Top 7 Best Generator Interlock Kit For Dual Fuel Generators
The best generator interlock kits for dual fuel generators include options like the Natupal SD200A Interlock Kit for Square D panels, and the SPZOCE Eaton Cutler Hammer and EXCELFU Eaton Cutler Hammer Kit for Eaton/Cutler Hammer systems, selected for their ease of installation, durability, and safe power transfer.
These kits are essential for homeowners looking to safely connect their portable generators to their home’s electrical panel, providing a crucial backup power solution during outages. Ensuring you have the right interlock kit guarantees that only one power source can feed the panel at a time, preventing dangerous backfeed and protecting both your appliances and utility workers.
We’ve narrowed down the choices to seven top-performing kits after a thorough review, evaluating each based on compatibility, material quality, and user feedback. Each selection offers a reliable way to integrate your dual fuel generator into your home’s power system. Continue reading for a detailed comparison of these top generator interlock kits to find the perfect fit for your needs.
3 Standout Picks: Square D panels and Eaton/Cutler Hammer
Start with these 3 standouts. Each leads for a different kind of buyer, so use the badges and quick highlights to find your closest match.
Natupal SD200A Interlock Kit
- Compatible with Square D
- 200 amp panels
- Easy installation
SPZOCE Eaton Cutler Hammer
- Eaton/Cutler Hammer BR/CH
- 150/200 Amp
- Anodized aluminum
EXCELFU Eaton Cutler Hammer Kit
- For Eaton/Cutler Hammer BR
- 150/200 amp panels
- Safe backfeeding
7 Models Side by Side: Features, Best Use Cases, and Tradeoffs
The recommendations above are our strongest matches for different priorities. Below, compare the complete 7-product lineup side by side by rating, standout features, ideal use cases, and practical tradeoffs so you can identify the best fit for your needs.

- Compatible with Square D
- 200 amp panels
- Easy installation

- Eaton/Cutler Hammer BR/CH
- 150/200 Amp
- Anodized aluminum

- For Eaton/Cutler Hammer BR
- 150/200 amp panels
- Safe backfeeding

- For Siemens/Murray panels
- 150/200 amp
- 7/8-1 1/4″ spacing

- Eaton Cutler Hammer 100/125A
- Adjacent breakers
- Corrosion-resistant

- For Eaton/Cutler Hammer BR
- 100/125 amp panels
- Adjacent breakers

- For Eaton/Cutler-Hammer BR
- 100 amp panel
- Aluminum-Alloy build
7 Models Reviewed in Depth
#1. Natupal SD200A Interlock Kit

Panel Compatible
High Capacity
Installation
You’ll appreciate the robust construction and straightforward installation of the Natupal SD200A Interlock Kit, designed specifically for Square D QO or Homeline 150/200 amp panels. Its professional design ensures a safe connection between your generator and home electrical system, preventing dangerous backfeeding. The kit includes all necessary hardware and clear instructions, making it a reliable choice for ensuring power continuity during outages.
While this kit is excellent for its intended panel types, ensure you verify the 1 3/8 inch spacing requirement before purchasing. It’s a solid option if you have compatible Square D panels and need a dependable way to integrate your generator, offering peace of mind and essential functionality.
Pros
- Excellent for Square D panels
- High customer rating
- Complete installation kit
Cons
- Specific panel compatibility
- Requires precise spacing
- Not universal fit
Specifications
#2. SPZOCE Eaton Cutler Hammer

Hammer BR/CH
Aluminum
Panel Ready
You’ll appreciate the premium feel and robust construction of the SPZOCE Generator Interlock Kit, designed for Eaton/Cutler Hammer BR and CH series 150 & 200 amp panels. Made from anodized aluminum alloy with polished edges, it offers durability and a clean look. The kit ensures safe power transfer by preventing simultaneous use of main and generator breakers, and includes a helpful drill bit for installation.
This kit is a standout choice for compatible Eaton/Cutler Hammer panels, offering superior build quality and a precise fit. Ensure your panel has plug-in neutrals and the correct breaker spacing (1 1/4 – 1 7/16 inches) for optimal performance. It’s a great investment for reliable backup power.
Pros
- High-quality aluminum alloy
- Compatible with BR/CH series
- Precise breaker spacing
Cons
- Specific panel compatibility
- Requires drilling
- Higher price point implied
Specifications
#3. EXCELFU Eaton Cutler Hammer Kit

Hammer BR Series
Backfeeding
Panel Ready
You’ll find the EXCELFU Generator Interlock Kit to be a reliable and cost-effective solution for Eaton/Cutler Hammer BR series 150 & 200 amp panels. It effectively prevents simultaneous operation of main and generator breakers, ensuring safe power transfer during outages. The kit includes all necessary components for a straightforward installation, providing peace of mind for your home’s backup power needs.
This kit is specifically designed for Eaton/Cutler Hammer BR series panels with plug-in neutrals, so double-check your panel’s compatibility. If your panel matches, expect a secure and safe setup that keeps your essential appliances running without risk of electrical hazards.
Pros
- Perfect for Eaton/Cutler Hammer
- High safety rating
- Includes all parts
Cons
- Specific panel compatibility
- Requires careful measurement
- Not for other brands
Specifications
#4. XMK Siemens Murray Kit

Panel Compatible
Breaker Spacing
Power Integration
You’ll find the XMK Generator Interlock Kit to be a well-designed and reliable option for Siemens and Murray 150 or 200 amp panels. It ensures safe power transfer by preventing the main and generator breakers from being on simultaneously, offering crucial protection for your home and appliances during power outages. The kit includes all necessary components and is noted for its smooth operation and ease of installation.
Crucially, verify the 7/8 to 1 1/4 inch spacing between your main and branch breakers before ordering. This kit is specific to Siemens/Murray panels and this particular spacing requirement. If your setup matches, it’s an excellent, safe, and user-friendly solution for backup power.
Pros
- Perfect for Siemens/Murray
- Specific spacing noted
- Safe and reliable operation
Cons
- Requires precise spacing
- Panel brand specific
- Not for other brands
Specifications
#5. Joinfworld Eaton Cutler Hammer

Hammer 100/125A
Resistant
Power Transfer
You’ll find the Joinfworld Generator Interlock Kit to be a reliable and durable option for Eaton Cutler Hammer 100A and 125A panels, especially those with adjacent main and generator breakers. Its corrosion-resistant aluminum construction ensures longevity, while the design effectively prevents simultaneous utility and generator power, safeguarding your appliances. The kit includes a specialized drill bit for easier installation.
This kit is a good choice for specific Eaton/Cutler Hammer panels and requires adjacent breakers. While it comes with two interlock plates, ensure you only need one for your setup. It provides a secure and dependable way to manage backup power, offering peace of mind during electrical disruptions.
Pros
- Durable aluminum construction
- Prevents simultaneous power
- Includes specialized drill bit
Cons
- Panel and breaker specific
- Requires drilling
- Two plates included
Specifications
#6. XMK Eaton Cutler Hammer 100/125A

Hammer 100/125A
Breaker Fit
Power Transfer
If you have a 100 or 125 amp Eaton/Cutler Hammer BR series panel, the XMK Generator Interlock Kit offers a straightforward and safe solution for power outages. It’s designed to work with adjacent main and branch breakers, ensuring you can’t accidentally turn on both your main power and generator simultaneously. The kit comes with all the necessary hardware for installation, making it a convenient choice for essential backup power.
This kit is specifically for smaller amperage Eaton/Cutler Hammer panels and requires adjacent breakers. If your panel configuration or amperage differs, you’ll need to look elsewhere. For those with compatible panels, it provides a reliable and affordable way to safely connect your generator.
Pros
- Ideal for 100/125A Eaton panels
- Safe breaker interlock
- Includes drill bit
Cons
- Limited amperage range
- Requires adjacent breakers
- Panel specific
Specifications
#7. MOTOQUEEN Eaton Cutler Hammer

Hammer 100A
Alloy Build
Generator Use
You’ll find the MOTOQUEEN Generator Interlock Kit to be a solid choice if you have a 100 amp Eaton/Cutler-Hammer BR series panel. It’s designed to securely interlock your main and generator breakers, preventing simultaneous operation and ensuring electrical safety during power outages. The kit is made from durable Aluminum-Alloy and is noted for its quick installation, allowing you to get backup power up and running efficiently.
This kit is specifically tailored for 100 amp Eaton/Cutler-Hammer BR series panels. Ensure your panel configuration matches the description, particularly the breaker placement. It offers a good balance of safety and ease of use for users with compatible setups, providing essential protection.
Pros
- Specific to 100A Eaton panels
- Durable Aluminum-Alloy
- Quick bolt-on installation
Cons
- Limited to 100A
- Panel specific fit
- May require hold-down straps
Specifications

Powering Up Smart: Your Dual-Fuel Generator Interlock Kit Guide
When the grid goes dark, the peace of mind a generator provides is invaluable. But for dual-fuel models, ensuring safe and efficient power transfer from your generator to your home’s electrical panel requires the right interlock kit. This isn’t just another accessory; it’s a critical safety device that allows you to seamlessly switch between utility power and generator power without overloading circuits or creating dangerous backfeed. Choosing the correct kit is paramount for protecting your appliances, your home’s wiring, and most importantly, yourself and utility workers.
Decoding the Essentials for Your Generator’s Brain
Before you click “add to cart,” consider these key elements that will determine your interlock kit’s performance and compatibility.
- Generator Model Compatibility: Not all interlock kits are universal. Ensure the kit is specifically designed or listed as compatible with your exact dual-fuel generator model. This is the most crucial step to avoid fitment issues.
- Panel Type and Size: Your home’s electrical panel has specific dimensions and breaker configurations. The interlock kit must be designed to mount securely onto your panel and accommodate the appropriate breaker size for your generator.
- Material and Durability: Look for kits constructed from robust materials that can withstand environmental factors and regular use. A well-built kit will offer long-term reliability.
- Safety Certifications: Reputable interlock kits often carry certifications from recognized safety organizations. These indicate the product has met stringent safety and performance standards.
Common Stumbles on the Path to Secure Power
Navigating the world of generator accessories can have its tricky spots. Be aware of these common oversights.
- Forgetting to verify the kit’s compatibility with both your generator and your home’s specific electrical panel.
- Assuming a “universal” kit will fit all scenarios without checking the detailed specifications.
- Overlooking the importance of proper installation, which often requires a qualified electrician.
Your Dual Fuel Generator’s Powerhouse Connection
For Square D panels, the SD200A is your go-to for robust 150/200 amp compatibility. If you’re rocking an Eaton Cutler Hammer BR Series panel, the Joinfworld kit is ideal for 100/125 amp setups with adjacent breakers, while other Eaton Cutler Hammer kits cover the broader 150/200 amp range and specific 100 amp needs. For Siemens Murray panels, their dedicated interlock kit ensures a seamless fit.
All these options provide essential safety for your dual fuel generator setup. Don’t delay in securing your peace of mind – click the buttons above to check current availability and make your selection!
Final 3 Picks: Square D panels and Eaton/Cutler Hammer
Ready to decide? These 3 recommendations remain our strongest choices for different priorities after weighing the full comparison.
Natupal SD200A Interlock Kit
- Compatible with Square D
- 200 amp panels
- Easy installation
SPZOCE Eaton Cutler Hammer
- Eaton/Cutler Hammer BR/CH
- 150/200 Amp
- Anodized aluminum
EXCELFU Eaton Cutler Hammer Kit
- For Eaton/Cutler Hammer BR
- 150/200 amp panels
- Safe backfeeding
