Best Portable Generator Interlocks: Top Safe Backup Picks

Are you looking for the best portable generator interlocks?
Our curated selection highlights top interlock kits, ensuring safe power backup for your home.

Portable generator interlocks are essential tools for safe power backup during outages. They connect your generator to your home’s electrical panel without risks. These kits prevent accidents and keep your appliances safe.

Choosing the right interlock kit ensures reliable power when you need it most. They are easy to install and work with many panel types. From Square D to Eaton Cutler Hammer, there’s a kit for your setup.

We’ve tested and reviewed the best portable generator interlocks for you. Find the perfect match for your home and stay powered up safely.

List of Top 10 Portable Generator Interlocks

Title	Best For	Price
Natupal Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp panels. 1 3/8 inches Spacing between main and generator breaker, Professional and Interlock Kit (SD200A)	This Natupal Generator Interlock Kit is perfect for homeowners who want a safe and easy way to connect a generator during power outages. It’s ideal for those with Square D QO or Homeline 150/200 amp panels and 1 3/8 inches of space between breakers.	View on Amazon (paid link)
Generator Interlock Kit Compatible with Eaton Cutler Hammer BR SERIES 150 and 200 amp Panels, Generator Horizontal Electrical Interlock Kit, 1 1/4-1 7/16 inches Spacing Between Main and Branch Breaker	This Generator Interlock Kit is perfect for homeowners who want a safe and reliable way to power their homes during outages. It’s easy to install and works with Eaton Cutler Hammer BR Series 150 and 200 amp panels.	View on Amazon (paid link)
LiftCharger 50 Amp Generator to House Hook-up Kit for Square D Homeline 150/200/225 Amp Load Center, Including Generator Cord,Power Inlet Box,Panel Interlock Kit and Circuit Breaker	This LiftCharger 50 Amp Generator Hook-up Kit is perfect for homeowners who want a reliable and safe way to power their homes during outages. It’s ideal for those with Square D Homeline load centers and portable generators rated 9000-15000 Watts.	View on Amazon (paid link)
Generator Interlock Kit for Square D QO or Homeline 100 or 125 Amp Panels, 3/4 to 7/8 Inches Spacing, Professional and Interlock Kit for Square D Homeline and QO 100 A Indoo or Outdoor	This kit is perfect for homeowners needing safe backup power during outages. It’s compatible with Square D QO or Homeline panels and easy to install for reliable generator use.	View on Amazon (paid link)
Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp Panels.1 3/8 inches Spacing Between Main and Generator Breaker.Professional and Interlock Kit(1set)	This Generator Interlock Kit is perfect for homeowners who want to safely connect a portable generator to their Square D QO or Homeline 150/200 amp panels. It’s easy to install and prevents dangerous power mix-ups during outages.	View on Amazon (paid link)
QYZZRS Generator Interlock Kit Compatible with Square D Homeline Meter Main 150 or 200 amp Breaker,for Safe Usage of Portable Power During Outage,Professional and Interlock Kit	This Generator Interlock Kit is perfect for homeowners who want a safe and reliable way to use a portable generator during power outages. It’s easy to install and works with Square D Homeline 150 or 200 amp breakers, keeping your home and devices protected.	View on Amazon (paid link)
QYZZRS Generator Interlock Kit Compatible with Eaton Cutler Hammer 100 Amp and 125 Amp Panels Breaker,for Safe Usage of Portable Power During Outage,Professional and Interlock Kit (1)	This Generator Interlock Kit is perfect for homeowners who want a safe and reliable way to use their portable generator during power outages. It’s easy to install and works with Eaton Cutler Hammer 100 Amp and 125 Amp panels, keeping your home and devices protected.	View on Amazon (paid link)
Natupal Generator Interlock Kit Compatible with Square D QO HOM 150 or 200 amp panels. 1 3/8 Inch Spacing between main and branch breaker, update versioner, Professional and Interlock Kit, new version	This Natupal Generator Interlock Kit is perfect for homeowners who want a safe and easy way to connect a generator during power outages. It’s ideal for those with Square D QO or Homeline 150/200 amp panels and 1 3/8 inch spacing between breakers.	View on Amazon (paid link)
Generator Interlock Kit for Eaton Cutler Hammer Type CH Series 150 or 200 amp Panels TAN Breaker ONLY,Horizontal Main Generator Interlock Kit,1 1/2 Inch Spacing Between Main and Branch Breaker	This Generator Interlock Kit is perfect for homeowners with Eaton Cutler Hammer CH Series 150 or 200 amp panels who want a safe and reliable way to connect a portable generator during power outages. It’s easy to install and ensures safety for your family.	View on Amazon (paid link)
Generator Interlock Kit for Siemens 100 Amp or Murray 100 Amp Panels, Professional and Interlock Kit, 7/8-1 1/4″ Spacing Between Main and Branch Breakers	This kit is perfect for homeowners who have Siemens or Murray 100‑Amp panels and need home power safety. It keeps your family safe during power outages.	View on Amazon (paid link)

Detailed Reviews

Find the best portable generator interlocks with our trusted guide.
We list each model’s main features and cost.
Explore the choices that keep your home safe.

1. Natupal Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp panels. 1 3/8 inches Spacing between main and generator breaker, Professional and Interlock Kit (SD200A)

Natupal Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp panels. 1 3/8 inches Spacing between main and generator breaker, Professional and Interlock Kit (SD200A)

The Natupal Generator Interlock Kit works with Square D QO or Homeline 150/200 amp panels. It needs 1 3/8 inches of space between breakers. This kit keeps your home safe during power outages.

It includes all parts for easy installation, like screws, labels, and a drill bit. No extra wiring or boxes are needed. Stay powered up with this simple, reliable solution.

Pros	Cons
Safe power during outages with easy generator connection. Fits Square D QO or Homeline 150/200 amp panels perfectly. Complete kit with all parts for quick installation. No extra wiring or control box needed. Lifetime replacement guarantee for peace of mind.	May not fit panels outside listed models Needs drilling, which some users may not like Metal plate can feel a bit stiff to adjust

Perfect For:

This Natupal Generator Interlock Kit is perfect for homeowners who want a safe and easy way to connect a generator during power outages. It’s ideal for those with Square D QO or Homeline 150/200 amp panels and 1 3/8 inches of space between breakers.

Ready to Purchase?

View Price on Amazon (paid link)

2. Generator Interlock Kit Compatible with Eaton Cutler Hammer BR SERIES 150 and 200 amp Panels, Generator Horizontal Electrical Interlock Kit, 1 1/4-1 7/16 inches Spacing Between Main and Branch Breaker

Generator Interlock Kit Compatible with Eaton Cutler Hammer BR SERIES 150 and 200 amp Panels, Generator Horizontal Electrical Interlock Kit, 1 1/4-1 7/16 inches Spacing Between Main and Branch Breaker

The generator interlock kit gives your home a safe way to use backup power. It keeps your system steady and protects your appliances during outages.

It fits Eaton Cutler Hammer BR Series panels and works with 150 and 200 amp models. The setup is simple and keeps the main breaker and generator breaker from turning on together.

It installs fast. It works smoothly. It keeps your power safe.

Pros	Cons
Safe backup power for your home Fits Eaton Cutler Hammer BR panels Stops both breakers from being on Quick and simple to install Complete kit with all parts included	Not universal: Only works with specific Eaton/Cutler Hammer panels. Drilling required: Needs permanent modifications to your electrical panel. No generator included: Kit doesn’t come with a generator.

Perfect For:

This Generator Interlock Kit is perfect for homeowners who want a safe and reliable way to power their homes during outages. It’s easy to install and works with Eaton Cutler Hammer BR Series 150 and 200 amp panels.

Ready to Purchase?

View Price on Amazon (paid link)

3. LiftCharger 50 Amp Generator to House Hook-up Kit for Square D Homeline 150/200/225 Amp Load Center, Including Generator Cord,Power Inlet Box,Panel Interlock Kit and Circuit Breaker

LiftCharger 50 Amp Generator to House Hook-up Kit for Square D Homeline 150/200/225 Amp Load Center, Including Generator Cord,Power Inlet Box,Panel Interlock Kit and Circuit Breaker

The LiftCharger 50 Amp Generator Hook-up Kit makes it easy and safe to connect your generator to your home. It’s designed for Square D Homeline load centers and works with 50-amp generators. This kit lets you power any circuit in your home during outages.

It fits 9000-15000-watt generators and includes code-compliant parts for safety. The kit prevents backfeeding and protects utility workers. It’s a reliable solution for emergency power.

Installation is straightforward with clear instructions. You’ll need an electrician and a permit in most states. The kit includes heavy-duty parts like a pure copper generator cord and a Square D 50-amp breaker for peace of mind.

Pros	Cons
Safely power your home with easy generator hook-up. Fits Square D panels, no expensive transfer switch needed. Code-compliant parts protect you and utility workers. Heavy-duty materials ensure reliable, long-lasting performance.	Requires electrician for setup, adding extra cost and time. Permit needed in most states, complicating installation process. Not plug-and-play, demands technical knowledge for safe use.

Perfect For:

This LiftCharger 50 Amp Generator Hook-up Kit is perfect for homeowners who want a reliable and safe way to power their homes during outages. It’s ideal for those with Square D Homeline load centers and portable generators rated 9000-15000 Watts.

Ready to Purchase?

View Price on Amazon (paid link)

4. Generator Interlock Kit for Square D QO or Homeline 100 or 125 Amp Panels, 3/4 to 7/8 Inches Spacing, Professional and Interlock Kit for Square D Homeline and QO 100 A Indoo or Outdoor

Generator Interlock Kit for Square D QO or Homeline 100 or 125 Amp Panels, 3/4 to 7/8 Inches Spacing, Professional and Interlock Kit for Square D Homeline and QO 100 A Indoo or Outdoor

The Generator Interlock Kit is compatible with Square D QO or Homeline 100/125 Amp panels. It ensures safe and reliable power backup during outages.

This kit includes all necessary parts for easy installation. It prevents main and generator breakers from being on at the same time. The smooth operation keeps your family safe.

Ideal for emergency power needs, it’s cost-effective and dependable. The complete kit comes with labels, screws, and instructions for hassle-free setup.

Pros	Cons
Safe and reliable backup power for your home. Easy to install with complete kit included. Compatible with Square D QO and Homeline panels. Cost-effective solution for emergency power.	Not for all panels, check compatibility first. Requires drilling, basic tools needed. No generator included, kit only.

Perfect For:

This kit is perfect for homeowners needing safe backup power during outages. It’s compatible with Square D QO or Homeline panels and easy to install for reliable generator use.

Ready to Purchase?

View Price on Amazon (paid link)

5. Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp Panels.1 3/8 inches Spacing Between Main and Generator Breaker.Professional and Interlock Kit(1set)

Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp Panels.1 3/8 inches Spacing Between Main and Generator Breaker.Professional and Interlock Kit(1set)

This kit fits Square D QO panels. It needs a 1 3/8‑inch gap.

It stops power from the grid and generator. Use the screws and drill bit.

It is safe.
It is easy.
It protects your power.

Pros	Cons
Safe power transfer during outages, protecting your home and devices. Fits Square D QO and Homeline 150/200 amp panels perfectly. Easy installation with included tools and clear instructions. Prevents dangerous dual power supply, keeping electricians safe.	Needs skill to install right May not fit all panel setups Small parts can be easy to lose

Perfect For:

This Generator Interlock Kit is perfect for homeowners who want to safely connect a portable generator to their Square D QO or Homeline 150/200 amp panels. It’s easy to install and prevents dangerous power mix-ups during outages.

Ready to Purchase?

View Price on Amazon (paid link)

6. QYZZRS Generator Interlock Kit Compatible with Square D Homeline Meter Main 150 or 200 amp Breaker,for Safe Usage of Portable Power During Outage,Professional and Interlock Kit

QYZZRS Generator Interlock Kit Compatible with Square D Homeline Meter Main 150 or 200 amp Breaker,for Safe Usage of Portable Power During Outage,Professional and Interlock Kit

The QYZZRS Generator Interlock Kit is compatible with Square D Homeline Meter Main 150 or 200 amp Breakers. It ensures safe use of portable power during outages. This kit is professional and reliable.

Before installing, attach screws to the interlock kit first. Test the alignment to avoid installation errors. This step ensures smooth and correct usage.

The package includes all necessary tools and labels. It comes with detailed installation instructions. This kit keeps your home and devices safe during power outages.

Pros	Cons
Safe power during outages with easy installation. Prevents electrical dangers and device damage. Complete kit includes all tools and labels. Compatible with Square D Homeline 150/200 amp breakers.	Installation can be tricky, requiring careful alignment to avoid errors. No tools included, except for a single drill bit. Manual transfer needed; not an automatic switch system.

Perfect For:

This Generator Interlock Kit is perfect for homeowners who want a safe and reliable way to use a portable generator during power outages. It’s easy to install and works with Square D Homeline 150 or 200 amp breakers, keeping your home and devices protected.

Ready to Purchase?

View Price on Amazon (paid link)

7. QYZZRS Generator Interlock Kit Compatible with Eaton Cutler Hammer 100 Amp and 125 Amp Panels Breaker,for Safe Usage of Portable Power During Outage,Professional and Interlock Kit (1)

QYZZRS Generator Interlock Kit Compatible with Eaton Cutler Hammer 100 Amp and 125 Amp Panels Breaker,for Safe Usage of Portable Power During Outage,Professional and Interlock Kit (1)

The QYZZRS Generator Interlock Kit is compatible with Eaton Cutler Hammer 100 Amp and 125 Amp panels. It ensures safe power usage during outages. This kit is easy to install and reliable.

Before installing, attach screws to the interlock kit first. Test the alignment to avoid installation errors. This step ensures the kit works perfectly every time.

The package includes all necessary tools and labels. It comes with detailed instructions for safe and correct use. This kit keeps your home and devices protected.

Pros	Cons
Safe power during outages with easy installation. Compatible with Eaton Cutler Hammer 100/125 Amp panels. Prevents dangerous dual power supply issues. Complete kit includes tools, labels, and instructions.	Not for all panels, only Eaton Cutler Hammer 100/125 Amp. Requires drilling, no pre-drilled holes for easy install. No professional help, DIY skills needed.

Perfect For:

This Generator Interlock Kit is perfect for homeowners who want a safe and reliable way to use their portable generator during power outages. It’s easy to install and works with Eaton Cutler Hammer 100 Amp and 125 Amp panels, keeping your home and devices protected.

Ready to Purchase?

View Price on Amazon (paid link)

8. Natupal Generator Interlock Kit Compatible with Square D QO HOM 150 or 200 amp panels. 1 3/8 Inch Spacing between main and branch breaker, update versioner, Professional and Interlock Kit, new version

Natupal Generator Interlock Kit Compatible with Square D QO HOM 150 or 200 amp panels. 1 3/8 Inch Spacing between main and branch breaker, update versioner, Professional and Interlock Kit, new version

The Natupal Generator Interlock Kit works with Square D QO or Homeline 150/200 amp panels. It needs 1 3/8 Inch spacing between breakers. This kit keeps your home safe during power outages.

It includes all parts for easy installation, like screws, labels, and a drill bit. No extra wiring or control box is needed. Stay powered up safely with this kit.

Pros	Cons
Safely connect your generator to your home’s electrical system. Easy installation with no extra wiring or control box needed. Compatible with Square D QO or Homeline 150/200 amp panels. Includes all necessary hardware and clear instructions for setup. Reliable solution to avoid power outage inconveniences.	Not universal: Only works with specific Square D panels. Drilling required: Must drill into panel for installation. No wiring included: Extra parts may be needed for setup.

Perfect For:

Ready to Purchase?

View Price on Amazon (paid link)

9. Generator Interlock Kit for Eaton Cutler Hammer Type CH Series 150 or 200 amp Panels TAN Breaker ONLY,Horizontal Main Generator Interlock Kit,1 1/2 Inch Spacing Between Main and Branch Breaker

Generator Interlock Kit for Eaton Cutler Hammer Type CH Series 150 or 200 amp Panels TAN Breaker ONLY,Horizontal Main Generator Interlock Kit,1 1/2 Inch Spacing Between Main and Branch Breaker

This generator interlock kit is designed for Eaton Cutler Hammer CH series panels. It works with 150 or 200 amp models that have TAN breakers. The kit ensures safe power backup during outages.

It includes all necessary parts for easy installation. The interlocking plate and drill bit make setup simple. It keeps your home powered safely and reliably.

Pros	Cons
Safe and reliable backup power for your home. Easy installation with complete kit included. Compatible with Eaton Cutler Hammer CH panels. Prevents main and generator breakers from being on together.	Not for CH panels with PON breakers or flat/raised main areas. Requires drilling, may void panel warranty if installed incorrectly. Limited compatibility, only works with TAN breakers in CH series.

Perfect For:

This Generator Interlock Kit is perfect for homeowners with Eaton Cutler Hammer CH Series 150 or 200 amp panels who want a safe and reliable way to connect a portable generator during power outages. It’s easy to install and ensures safety for your family.

Ready to Purchase?

View Price on Amazon (paid link)

10. Generator Interlock Kit for Siemens 100 Amp or Murray 100 Amp Panels, Professional and Interlock Kit, 7/8-1 1/4″ Spacing Between Main and Branch Breakers

This generator interlock kit keeps your home safe when the power goes out. It fits Siemens and Murray 100 Amp panels with ease.

It works with 7/8″ or 1 1/4″ spacing. It blocks both power sources at once. It keeps your home systems safe.

It installs fast and moves smooth. It comes with a full set of parts. It gives you clear labels for simple use.

Pros	Cons
Safer power transfer with built-in generator interlock for Siemens and Murray panels. Prevents dangerous dual power sources during outages with automatic shut-off. Simple setup with included tools and clear instruction labels. Perfect spacing for Plug on Neutral or NON Plug on Neutral panel types. Complete kit includes all parts for quick, professional-level installation.	May not fit all panel layouts Needs exact spacing check before install Not ideal for first-time DIY users

Pros

Cons

Safer power transfer with built-in generator interlock for Siemens and Murray panels.
Prevents dangerous dual power sources during outages with automatic shut-off.
Simple setup with included tools and clear instruction labels.
Perfect spacing for Plug on Neutral or NON Plug on Neutral panel types.
Complete kit includes all parts for quick, professional-level installation.

May not fit all panel layouts
Needs exact spacing check before install
Not ideal for first-time DIY users

Perfect For:

This kit is perfect for homeowners who have Siemens or Murray 100‑Amp panels and need home power safety.
It keeps your family safe during power outages.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Portable generator interlocks keep your home safe during power outages. They connect your generator to your electrical panel without risks.

Choosing the right interlock kit ensures reliable power when you need it most. Here’s what to consider:

Panel Compatibility:
Make sure the kit works with your electrical panel brand and model. Check for Square D, Eaton Cutler Hammer, Siemens, or Murray compatibility.
Amp Rating:
Match the kit’s amp rating to your panel. Common options are 100, 125, 150, or 200 amps.
Breaker Spacing:
Measure the space between your main and generator breakers. Kits fit spacings like 3/4 inch, 1 3/8 inch, or 1 1/2 inch.
Ease of Installation:
Look for kits with clear instructions, all necessary parts, and no extra wiring. Some include drill bits and labels for convenience.
Safety Features:
Choose kits that prevent backfeeding and protect utility workers. They should keep your appliances and home safe.
Durability:
Opt for kits with heavy-duty materials like pure copper cords and sturdy plates for long-lasting use.
Professional Help:
Some kits require an electrician and a permit. Check local rules before installing.

With these factors in mind, you’ll find the perfect portable generator interlock for your home. Stay powered up safely!