Best Circuit Breaker Panels of 2026

"I was impressed by the solid build and precise fit of this generator interlock on my panel. The installation was straightforward, even with the instructions being for an older version—I just had to drill one extra hole, which was simple enough. The interlock performed perfectly during a generator test. Highly recommended for anyone needing a mechanical interlock, as long as it’s compatible with your panel."

"After installing this on my electrical panel, I found the operation to be smooth and the material thick and sturdy. The only thing to note is that the pre-drilled holes on some panels might not line up perfectly with the instructions, but that’s an issue with the panel, not the interlock kit. I just drilled the holes a bit higher and it worked out fine."

"I own a Square D QO panel with a bottom-center 200 amp main breaker and a 50 amp generator inlet breaker on the left. This interlock fit perfectly and was simple to install. It’s user-friendly and I would definitely recommend it to others."

"I’m really happy with how this kit fit perfectly in my Eaton panel and the labeling stickers were exactly what I needed to get through inspection. Everything works as expected."

"As a licensed electrician, I found the stainless hardware and included drill bit top-notch. I did have to trim down the upper piece about 3/16 inch, but after that, it worked great. I’d recommend it!"

"This interlock kit was easy to install for my emergency generator outlet. It fits well in the breaker panel and does its job with no issues."

"I found the installation to be quick and straightforward, and all the necessary hardware was provided. It’s very effective at making sure both breakers can’t be on at once. I also appreciated the extra warning stickers for safety. I’d definitely recommend it!"

"This was exactly what I needed for my Square D panel. It’s simple to use and does the job as described. The overall quality impressed me and I have no complaints."

"The product works well, but I did notice the drill bit was a bit too small for the bolts and the lock washers are thicker than ideal. Once installed, though, it’s an excellent solution for my panel."

"I found it to be an affordable and straightforward solution for making sure the main breaker and generator breaker can't be on at the same time. The included warning stickers were a nice touch, and the install went smoothly for me. I feel safer knowing both breakers can't be engaged together."

"The kit fit perfectly on my 200 amp Square D panel. Installation was quick, especially with the included drill bit. Just be careful to line up the holes properly, or the interlock won't operate smoothly. Overall, I'm very happy with the result."

"I wasn't completely sure how to put it in at first, but the process turned out to be pretty easy to figure out. The kit had everything I needed, except for the breaker. I did have to move some breakers and reroute wiring, so if you're not comfortable with that, you might want to call a pro. Worked great for my setup!"

"I found the installation to be quick and straightforward, and every part I needed was included in the kit. The safety aspect gives me peace of mind—definitely a must-have addition."

"The directions were clear and easy to follow. All the components fit together seamlessly, and the lockout mechanism works flawlessly. My only minor issue was the drill bit, which was a bit off, but it didn’t affect the install much."

"This interlock switch made it simple to switch between grid power and my solar generator. It was a breeze to mount in my electrical panel, and works exactly as I hoped."

"The quality and fit were excellent, and installation was a breeze. Everything I needed was included, and the parts aligned perfectly with my panel."

"I have an older Cutler Hammer panel, and this interlock fit it perfectly. The instructions were clear enough and the components are solid. Definitely a confident purchase if you pick the right model."

"Just make sure you select the correct panel type—these work exactly as they should and fit flawlessly."

"I found this interlock kit to be an outstanding value—it fit my electrical panel perfectly and was a breeze to install. Most importantly, it prevents accidental grid backfeeding by making sure my generator and main breaker can't be on at the same time."

"Using this kit with my Eaton main breaker panel and 50-amp generator inlet was a good experience overall. The bracket fit well, and it even came with warning labels. I do wish it included thread locker for the screws, but aside from that, I'd definitely buy it again."

"As an electrical contractor, I've found these interlock kits are the best affordable solution out there. They're easy to install if you have a good eye for precision. Just be cautious with the drill bit quality and always be honest about your skill level—sometimes it's best to call a pro."

"I'm really happy with this interlock kit—the installation was simple, and it fits perfectly on my Eaton panel. The secure power transfer gives me confidence during outages, and the build quality is impressive. Definitely a great value for anyone wanting a dependable generator solution."

"The heavy-duty steel used in this kit stands out. I feel confident it will hold up through multiple storms."

"This kit works exactly as advertised with my Eaton panel. It's reassuring to have a dependable way to transfer power when the electricity goes out."

"I was impressed by the solid build quality and excellent value of this breaker. It fit perfectly in my panel and worked just as I needed."

"Finding this breaker online was a relief since it was out of stock locally. It arrived quickly, was cheaper than in store, and matched my requirements exactly."

"I used this Square D 50A 2-pole breaker for a new welding outlet and it dropped right into place. No surprises—dependable as always."

"I thought I'd need to buy an expensive interlock panel for my backup generator, but this simple mechanical interlock let me install a 50 amp breaker directly into my existing panel. It’s very safe because it prevents the main and generator breaker from being on together, and I can choose any circuit I want to power. Just had to move a couple of breakers to make space."

"This product made wiring my generator easier and saved me money compared to buying a separate panel. The mechanical interlock works perfectly for safety. Only thing I noticed was I had to slightly grind down a tab for the main breaker to fit."