The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
How to Install a Generator Transfer Switch for Nonstop Power
This electric DIY can provide some much-needed peace of mind when your power goes out
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Get quotes from generator install pros near you
No obligation · 100% free
SKILL LEVEL
Expert
COMPLETION TIME
6 hours
COST
$250–$2,000
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What you'll need:
TOOLS
- Hammer
- Flathead screwdriver
- Electric screwdriver
- Wire trimmer
SUPPLIES
- Screws
- Anchors (optional)
- Locknut
- Bushing
Whether you have a generator that can power your entire house or one that powers a few key appliances, it’s comforting to know that when your electricity goes out, you have back-up power. However, learning how to install a generator transfer switch allows you to flip the generator on easily when the power outage hits.
The steps below outline how to install a generator transfer switch yourself; however, this is an installation best left to professional electricians due to high safety risks for you and your home. Only attempt to DIY generator transfer switch installation if you have extensive electrical experience.
Angi Tip
For a worry-free power backup, leave generator fixes and installations to generator professionals who have the skills, tools, and knowledge required to handle these complex systems.
Prepping to Install a Generator Transfer Switch
If you don’t have a whole-house generator, you’ll need to decide which appliances you want your generator to provide power to before installing your transfer switch. After deciding on your appliances, calculate how much wattage each requires to ensure your generator has enough amps to cover each. On your circuit breaker, give each appliance a number that corresponds with its circuit and label them in the breaker of your switch.
Turn Off Power
Cut off the main power source to your circuit breaker by flipping the switch from on to off. This essential step protects you and your home from electrical shock and injury, so it should always be your first move of an electrical project.
Mount the Switch
Photo: suravikin / iStock / Getty Images Plus / Getty ImagesUsing a screwdriver, mount the transfer switch to the wall next to your main electrical panel, keeping about 18 inches between the edge of the switch and the center of the panel. Depending on what type of wall you’re attaching the switch to, you may need anchors to secure it safely.
Make a Hole in the Breaker
Remove a knockout at the bottom of the electrical panel with a hammer and a flathead screwdriver. Feed the wires from the transfer switch into the knockout hole, and secure the conduit from the transfer switch to the main panel using a locknut and a bushing.
Disconnect the Hot Wire
Start with your first critical circuit and remove the breaker. Disconnect the hot wire lead from the lug on the breaker, then find the red wire for the switch box circuit that matches the breaker you removed and attach the two before reinstalling the breaker.
Connect the Black Wire
Using the same transfer switch circuit, find the black wire and twist it into the old feed wire and secure it with a yellow wire connector. Put the wires neatly in place and repeat steps the previous three steps for the remaining circuits.
Attach the White Neutral Wire
Photo: BanksPhotos / E+ / Getty ImagesAfter all of your circuit connections are complete, locate the white neutral from the transfer switch and attach it to the opening in the neutral bus bar of the main electrical panel. Then, locate the green ground wire in the transfer switch and attach it to an open port on the grounding bar in the main panel.
Test the Switch
Fill in the circuit map on your switch box, then set the switches on it to the line setting. Power to your main breakers should still be off. Attach the power cord from your generator to the switch box, then turn the generator on and let it run for a few minutes.
Flip each switch to GEN one by one, making sure to not turn all switches on at the same time. Once your wattage levels are in balance, turn the switches back to line and turn off your generator.
Restore Power
Once testing is complete, put the cover back on your main circuit breaker and turn the power to your main breaker back on.
DIY vs. Hiring a Pro
This task involves working with some of the most important parts of your home’s electrical system, so it’s best to hire a generator installation company to ensure it’s done safely and correctly. You can expect to pay about $1,200 for a generator pro to install a generator transfer switch.
Although you can save money on labor if you install a generator transfer switch yourself, you also run the risk of installing it improperly and causing damage to your electrical panel or, at worst, making your home vulnerable to electrical fires or shock. In this scenario, hiring a professional generator install will provide peace of mind that your generator transfer switch will work when you need it most.
Frequently Asked Questions
Generator installs reviews from real Angi homeowners in Columbus, OH
Last update on January 19, 2026
- Sarah E.
Joseph did a great job with the staircase and trim. Timely and efficient, clear communication about the work, very fair pricing. For the stairs in particular, done very skillfully in an old house (1893) in a tight spiral, and very creative with how to do the handrail. Did a nice job with...
Vouis Trim Carpentry L.L.C. - Maggie M.
Jason has helped me with multiple household projects, with the most recent being new door installation. He has always showed up on time and organized and has done an incredible job! Jason is very professional and he's now my go-to for anything around my house that needs to be fixed or...
Huff Garage Rescue, LLC - Jeanann S.
Very professional, knowledgeable and helpful! Completed the install on time and as expected.
Ward's Services - Grace G.
Excellent, Prompt, Courteous Service!!! They were super friendly and quite personable. I felt very comfortable with the gentlemen that did the installation. They installed it exactly where I asked them to and they did an excellent job!! I loved their service so much.
Tether House - Lauren R.
The Mosby team went above and beyond for my project. They not only installed my light fixture; they also worked through an old, wonky, and as it turns out incorrect wiring issue from the work of prior contractors. Professional, thorough, conscientious, and kind. Five star experience. Thank you!
Mosby Electric - David E.
Window Depot did an amazing job installing the windows in my basement! The process from start to finish was by far more than what I expected. I would highly recommend Window Depot if you want professionalism from the the consultation to the installation. Dont settle for mediocre when you can...
Window Depot USA of Central Ohio - Mary O.
The guys did an outstanding job and we had a great experience with CarifaTile. I appreciated that Joe reviewed the quotes with me and set expectations prior to the install. The crews showed up as scheduled and always left the areas clean upon leaving the house. We will definitely use...
CarifaTile - Matthew L.
Called ahead and worked quickly to install keyless locks on vintage wooden doors.
Expert Lock and Key, LLC - Locke M.
We had a 20+ year old landscape lighting system that needed replacement. Midwest Lightscapes worked with us to design a much improved lighting system, lighting the exterior of the house and the back yard. Installation of the 45 light system took one and one-half days, and went very smoothly....
Midwest Lightscapes - Jake H.
Did an amazing job transforming my yard. Also installed sod in places, would recommend to everyone.
Cardinal Landscaping & Construction LLC
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