Top 10 Best interlock kit for generator in 2026

Last Updated - 6/13/2026

🏆Best Choice

Natupal

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)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•【Compatible Models】Generator Interlock Kit Compatible with Square D QO or Homeline 150 or 200 amp panels.
•【Interval Space Required】1 3/8 Inch Spacing between main and generator breaker.
•【Safety Generator Interlock kit】This kit avoids the inconveniences that an unexpected power outage can cause. It is used to direct generator power to any circuit within your home safely. It is truly a great way to safely connect up a generator while assuring that you have access to all of your home electrical appliances.
•【Package Contents】Our Generator Interlock kit include 1 × Interlock plate, 3 × Shoulder Screws, 3 × Hex Nuts, 1 × Generator Start-Up Procedure Label, 5 × Remind Label, 2 × Zip Ties, 1 × Instruction Bulletin, 1 × Drill Bit.
•【Easy to Install】The generator interlock kit offers a 3/16 drill bit, sturdy steel that goes through breaker panel easily. Easy to install, no need extra control box or wiring. Simply contact us back if our product ever fails you and we'll mail you a new original replacement.

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$17.99

$26.99

-33%

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EXCELFU

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

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Safe and Reliable: Generator interlock kit for Eaton Cutler Hammer provide a safe and cost-effective way to backfeeding of your home electrical appliances by a portable generator. Ideal solution for power outages or emergency backup power to keep your home geared up and running safely.
•Compatible Models: Generator Interlock Kit Compatible with Eaton/Cutler Hammer Interlock Kit for BR Series, BR series with plug-in neutral and CH-series with plug in neutral 150 and 200 amp
•Main Breaker Position: Single handle horizontal throw left (on) to right (off) 1 1/4 - 1 7/16 inches spacing between main breaker and branch breakers.
•Easy Installation: Easy to connect the generator to electrical panel and ensure the main breaker can never be on while the generator breaker is on.
•What You Get: 1 x Interlock Plate, 3 x Shoulder Screws, 3 x Hex Nuts, 1 x Drill Bit, 1 x Generator Start-Up Procedure Labels, 5 x Remind Label, 2 x Zip Ties, 1 x Instruction and EXCELFU 100% Satisfying Customer Service.

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$15.99

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QYZZRS

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)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Generator interlock kits are available for Square D QO and Homeline 150 and 200 amp panels.
•Interval Space Required：1 3/8 Inch Spacing between main and generator breaker.
•Installation Note: Before installing the interlocking kit, Attach the screws to the interlock kit first. Let's simulate the use of the test, so that we can better align the installation position, to avoid errors in the installation position, resulting in failure to use.
•Safe use：the manual transfer switch device allow portable generator safe back feeding power supply to distribution panel and home line. Prevent utility and generator supplies from being ON at the same time. Aren't putting electrician in dangerous and damage electric devices during power outages.
•Package：Our Generator Interlock kit include 1 × Interlock plate, 3 × Screws kit, 1 × Drill Bit, 1 × Instruction Bulletin, 2 × Generator Start-Up Procedure Label, 8 × Remind Label, 2 × Zip Ties.

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$9.99

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XMK

Generator Interlock Kit Compatible with Siemens or Murray 150 or 200 Amp Panels, 7/8-1 1/4" Spacing Between Main and Branch Breakers

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Compatible Models: Generator interlock kit compatible with Siemens/Murray 150 or 200 amp panels.
•The Spacing between main and branch breaker is 7/8 to 1 1/4 inches. Please make sure the model and spacing are correct.
•Safe and Reliable: Generator Interlock kits for Siemens/Murray prevents both mains and generator power supply at the same time. The interlock kit is used to safely direct generator power to any circuit in your home, while ensuring you can safely use all your household appliances. Ideal solution to keep your home geared up and running safely while power outages.
•Easy Installation: Easy to connect the generator to Murray or Siemens electrical panel. Moves smoothly when in operation and provide safety for you and your family.
•Complete Interlock Kits: 1 x Interlocking Plate, 3 x Shoulder Screws, 3 x Hex Nuts, 1 x Matching Drill Bit, 5 x Remind Labels, 2 x Zip Ties, 1 x Instruction and 100% Satisfying Customer Service.

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$14.99

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EXCELFU

Generator Interlock Kit Compatible with General Electric GE 150 or 200 Amp Panels, Generator Electrical Interlock Kit, 1 1/4 Inch Spacing Between Main and Branch Breaker

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Compatible Models: Generator Interlock Kits fit for General Electric GE 150 or 200 Amp Panels.
•Main Breaker Position: 1 1/4 inches spacing between main breaker and branch breakers.
•Safe and Reliable: Generator interlock kit for GE prevents both mains and generator power supply at the same time. The generator lockout kit is used to safely direct generator power to any circuit in your home, while ensuring you can safely use all your household appliances. Ideal solution to keep your home geared up and running safely while power outages.
•Easy Installation: Easy to connect the generator to GE electrical panel. Moves smoothly when in operation and ensure the main breaker can never be on while the generator breaker is on.
•Complete Generator Breaker Interlock Kit : 1 x Interlocking Plate, 3 x Shoulder Screws, 3 x Hex Nuts, 1 x Drill Bit, 5 x Remind Labels, 2 x Zip Ties, 1 x Instruction and EXCELFU 100% Satisfying Customer Service.

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$14.99

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QYZZRS

Generator Interlock Kit Compatible with Eaton Cutler Hammer BR Series 150 and 200 amp Panels,1 1/4-1 7/16 inches Spacing Between Main and Branch Breaker,Professional and Interlock Kit(1Set)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•This Interlock Kit Compatible with Eaton Cutler Hammer BR and CH Series Main 150 and 200 AMP Panels
•Interval Space Required：1 1/4 - 1 7/16 Inch Spacing between main and generator breaker. Make sure the model numbel and spacing is correct, and they will work.
•Installation Note: Before installing the interlocking kit, Attach the screws to the interlock kit first. Let's simulate the use of the test, so that we can better align the installation position, to avoid errors in the installation position, resulting in failure to use.
•Package：Our Generator Interlock kit include 1 × Interlock plate, 3 × Screws kit, 1 × Drill Bit, 1 × Instruction Bulletin, 2 × Generator Start-Up Procedure Label, 8 × Remind Label, 2 × Zip Ties.
•Safe use：the manual transfer switch device allow portable generator safe back feeding power supply to distribution panel and home line. Prevent utility and generator supplies from being ON at the same time. Aren't putting electrician in dangerous and damage electric devices during power outages.

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$7.99

$9.99

-20%

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XMK

Generator Interlock Kit for Eaton Cutler Hammer 100A and 125A BR Series Panels,Interlock Kit for Eaton Cutler Hammer 100 Amp and 125 Amp for BR Series Panels with Adjacent Main and Branch Breakers

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Compatible Models: Generator interlock kit compatible with Cutler Hammer/Eaton interlock kit for BR Series 100 and 125 amp panels
•Main and Branch Breaker Position: Single handle horizontal throw left to right main breaker and adjacent branch breakers
•Safe and Reliable: Generator interlock kit for Eaton Cutler Hammer 100A and 125A provide a safe and cost-effective way to backfeeding of your home electrical appliances by a portable generator; Ideal solution for power outages or emergency backup power to keep your home geared up and running safely
•Easy Installation: Easy to connect the generator to Eaton/Cutler Hammer electrical panel and ensure the main breaker can never be on while the generator breaker is on; Moves smoothly when in operation and provide safety for your family
•Complete Interlock Kits: 1 x Interlocking Plate, 3 x Shoulder Screws, 3 x Hex Nuts, 1 x Matching Drill Bit, 1 x Generator Start-Up Procedure Labels, 5 x Remind Labels, 2 x Zip Ties, 1 x Instruction

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$15.99

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MuuTuoL

MuuTuoL 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, SD200A Professional and Safe Interlock Kit

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Compatible Models: Generator interlock kit compatible with Square D QO or Homeline 150 or 200 amp panels
•Interval Space Required: 1 3/8 inch spacing between main and generator breaker
•Safe and Reliable: This interlock kit 200 amp prevents unplanned power outages from causing inconvenience,The interlock kit is used to safely connect the generator power to any circuit in your home, preventing the utility power and generator power from coming on at the same time, and ensuring that you can use all of your household appliances while safely connecting the generator
•Easy to Install: Generator interlock kit breaker panel transfer switch is provided with a 3/16 drill bit to easily pass through the circuit breaker panel without the need for an additional control box or wiring, you can test the location in advance before marking and drilling the holes before installation
•Package Contents: Our breaker interlock kit include 1 x interlock plate, 3 x shoulder screws, 3 x hex nuts, 1 x generator startup program label, 5 x reminder labels, 2 x tie wraps, 1 x instructional bulletin, 1 x drill bit

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$7.99

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Flngr

Generator Interlock Kit Compatible with GE General Electeric Vertical Main150 or 200 Amp Panels. 2 1/4" Spacing Between Main and Branch Breakers，Electrical Interlock Kit

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【Compatible models】Generator Interlock Kits Compatible with General Electric vertical 150 or 200 amp panels.The Spacing between main and branch breaker is 2 1/4 inches. Before buying, you need to make sure the model and spacing are correct
•【Application scenarios】 Our kit provides a easy and safe solution when inconvenience caused by unexpected power outages. The interlock kit prevents both mains and generator power supply at the same time, it is used to safely direct generator power to any circuit in your home, while ensuring you can safely use all your household appliances
•【Professional and safe】：We specializes in Generator Interlock Kits. We produce high-quality products to provide safety for you and your family. Electricity safety is no smal
•【Package includes】 1 interlocking panel, 1 matching drill bit, 3 shoulder screws, 3 hex nuts, 5reminder labels, 2 fixing straps, and installation and use instructions included
•【After-Sale Service】All of our interlocking kits are backed by our commitment to quality. Should our product ever fail to meet your expectations, just reach out via email, and we'll promptly send you a new original replacement at no additional cost

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$25.96

$27.48

-6%

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QYZZRS

QYZZRS Generator Interlock kit Compatible with Siemens or Murray 150 amp or 200 amp Panels,7/8-1 1/4 inches Spacing Between Main & Branch Breaker,Professional and Interlock Kit (1set)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Compatible Models：QYZZRS Generator Interlock kit Compatible with Siemens or Murray 150 amp or 200 amp Panels.
•Interval Space：7/8 - 1 1/4 Inch Spacing between main and generator breaker.
•Installation Note: Before installing the interlocking kit, Attach the screws to the interlock kit first. Let's simulate the use of the test, so that we can better align the installation position, to avoid errors in the installation position, resulting in failure to use.
•What You Get：Our Generator Interlock kit include 1 × Interlock plate, 3 × Hex Nuts, 3 × Shoulder Screws, 2 × Generator Start-Up Procedure Label, 8 × Remind Label, 2 × Zip Ties, 1 × Instruction Bulletin, 1 × Drill Bit.
•Safe & Reliable：This kit avoids the inconveniences that an unexpected power outage can cause. It is used to direct gQY-P2enerator power to any circuit within your home safely. while assuring that you have access to all of your home electrical appliances.

View offer on:

$7.99

$9.99

-20%

Check Price

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