February 21, 2026

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10 Best inlet boxes of 2026

Save up to 22% off

1

Reliance Controls
Reliance Controls PB50 50-Amp (CS6375) NEMA 3R Power Inlet Box,Gray
Main highlights

Key Features
Outdoor, raintight NEMA 3R power inlet box, 12,500 watts max, 50A input, for 8 AWG wire. Ensures safe, efficient generator connection.

Ideal Use Cases
Perfect for indoor/outdoor transfer switches, generator-ready load centers, and manual panels in homes needing emergency or backup power solutions.

Customer Praise
Most reviews highlight its durability and ease of installation, appreciating its reliability in various weather conditions.
Key specs
- Size:2.63 x 4 x 6 inches
- Amp Rating:50A
- Wattage:12,500 watts
- Material:Non-metallic
- Voltage:125/250VAC
9.8

Exceptional

Our Rating

9.9
Waterproof

9.5
Durability

9.3
worth the money
How do we rank?

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Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
2

SURAIELEC
SURAIELEC 50 Amp Generator Power Inlet Box, NEMA SS2-50P Generator Box for 3-Prong Generator Cord, 120/240V, 12000W Weatherproof Outdoor Outlet Receptacle
Main highlights

Weatherproof and Durable Design
The SURAIELEC 50 Amp Generator Power Inlet Box features a 3R rainproof enclosure, providing reliable outdoor performance and protection against dust and humidity.

Ideal for Backup Power
Designed for outdoor installation, this inlet box is perfect for providing backup power during outages and severe weather conditions.

Easy Installation Praised
Customers appreciate the easy-to-remove knockouts and detachable front panel, making installation straightforward and hassle-free.
Key specs
- Size:15.47 x 8.31 x 5.67 inches
- Amp Rating:50 amp
- Wattage:12,000W
- Material:Galvanized steel
- Voltage:N/A
9.7

Exceptional

Our Rating
3

RVMATE

Pre-Drilling 50 Amp Generator Inlet Box RVMATE, NEMA SS2-50P Power Inlet Box, 125/250V, 6250/12500W 50a Power Inlet Box, ETL Listed, Waterproof for Outdoor Use
9.4

Excellent

Our Rating

9.7
Durability

9.5
worth the money

9.5
Easy installation
4

GeepKeyPro

30 Amp Generator Inlet Box [Pre-Drilled] with Green Safely Light, PB30 Power Inlet Box, 7500 Watts Generator Transfer Switch Accessories for Emergency in Snowstorm Weather, ETL Listed
9.3

Excellent

Our Rating

9.3
Durability

8.9
Waterproof

8.0
Easy installation
5

RVMATE

Pre-Drilling 30 Amp Generator Inlet Box RVMATE, NEMA L14-30P Power Inlet Box for 4 Prong Generator Cord, 125/250V,3750/7500W 30a Power Inlet Box, ETL Listed, Waterproof for Outdoor Use
9.2

Excellent

Our Rating

9.7
worth the money

9.7
Easy installation

9.7
Durability
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6

Reliance Controls
Reliance Controls Generators Up to 7,500 Running Watts PB30 30-Amp NEMA 3R Power Inlet Box, Gray

22% Off
Main highlights

Key Features
Durable, rust-resistant, and weatherproof; perfect for long-lasting outdoor and indoor use.

Ideal Use Cases
Ideal for patio furniture, garden tools, and automotive parts requiring high durability and corrosion resistance.

Customer Reviews
Most praised for its exceptional durability and ability to maintain appearance despite harsh weather.
9.1

Excellent

Our Rating

9.9
Waterproof

9.7
Easy installation

9.5
worth the money
7

OPL5

OPL5 Pre-Drilling 50Amp Generator Power Inlet Box, NEMA SS2-50P,125/250 Volt, 6250/12500W 50a Power Inlet Box for Emergency in Rainstorm Snowstorm Weather Outdoor Use,ETL Listed (SS2-50P)
8.9

Very Good

Our Rating
8

WELLUCK
WELLUCK 30 Amp Generator Inlet Box - NEMA L14-30P Power Inlet Box for 3R 4-Prong Generator Cord, 125/250V, 7500W Weatherproof Outdoor 30a Power Inlet Box - ETL Listed, Best Partner in Emergencies
Main highlights

Key Features
ETL Listed, supports 30 Amp NEMA L14-30P, 125/250V, 7500W, increased wiring space, enhanced heat dissipation, and weatherproof antirust metal body.

Ideal Use Cases
Perfect for continuous backup power during severe weather conditions like tornadoes and blizzards, ensuring reliability and safety.

Customer Praise
Most reviews highlight its easy installation, durability, and excellent weather resistance as the product`s standout features.
Key specs
- Size:41L x 3.1W x 6.1H
- Amp Rating:30 Amps
- Wattage:7500 watts
- Material:Metal
- Voltage:250 Volts
8.6

Very Good

Our Rating

9.9
Simple to take off

9.5
Durability

9.5
Waterproof
9

PAULINN

PAULINN 30A Generator Power Inlet Box NEMA 3R Generator Outlet Box for Outdoor Receptacle, 4 Prone, PB30, L14-30P, 125/250 Volt, 7500W 30 Amp Generator Transfer Switch, Weatherproof, ETL Listed

22% Off
8.4

Good

Our Rating

9.9
Durability

9.7
Waterproof

9.1
Easy installation
10

PAULINN

PAULINN 30A Generator Power Inlet Box NEMA 3R Generator Outlet Box for Outdoor Receptacle, 4 Prone, PB30, L14-30P, 125/250 Volt, 7500W 30 Amp Generator Transfer Switch, Weatherproof, ETL Listed

11% Off
8.2

Good

Our Rating

9.9
Durability

9.7
Waterproof

9.1
Easy installation

10 Best inlet boxes of 2026

1

Reliance Controls PB50 50-Amp (CS6375) NEMA 3R Power Inlet Box,Gray

9.9

9.5

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

SURAIELEC 50 Amp Generator Power Inlet Box, NEMA SS2-50P Generator Box for 3-Prong Generator Cord, 120/240V, 12000W Weatherproof Outdoor Outlet Receptacle

3

Pre-Drilling 50 Amp Generator Inlet Box RVMATE, NEMA SS2-50P Power Inlet Box, 125/250V, 6250/12500W 50a Power Inlet Box, ETL Listed, Waterproof for Outdoor Use

9.7

9.5

9.5

4

30 Amp Generator Inlet Box [Pre-Drilled] with Green Safely Light, PB30 Power Inlet Box, 7500 Watts Generator Transfer Switch Accessories for Emergency in Snowstorm Weather, ETL Listed

9.3

8.9

8.0

5

Pre-Drilling 30 Amp Generator Inlet Box RVMATE, NEMA L14-30P Power Inlet Box for 4 Prong Generator Cord, 125/250V,3750/7500W 30a Power Inlet Box, ETL Listed, Waterproof for Outdoor Use

9.7

9.7

9.7

6

Reliance Controls Generators Up to 7,500 Running Watts PB30 30-Amp NEMA 3R Power Inlet Box, Gray

9.9

9.7

9.5

7

OPL5 Pre-Drilling 50Amp Generator Power Inlet Box, NEMA SS2-50P,125/250 Volt, 6250/12500W 50a Power Inlet Box for Emergency in Rainstorm Snowstorm Weather Outdoor Use,ETL Listed (SS2-50P)

8

WELLUCK 30 Amp Generator Inlet Box - NEMA L14-30P Power Inlet Box for 3R 4-Prong Generator Cord, 125/250V, 7500W Weatherproof Outdoor 30a Power Inlet Box - ETL Listed, Best Partner in Emergencies

9.9

9.5

9.5

9

PAULINN 30A Generator Power Inlet Box NEMA 3R Generator Outlet Box for Outdoor Receptacle, 4 Prone, PB30, L14-30P, 125/250 Volt, 7500W 30 Amp Generator Transfer Switch, Weatherproof, ETL Listed

9.9

9.7

9.1

10

PAULINN 30A Generator Power Inlet Box NEMA 3R Generator Outlet Box for Outdoor Receptacle, 4 Prone, PB30, L14-30P, 125/250 Volt, 7500W 30 Amp Generator Transfer Switch, Weatherproof, ETL Listed

9.9

9.7

9.1

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