Best Lightweight Water Heaters in 2025

Daisy
Last Updated: Nov 5, 2025

At a Glance: Our Top Picks for Lightweight Water Heaters

Camplux ME40 Mini Tank Electric Water Heater 4-Gallon with Cord Plug,120 Volts
#TOP1
Camplux Me40 Mini Tank Electric Water Heater 4-Gallon
9.6
PM SCORE
Camplux ME25 Mini Tank Electric Water Heater 2.5-Gallon with Cord Plug,1.5kW at 120 Volts
#TOP2
Camplux Me25 Mini Tank Electric Water Heater 2.5-Gallon
9.6
PM SCORE
Camplux ME60 Mini Tank Electric Water Heater 6-Gallon with Cord Plug,1.44kW at 120 Volts
#TOP3
Camplux Me60 Mini Tank Electric Water Heater 6-Gallon
9.6
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Lightweight Water Heaters of 2025

Camplux Me40 Mini Tank Electric Water Heater 4-Gallon With Cord Plug,120 Volts

CAMPLUX ENJOY OUTDOOR LIFE
B0789CC1TN
11.75 X 10.38 X 19.25 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Camplux 9.67

Features

Saving Energy & Money- Built in insulation foam, reduces heat loss. 4-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.

High Quality Built & Elegant Design- Camplux electric water heater has glass-lined tank for long service life and easy to maintain. Elegant streamline design cover, made your kitchen more pretty.

UL Approval Safety - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating.

43.3‘’ cord plugs into 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI, CSA listed Temperature & Pressure relief valve included)

Can be shelf, wall or floor mounted; Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Product dimension:11.75" W x 22" H x 10.38" D.

Camplux Me25 Mini Tank Electric Water Heater 2.5-Gallon With Cord Plug,1.5Kw At 120 Volts

CAMPLUX ENJOY OUTDOOR LIFE
B0789DTY5L
11.75 X 10.38 X 14.50 Inches
14.40 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Camplux 9.68

Features

Saving Energy & Money - Built in insulation foam, reduces heat loss. 2.5-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.

High Quality Built & Elegant Design- Camplux electric water heater has glass-lined tank for long service life and easy to maintain. Elegant streamline design cover, made your kitchen more pretty.

UL Approval Safety - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating.

43.3‘’ cord plugs into 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI, CSA listed Temperature & Pressure relief valve included)

Can be shelf, wall or floor mounted ; Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Product dimension:11.75" W x 17.25" H x 10.38" D.

Camplux Me60 Mini Tank Electric Water Heater 6-Gallon With Cord Plug,1.44Kw At 120 Volts

CAMPLUX ENJOY OUTDOOR LIFE
ME60
15.75 X 15.50 X 18.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Camplux 9.68

Features

Saving Energy & Money- Built in insulation foam, reduces heat loss. 6-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.

High Quality Built & Elegant Design- Camplux electric water heater has glass-lined tank for long service life and easy to maintain. Elegant streamline design cover, made your kitchen more pretty.

UL Approval Safety - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating.

43.3‘’ cord plugs into 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI, CSA listed Temperature & Pressure relief valve included)

Can be shelf, wall or floor mounted (bracket included); Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Product dimension:15.75" W x 21" H x 15.5" D.

Camplux Electric Water Heater 1.3 Gallon, Hot Water Heater With 43.3'' Cord Plug

CAMPLUX ENJOY OUTDOOR LIFE
ME10
11.00 X 10.00 X 12.50 Inches
12.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Camplux 9.68

Features

Saving Energy & Money- Under sink water heater built-in insulation foam, reduce heat loss

High-Quality - Small water heater has a glass-lined tank, anti-scaling, has a long service life, and is easy to maintain

Safety - UL certification, high-temperature power-off protection (Max. water pressure is 150 PSI, T& P relief valve included)

43.3‘’ cord plugs into a 120-volt outlet for independent installation or in-line with a large hot water source

Easy Installation - Simply tap into the cold water line and install the mini water heater directly at the sink to provide hot water. Product dimension: 11W x 12.5H x 10D inches

Camplux Pro Me25B Mini Tank Electric Water Heater On-Demand Water Heater 2.5 Gallon With Cord Plug 1.44Kw At 120 Volts

CAMPLUX
ME25B
13.00 X 11.50 X 13.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Camplux 9.66

Features

EASY TO USE-43.3'' cord plugs into 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI,CSA listed Temperature & Pressure relief valve included)

MULTIPURPOSE - Can be shelf, wall or floor mounted; Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Product dimension:12.9" W x 12.9" H x 11.5" D.

SWEET PROTECTION - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating.

HIGH QUALITY & LONG LAST-Electric water heater is easy to maintain and has glass-lined tank for long service life.

CONVENIENT HOT WATER - 2.5 gallon Pro mini-tank fits under your sink to provide hot water right where you need it.

Ista I-H615 300W Inline External Heater

ISTA
I-H615
3.50 X 5.80 X 10.90 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Power: 300W

2 temperature sensors, two sensors to exam the temperatures of water (Inlet and outlet)

Thermal spraying glass, faster heating process

External design, easy to install and does not occupy space in the Tank

Displayed in Celsius

2023 Upgrade Digital Submersible Aquarium Heaters 300W/500W, Fish Tank Heater With External Digital Led Temperature Controller And Double Quartz Explosion-Proof Tubes, For Fresh And Salt Water

TEPU
10.83 X 3.03 X 1.30 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
TE.PU 5.95

Features

Digital LED Temperature Controller: Digital aquarium heater precise temperature control, Accuracy:±1°F, Real-time monitoring of water temperature ,the adjustable temperature range of the fish tank heaters is 59℉-93℉, the unique rotary switch design, the operation of setting the temperature is more simple and convenient, Aquarium Heaters digital LED thermostat placed outside the fish tank, when adjusting the temperature, no Don't worry about getting your hands wet from the water in the fish tank

Safety and Explosion-Proof: 300W the adjustable Aquarium Heater is made of quartz glass, and the heating part is made of High temperature resistant alloy heating wire material, which is explosion-proof and durable. The inside of the inline aquarium heaters is sealed with integrated silicone to prevent electric leakage

Anti-Boiling Fish System: When the water temperature reaches the set temperature, Submersible aquarium heaters the power will be automatically cut off. Intelligent induction design, when the fish tank water heater is exposed to the air out of water, it will display an E1 fault code, give a warning, and automatically cut off the power. When the water temperature exceeds 95°F, the E2 fault code is displayed and the power is forced to shut off

High-Efficiency and Energy-Saving Design: The aquarium water heater adopts a high-efficiency double-tube heating structure, fast heating, water heater for fish tank multi-stage frequency conversion design, intelligent power adjustment, the closer the water temperature is to the set temperature, the lower the power, frequency conversion heating, power saving and energy saving

After-Sales Service: Welcome to choose our fish bowl heater to create a beautiful aquarium environment and enhance the experience of fish farming and watching fish. We attach great importance to product safety and quality issues and customer experience. If you have any questions, wholeheartedly solve them for you

Mini Tank Water Heater Electric Ul Listed, Tecnolove 2.5 Gallon Mt25 Point Of Use Under Sink Water Heater, 120V Corded Wall Or Floor Mounted

TECNOLOVE
MT25
11.42 X 11.42 X 15.35 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
thermoflow 6.59

Features

IMMEDIATE HOT WATER - 2.5 Gallon point of use water heater to supply instant hot water on demand at your sink. 24 hours standby, foam insulation and fast reheating, eliminate the long time wait and wasting water

EASY TO INSTALL - 1/2" NPT connector, corded plug into 120V outlet, simply tap into the water line and install the heater directly at the sink. Temparature & Pressure relief valve included, shelf, wall or floor mounted

COMPACT DESIGN - Small tank water heater (11.4"W X11.4"D X22.4"H including valve), space saving design ideal for under sink placement in kitchen, bathrooms and other areas, even fitting in a cabinet

IN-LINE OR INDEPENDENT - Serves as single point water heater or in-line as a booster to a larger hot water heater, knob to adjust temp between 68℉-140℉

ENAMEL COATING GLASS LINED - Gold porcelain linning for better insulation and preventing leaking, CSA T&P Relief valve CASH USA made, UL certified ensuring a safe long service life

3-year Limited Warranty for the tank, 1-year warranty for parts and 24hours customer service

Eemax Spex2412T Lavadvantage Thermostatic Electric Tankless Water Heater

EEMAX
SPEX2412T
12.00 X 5.00 X 3.00 Inches
3.50 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Buildcom 9.74

Features

Hot or cold water feed, microprocessor temperature control for accurate temperature, fitted with 1/2 inch Copper pipe Compression fittings with rear or bottom electric entry,

Kitchen sink, bar sink in-line booster, eliminates long waits for hot water by producing hot water immediately then gradually reducing its power input as the hot water from the tank arrives

Ideal for hand set Showers, pool house, spare bedroom & vacation homes, in-line booster for existing tank heater, back up system for solar heating, 99% efficient

Eemax Spex55T Lavadvantage Thermostatic Electric Tankless Water Heater

EEMAX
SPEX55T
12.00 X 5.00 X 3.00 Inches
3.50 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SIM Supply, Inc. 9.81

Features

Hot or cold water feed, microprocessor temperature control for accurate temperature, fitted with 1/2 inch Copper pipe Compression fittings with rear or bottom electric entry,

Kitchen sink, bar sink in-line booster, eliminates long waits for hot water by producing hot water immediately then gradually reducing its power input as the hot water from the tank arrives

Ideal for hand set Showers, pool house, spare bedroom & vacation homes, in-line booster for existing tank heater, back up system for solar heating, 99% efficient

Eemax Spex8208T Lavadvantage Thermostatic Electric Tankless Water Heater

EEMAX
SPEX8208T
12.00 X 5.00 X 3.00 Inches
3.50 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Buildcom 9.74

Features

Hot or cold water feed, microprocessor temperature control for accurate temperature, fitted with 1/2 inch Copper pipe Compression fittings with rear or bottom electric entry,

Kitchen sink, bar sink in-line booster, eliminates long waits for hot water by producing hot water immediately then gradually reducing its power input as the hot water from the tank arrives

Ideal for hand set Showers, pool house, spare bedroom & vacation homes, in-line booster for existing tank heater, back up system for solar heating, 99% efficient

Camplux Hot Water Heater 4 Gallons 120V Me40B + Me40

CAMPLUX ENJOY OUTDOOR LIFE
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Camplux 9.68

Features

EASY TO USE-43.3'' cord plugs into 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI,CSA listed Temperature & Pressure relief valve included)

MULTIPURPOSE - Can be shelf, wall or floor mounted; Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Product dimension:14.5" W x 14.5" H x 12.9" D

SWEET PROTECTION - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating

HIGH QUALITY & LONG LAST-Electric water heater is easy to maintain and has glass-lined tank for long service life

CONVENIENT HOT WATER - 4-gallon Pro mini-tank fits under your sink to provide hot water right where you need it

Top 10 water heaters Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Camplux Enjoy Outdoor Life 5
Eemax 3
Camplux 1
Ista 1
Tecnolove 1
Tepu 1

Top 10 water heaters Brands Pie Chart


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