example, a 50-gallon tank does not necessarily deliver exactly 50 gallons of usable hot water before the temperature becomes inadequate. As hot water is drawn, incoming cold water enters the tank while the heating elements continue recovering the water.

A model with a relatively high FHR can therefore outperform another heater with the same nominal tank capacity.

How to Size an Electric Water Heater

Step 1: Determine Household Size

A rough starting point is:

These numbers are starting points rather than universal rules.

Step 2: Determine Peak-Hour Demand

Consider the busiest period of the day.

• Showers
• Bathtub use
• Dishwasher
• Clothes washer
• Kitchen faucet
• Bathroom faucets

For example, a family of four that takes consecutive showers may require a different tank than a family of four whose showers are spread throughout the day.

Step 3: Compare FHR

Compare the expected peak-hour demand with the manufacturer’s FHR.

Step 4: Check Recovery Rate

Electric resistance recovery depends heavily on element wattage and temperature rise.

A 4,500-watt element supplies more heating power than a 3,800-watt element, while a 5,500-watt element can provide still more recovery capacity when the electrical installation supports it.

How Electric Heating Element Wattage Works

Residential electric water heaters commonly use elements around 3,800, 4,500 or 5,500 watts.

Higher wattage means greater heating power.

The approximate recovery relationship is:

Recovery rate ∝ Element wattage ÷ Temperature rise

For example, Rheem lists its Gladiator models with 4,500- and 5,500-watt copper elements and recovery figures of approximately 21–25 gallons per hour at a 90°F rise, depending on model.

However, a higher-wattage element is not automatically better. The electrical circuit must be designed for the load, and local electrical-code requirements must be satisfied.

4500-Watt vs 5500-Watt Elements

For a replacement installation, do not assume that a 5,500-watt model can simply replace a 4,500-watt model without checking the circuit, conductor sizing and installation requirements.

240 Volt Electric Water Heaters

Most full-size residential electric storage water heaters operate on a 240-volt supply.

At 240 volts, a 4,500-watt element draws approximately:

I = P ÷ V

I = 4500 ÷ 240 ≈ 18.75 A

A 5,500-watt element draws approximately:

I = 5500 ÷ 240 ≈ 22.9 A

However, water-heater circuit sizing is not determined simply by dividing wattage by voltage. Electrical codes, continuous-load calculations, conductor ampacity, breaker rating and the specific appliance configuration must be considered.

A licensed electrician should verify the installation.

Can an Electric Water Heater Use 120 Volts?

Some smaller or specialized electric water heaters operate at 120 volts, but full-size conventional residential storage heaters commonly use 240 volts because higher voltage makes high heating power practical without excessive current.

A 4,500-watt heater at 120 volts would theoretically require:

4500 ÷ 120 = 37.5 A

That is why 240-volt service is much more practical for full-size resistance water heaters.

Short vs Tall Electric Water Heaters

Tank capacity is not the only dimension that matters.

A short or lowboy model can be useful when the installation has limited vertical clearance, while a tall model can provide greater capacity without requiring as much floor area.

Bradford White currently offers both upright and lowboy residential electric water heaters, with its lowboy models specifically designed for tight spaces such as crawl spaces and under-counter installations.

Electric Water Heaters for Limited Space

If vertical clearance is the primary problem, do not automatically reduce the tank capacity.

Instead, look for:

• Short models
• Lowboy models
• Side-connection models
• Horizontal-clearance alternatives where available
• Different tank diameters

For example, A. O. Smith currently lists 40-, 50- and 55-gallon tall, short and lowboy electric configurations in its Signature lineup.

See Best Water Heaters for Limited Space.

Electric Water Heaters for Apartments

Electric storage water heaters can be particularly convenient in apartments because they do not require gas service or combustion venting.

However, apartment installations still require adequate electrical capacity, floor loading, drain provisions and access for maintenance.

The tank location should also be evaluated for water-leak consequences.

A leak-detection and automatic-shutoff model can be particularly attractive where the water heater is located above finished living space.

See Best Water Heaters for Apartments.

Electric Water Heaters for Existing Homes

Conventional electric storage heaters are particularly well suited to replacement projects because the new heater can often use the existing water connections and electrical infrastructure.

Nevertheless, replacement should never be treated as simply disconnecting one tank and connecting another.

Check:

• Existing tank capacity
• Tank height
• Tank diameter
• Water-connection location
• Electrical circuit
• Breaker size
• Drain pan
• Temperature-and-pressure relief discharge
• Expansion tank where required
• Floor condition

See Best Water Heaters for Existing Homes.

Electric Water Heaters for New Construction

New construction provides greater flexibility because the electrical circuit, water connections, drain pan and installation location can all be designed around the selected model.

This makes it easier to:

• Install a dedicated electrical circuit
• Provide adequate clearance
• Install a drain pan
• Provide a suitable discharge route for the T&P valve
• Install leak detection
• Plan future heat-pump conversion

See Best Water Heaters for New Construction.

Electric Water Heaters and Solar Panels

A conventional electric storage heater can be used with a photovoltaic solar system because electricity generated by the PV system can offset the electricity consumed by the water heater.

However, a conventional resistance heater is not inherently a solar thermal system.

There are two fundamentally different approaches:

• PV + electric water heater: photovoltaic panels generate electricity, which can power the resistance heater.
• Solar thermal water heater: solar collectors directly heat a fluid or water used for domestic hot-water production.

A heat pump water heater can also be paired with PV and may require substantially less electricity than resistance heating.

See Best Water Heaters With Solar Panels.

Electric Water Heater Maintenance

1. Inspect the Anode Rod

The anode rod provides sacrificial corrosion protection for conventional steel tanks.

Water chemistry determines how quickly it is consumed.

2. Flush Sediment

Sediment can accumulate at the bottom of the tank and reduce effective heating performance.

3. Check the Heating Elements

Mineral deposits can accumulate on elements, particularly in hard-water areas.

4. Inspect the T&P Relief Valve

The temperature-and-pressure relief valve is a critical safety component and should be maintained according to the manufacturer’s instructions.

5. Inspect Connections

Check water connections and the tank area for signs of corrosion or leakage.

6. Check the Drain Pan

Where a drain pan is installed, make sure its drain path remains clear.

7. Check Leak Detection

Smart models can provide an additional layer of protection through leak sensors and automatic shutoff systems.

Hard Water and Electric Water Heaters

Hard water can affect conventional electric storage heaters through mineral accumulation on heating elements and sediment buildup inside the tank.

Possible effects include:

• Reduced heating efficiency
• Increased heating noise
• Reduced effective tank volume
• Shorter element life
• More frequent maintenance

Water treatment should be selected based on actual water chemistry rather than assuming that every hard-water home needs the same treatment system.

See Best Water Heaters for Hard Water.

Tank Construction Matters

Most conventional electric storage water heaters use a steel tank with a glass-based lining and a sacrificial anode.

Rheem’s Marathon takes a different approach.

Its tank uses a seamless blow-molded polybutene construction surrounded by fiberglass reinforcement and insulation. Rheem says the tank is impervious to rust and corrosion and provides a lifetime limited residential tank warranty under its stated conditions.

This makes the Marathon particularly interesting for homeowners who place greater value on long-term tank construction than on smart-home features.

Steel vs Non-Metallic Electric Water Heater Tanks

Leak Detection and Automatic Shutoff

Modern electric water heaters increasingly include electronic leak-detection systems.

This can be particularly valuable because a failed storage tank can release a large amount of water into a home.

Rheem’s Gladiator includes integrated leak detection and prevention, including an automatic water shutoff valve. Rheem states that the system is designed to limit leaks to no more than approximately 20 ounces under its specified operation.

A. O. Smith’s current Signature 500 models similarly offer Leak Watch monitoring and Leak Shield automatic shutoff functionality on applicable configurations.

These features should be considered especially valuable when the water heater is:

• Located upstairs
• Installed above finished rooms
• Located in an apartment
• Installed in a garage near valuable equipment
• Installed in a vacation property

Smart Electric Water Heaters

Wi-Fi connectivity does not make an electric water heater more efficient by itself.

Its value comes from control and monitoring.

Smart systems can provide:

• Remote temperature adjustment
• Vacation scheduling
• Leak notifications
• Diagnostic notifications
• Energy monitoring on selected systems
• Utility demand-response integration

Rheem’s Gladiator includes EcoNet Wi-Fi and a CTA-2045 EcoPort for compatible utility demand-response programs.

A. O. Smith’s Signature 500 models provide iCOMM smart connectivity and CTA-2045 capability on applicable configurations.

Demand Response and Grid-Capable Electric Water Heaters

A storage water heater is essentially a thermal battery.

Electricity can be used to heat water before it is needed, allowing the utility or homeowner to shift some electrical consumption away from peak periods.

CTA-2045-compatible models are designed to communicate with compatible demand-response systems.

This can be particularly interesting in homes with:

• Time-of-use electricity rates
• Solar PV
• Smart-home systems
• Utility demand-response programs
• Battery storage

However, actual savings depend on whether the local utility offers a compatible program and how the system is configured.

Electric Water Heater Safety

Although conventional electric water heaters do not use combustion, they still combine electricity, pressurized water and high temperatures.

Important safety features include:

• Temperature-and-pressure relief valve
• High-temperature cutoff
• Grounding
• Correct circuit protection
• Dry-fire protection on selected models
• Proper water-pressure control
• Correct installation of relief-valve discharge piping

Modern models can also include electronic diagnostics and leak detection.

Never bypass a safety thermostat, relief valve or electrical protection device to obtain more hot water.

Electric Water Heater Installation Requirements

Before installing an electric storage heater, verify:

• Tank dimensions
• Floor loading
• Electrical voltage
• Breaker and circuit requirements
• Conductor sizing
• Water pressure
• Water connection size
• Drain pan requirements
• T&P discharge route
• Expansion-control requirements
• Local plumbing code
• Local electrical code

The exact installation manual should always take precedence over generic sizing rules.

Electric Water Heater vs Heat Pump Water Heater

If electricity consumption is the primary concern and the installation is suitable, a heat pump water heater is usually the more efficient electric technology.

If simplicity, low upfront cost and straightforward replacement are more important, conventional electric storage remains highly practical.

Electric Water Heater vs Gas Storage Water Heater

Best Electric Water Heaters: Our Recommended Models

1. Rheem Performance Platinum Gladiator XE55T12CG55U0 — Best Overall Electric Water Heater

The Rheem Performance Platinum Gladiator XE55T12CG55U0 is our best overall conventional electric water heater because it combines a relatively large 55-gallon tank with strong efficiency, smart controls, leak protection and a long warranty.

Why We Selected It

• 55-gallon nominal tank
• 0.92 UEF
• 12-year tank and parts warranty
• 3-year full in-home labor warranty
• Wi-Fi connectivity
• Integrated leak detection
• Automatic leak shutoff
• CTA-2045 EcoPort demand-response capability
• 4,500/5,500-watt copper heating elements depending configuration
• 55–72 gallon FHR across the 50/55-gallon models
• 21–25 GPH recovery at a 90°F rise depending model
• Self-cleaning sediment-reduction system
• Premium-grade anode rod
• Temperature-and-pressure relief valve included

Rheem currently lists the XE55T12CG55U0 with 55-gallon capacity, 0.92 UEF, Wi-Fi, leak detection and a 12-year tank/parts warranty.

Relevant Certification / Standards

Rheem lists UL and AHRI certifications for the Gladiator product family. Installation must comply with the applicable electrical and plumbing codes.

Important Limitations

• Requires appropriate 240V electrical service.
• Heavier and physically larger than small-capacity models.
• Higher purchase price than basic 6-year electric tanks.
• Smart functions depend on electrical power and network connectivity.
• 55 gallons may still be insufficient for unusually high simultaneous demand.

Who Should Buy It

It is an excellent choice for a typical family replacing a conventional electric storage heater and wanting stronger warranty coverage, leak protection and smart features.

Who Shouldn’t Buy It

It is unnecessary for a very small household with low demand if a smaller and less expensive model fits the installation.

Maintenance Considerations

Inspect the anode rod, flush sediment when appropriate, inspect the T&P valve and monitor the leak-detection system. Hard-water homes may require more frequent maintenance.

Retailer / Product Information

Check Rheem’s current product listing and authorized retailers for availability and regional pricing.

For existing-home replacement, see Best Water Heaters for Existing Homes.

2. A. O. Smith Signature 500 EEA12-50H55DVF — Best Smart Electric Water Heater

The A. O. Smith Signature 500 EEA12-50H55DVF is a strong choice for homeowners who want a conventional resistance heater with a substantial feature set rather than moving to heat-pump technology.

Why We Selected It

• 50-gallon nominal capacity
• 45-gallon rated storage volume
• 0.95 UEF in A. O. Smith’s current product specification
• 12-year tank warranty
• 12-year parts warranty
• 5500-watt maximum heating elements
• 240V operation
• Leak detection
• Self-cleaning design
• Electronic controls
• Smart connectivity
• CTA-2045 grid capability on the EEA configuration
• Dry-fire protection

A. O. Smith’s current product page lists the EEA12-50H55DVF with a 50-gallon nominal capacity, 45-gallon rated storage volume, 0.95 UEF, 12-year tank and parts warranty and 5,500-watt maximum heating capacity.

Some retail listings describe the related EE12/EEA12 configurations with 0.92 UEF, so buyers should verify the exact model suffix and current Energy Guide before comparing efficiency numbers.

Relevant Certification / Standards

The model is designed as a residential electric storage water heater and includes the applicable safety components and code-oriented features specified by the manufacturer.

Important Limitations

• Higher wattage requires appropriate electrical service.
• Smart features add complexity compared with a basic mechanical-control water heater.
• Actual efficiency and operating cost depend on household use and electricity rates.
• Exact specifications should be checked against the model suffix on the nameplate.

Who Should Buy It

It is particularly attractive for homeowners who want a conventional electric tank but also want remote monitoring, leak protection and stronger warranty coverage.

Who Shouldn’t Buy It

It is not the best choice for someone whose only priority is the lowest initial purchase price.

Maintenance Considerations

Inspect the anode, flush sediment, monitor the leak-detection system and inspect the heating elements periodically according to A. O. Smith’s instructions.

Retailer / Product Information

Check A. O. Smith’s current product listing and authorized retailers for exact model availability.

For smart-home-oriented installations, see Best Energy Efficient Water Heaters.

3. Rheem Marathon MR50245 — Best Long-Life Electric Water Heater

The Rheem Marathon MR50245 is fundamentally different from the typical steel electric water heater. Its non-metallic tank construction is the primary reason we selected it.

Why We Selected It

• 50-gallon nominal capacity
• Approximately 0.91 UEF for the MR50245 configuration
• 57-gallon first-hour rating
• 4,500-watt upper/lower elements
• 240V operation
• Seamless blow-molded polybutene tank
• Fiberglass reinforcement
• Polyurethane insulation
• Non-corroding tank architecture
• Lifetime limited residential tank warranty under Rheem’s stated conditions
• 6-year parts warranty

Rheem describes the Marathon as a non-metallic electric water heater with a seamless polybutene tank, multiple layers of filament-wound fiberglass and polyurethane insulation. Its current product page lists a 50-gallon MR50245 model, while current product documentation lists a 57-gallon FHR and approximately 0.91 UEF for the model.

Relevant Certification / Standards

Rheem lists the Marathon family with applicable electric-water-heater certifications including UL and AHRI-related listings.

Important Limitations

• Higher initial cost than many conventional steel tanks.
• Does not provide the same smart-home functionality as premium connected models.
• 50-gallon capacity may be insufficient for very large households.
• Warranty registration and installation requirements must be followed.

Who Should Buy It

This is particularly attractive for homeowners who prioritize tank durability, corrosion resistance and long-term ownership over Wi-Fi connectivity.

Who Shouldn’t Buy It

If you plan to sell the home soon or want extensive smart controls, a less expensive connected steel-tank model may offer better value.

Maintenance Considerations

The non-metallic tank eliminates many of the corrosion concerns associated with conventional steel tanks, but the heating elements, plumbing connections, safety components and sediment should still be maintained.

Retailer / Product Information

Check Rheem’s current Marathon product page and authorized retailers for availability.

For vacation-property applications, see Best Water Heaters for Vacation Homes.

4. Bradford White RE340T6 — Best Professional-Installation Electric Water Heater

The Bradford White RE340T6 is a conventional 40-gallon electric water heater aimed primarily at the professional installation channel.

Why We Selected It

• 40-gallon class
• Dual immersed heating elements
• 4,500-watt elements in the common 240V configuration
• Vitraglas tank lining
• Microban protection on the tank lining
• Hydrojet Total Performance System
• Protective anode rod
• Automatic controls
• 3/4-inch water connections
• Temperature-and-pressure relief valve
• Non-CFC foam insulation

Bradford White currently lists the RE340T6 among its USA residential upright electric water heaters. Its current product platform uses Vitraglas tank lining, Hydrojet sediment control, immersed heating elements and protective anodes.

Relevant Certification / Standards

Bradford White’s current product documentation provides specification sheets, installation instructions, service manuals and warranty information for its USA residential electric models.

Important Limitations

• Primarily distributed through plumbing professionals rather than a simple retail model.
• 40-gallon capacity is smaller than the 50–55 gallon premium models.
• Exact UEF and recovery specifications should be confirmed from the current model-specific specification sheet.
• May not be the easiest choice for homeowners seeking direct online retail purchasing.

Who Should Buy It

It is a good choice when a professional plumber recommends Bradford White and local service and parts availability are strong.

Who Shouldn’t Buy It

It may not be the most convenient option for a homeowner who wants to compare retail prices online and install a consumer-oriented smart model.

Maintenance Considerations

Inspect the anode, flush sediment and maintain the elements and safety components according to Bradford White’s instructions.

Retailer / Product Information

Bradford White directs homeowners toward plumbing professionals and its professional distribution network.

For smaller households, see Best Water Heaters for 2 People.

5. A. O. Smith Signature 500 EEA12-55H55DVF — Best Large-Capacity Smart Electric Water Heater

The 55-gallon Signature 500 is the larger counterpart to the 50-gallon model and is intended for households that want additional stored hot-water capacity while retaining smart controls and leak protection.

Why We Selected It

• 55-gallon nominal capacity
• 5,500-watt heating elements
• 240V operation
• 12-year tank and parts warranty
• Leak detection
• Automatic leak-shutoff capability on applicable configuration
• Smart connectivity
• CTA-2045 demand-response capability on EEA configuration
• Self-cleaning system
• Electronic controls

A. O. Smith currently lists EEA12-55H55DVF as a 55-gallon, 5,500-watt, 12-year electric water heater with leak detection and CTA-2045 capability.

Relevant Certification / Standards

The unit is a residential electric storage water heater with electronic controls and the safety equipment required for its installation. Confirm the exact current Energy Guide and model documentation before purchase.

Important Limitations

• Requires adequate 240V electrical service.
• Large physical size may not fit every replacement location.
• Higher upfront cost than basic 40- or 50-gallon tanks.
• Exact UEF should be verified against the current model-specific Energy Guide.

Who Should Buy It

It is a good choice for families that need more storage than a 40-gallon heater and want smart monitoring and leak protection.

Who Shouldn’t Buy It

Small households with modest demand should consider a smaller tank instead of paying for unused capacity.

Maintenance Considerations

Inspect the anode, flush sediment, maintain the heating elements and verify that leak sensors and automatic shutoff components remain operational.

Retailer / Product Information

Check the current A. O. Smith product listing and authorized retailers for regional availability.

For larger households, see Best Water Heaters for Large Families.