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    Automatic Transfer Switches

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    Automatic Transfer Switches

    What is an automatic transfer switch?

    When you rely heavily on your electrical system, whether it’s for your home, your business, or otherwise, sometimes you can’t afford to take the time to throw a manual transfer switch to power your generator or other power source. In cases like these, it’s time for an automatic transfer switch. Automatic transfer switches and automatic generator switches can detect a loss of power and then transfer electricity from one source to another, all while isolating the generator and designated circuits from the rest of the electrical system.

    How does an automatic transfer switch work?

    Automatic transfer switches perform multiple actions very quickly as soon as an outage is detected. They can utilize either a “break before make” mechanism, which breaks the connection to the utility before connecting to the second power source, or a “make before break” mechanism, which creates the second connection before the first is broken.

    Rugged, durable, and versatile, automatic transfer switches can be configured to only provide power to certain crucial, pre-selected circuits in an emergency situation. They are a common choice across industrial and commercial applications due to their convenience and reliability of transferring essential electrical loads.

    Same-day shipping available
    24-hour emergency support
    Global supplier network
    1-year Warranty

    Find your automatic transfer switch at Bay Power.

    Residential, commercial, industrial, agricultural, municipal - Bay Power carries all the automatic transfer switches you could need. From Generac automatic transfer switches to Asco automatic transfer switches, our product lineup includes all the industry’s top automatic transfer switch manufacturers including Eaton, Schneider, ABB, Square D, Siemens, and more.

    Our inventory includes 30 amp automatic transfer switches, 50 amp automatic transfer switches, 400 amp automatic transfer switches, 100 amp automatic transfer switches, and 200 amp automatic transfer switches, as well as single phase and 3-phase automatic transfer switches.

    Single-Phase Automatic Transfer Switches

    Used wherever single phase power is needed, single phase automatic transfer switches safely transfer power from your utility to your standby power source. They are used for lighter electrical loads across residential and commercial applications for appliance and lighting circuits.

    3-Phase Automatic Transfer Switches

    Since 3 phase power is typically used for heavier electrical loads, 3 phase automatic transfer switches are used for heavy duty applications. Common applications include industrial, agricultural, telecom, and anywhere you’d find heavy motor loads. Available across a number of voltage and amperage ratings, 3 phase automatic transfer switches are crucial to these sectors for delivering uninterrupted power.

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    Why Bay Power

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    Sell to Us

    Fill your wallet, not the landfill.

    Have any old or unused Automatic Transfer Switches lying around? Don’t get rid of them just yet. While we stock a wide range of quality electrical products and solutions, both new and reconditioned, we also buy back your unwanted equipment. So, before deciding what to do with your old Automatic Transfer Switches and components, have one of our expert technicians take a look to see if we can save a few parts, save the environment, and save you some cash.

    Sell to Us



    Great service shouldn’t end after the purchase. We pride ourselves on the relationships we build with our customer-first mentality and the quality of our Automatic Transfer Switches and components. That’s why we offer a 1-year replacement warranty on all of our electrical products and solutions from the top manufacturers. Because when you buy with Bay Power, you buy with confidence.

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    Product Condition FAQ

    We are proud to stock a variety of competitively priced, new and reconditioned components from the leading manufacturers of Automatic Transfer Switches.


    Thanks to our extensive inventory of Automatic Transfer Switches and components, our resourceful and expertly trained staff will always be able to get the products that you need. Through our extensive network of suppliers, we are able to carry and acquire a huge variety of electrical products and solutions, so chances are if you need it, we can get it.


    Bay Power’s priority is providing you with reliable, high quality electrical hardware. That’s why our mission is to make sure our reconditioned electrical products and solutions function as perfectly as the day they were built. Because while the quality is high, the cost of Automatic Transfer Switches shouldn’t be.

    New Surplus

    Our selection of new surplus Automatic Transfer Switches may not arrive brand new in a box, but they function just as well, and have never had electricity run through them. All of the quality, none of the packaging, always with our 1-year replacement warranty.