Westinghouse ST Switch Portable Automatic Transfer Switch, Black & White — Smart Switch Ready, 2×120V 2400W

The Westinghouse ST Switch is a portable automatic transfer switch that converts a compatible portable generator into a home standby-style backup source for essential 120V circuits.

The ST Switch gives homeowners an easy, do-it-yourself way to maintain power to critical items—like sump pumps, refrigerators, furnaces, and security systems—without rewiring or hiring an electrician. Designed for use with generators that feature a Smart Switch Ready port and an L14-30R outlet, this compact unit monitors utility power and automatically shifts load to generator power when an outage occurs, while also maintaining battery charge when utility power is present.

How does the ST Switch detect a power outage and start a generator?

The ST Switch continuously monitors incoming utility voltage and communicates with compatible Smart Switch Ready generators. When it senses a sustained loss of utility power, it signals the generator to start and then routes power to the connected 120V outlets once the generator is supplying stable voltage.

• 24/7 standby utility monitoring for instant detection
• Smart Switch Ready control cable (25') to signal generator start
• Integrated L14-30P power cord (25') for straightforward connection
• Automatically returns to utility power when grid voltage is restored

What appliances can I run and for how long?

The ST Switch provides two 20A 120V 5-20R outlets that support up to 2,400 watts total, making it suitable for essential small loads rather than whole-home coverage. It’s ideal for keeping pumps, refrigeration, medical device chargers, and heating controls running through short- to medium-length outages.

• Runs two 20A 120V circuits (combined 2,400W maximum)
• Good for sump pumps, refrigerators, furnace controls, security systems
• Not intended to power whole-home high-demand appliances concurrently
• Use load-priority planning to maximize runtime on a given generator

Do I need an electrician to install the ST Switch?

No electrician is required for standard installation: the ST Switch is built for plug-and-play setup with compatible Westinghouse or other Smart Switch Ready portable generators. It comes with long cables so you can position the unit near appliances or the generator without complex rewiring.

• Comes prewired with a 25' generator control cable and 25' L14-30P cord
• Compact, lightweight design under 9 pounds for easy placement
• Simple plug-and-play operation—no panel modifications needed
• Follow manufacturer instructions for safe outdoor/indoor placement

What safety and maintenance features should I know about?

The ST Switch helps maintain battery charge while utility power is present and returns power to the grid automatically when safe, reducing manual intervention. Routine checks of cable connections and generator readiness will keep the system reliable when you need it.

• Battery-charging feedback while connected to utility power
• Automatic reconnection to utility power after restoration
• Lightweight housing for convenient storage and transport
• Regular inspection recommended for cords and environmental exposure

Who is this for: The Westinghouse ST Switch is aimed at homeowners who want a low-cost, easy-to-install way to protect essential circuits during outages without rewiring their electrical panel. It suits users with a compatible Smart Switch Ready portable generator who need reliable backup for sump pumps, refrigeration, furnaces, security systems, and similar 120V appliances.