Search  for anything...
Westinghouse

Westinghouse Outdoor Power Equipment ST Switch with Smart Portable Automatic Transfer Technology Home Standby Alternative, For Sump Pumps, Refrigerators, and More, Black and White

  • Based on 171 reviews
Condition: New
Checking for the best price...
$281.45 Why this price?

Buy Now, Pay Later

As low as $46.91 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Mar 8
Order within 8 hours and 30 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Style: Smart Transfer Switch


Features

  • INNOVATION YOU CAN BE SURE OF: DIY smart portable automatic transfer switch brings dependability with versatility for a cost-effective power solution; Runs your security system, sump pump, refrigerator, furnace, or electrical appliance with 20A 120V 5-20R outlets for up to 2400 watts
  • JUST PLUG-AND-PLAY: Small and ultra-portable at 9 pounds; Quick, easy installation with no electrician required; Comes with a 25 generator Smart Switch Ready control cable and an integrated 25 L14-30P power cord; If utility power lines communicate power failure, it instantly switches power source
  • SMART SWITCH TECHNOLOGY: Standby utility power monitoring ensures immediate feedback to start your generator, while simultaneously charging the battery, to support connected household appliances via Smart Switch Ready outlet
  • EASY OPTION FOR AUTOMATIC BACKUP: The ST Switch is engineered to bridge the gap between traditional portable generators and standby generators. It's made to work only with generators that have a Smart Switch Ready port and an L14-30R outlet
  • AROUND-THE-CLOCK MONITORING: Made to track household power loss during emergencies or blackouts 24/7 and keep power on for 20A appliances or electronics up to 2400 watts

Description

Easy to use with no electrician required, the ST Switch is a do-it-yourself smart portable automatic transfer switch that automatically transfers utility power to power from your portable generator. Made to work with generators that have a Smart Switch Ready port and an L14-30R outlet, the ST Switch is engineered to bridge the gap between traditional portable generators and standby generators by introducing home standby functionality with cost- effective versatility to provide a complete home backup power solution. The ST Switch also keeps the battery charged while connected to utility power. Compact and lightweight at less than 9 pounds, it’s ultra-portable and can be conveniently placed any location it’s needed. Maintaining support for your security system, sump pump, refrigerator, furnace, or essential household appliance is now more effortless than before. With dependability and added flexibility, the Westinghouse ST Switch enables you to have peace of mind around-the-clock.

Brand: Westinghouse


Wattage: 2400 watts


Power Source: Gas Powered


Recommended Uses For Product: Monitoring


Item Weight: 9 Pounds


Voltage: 120 Volts


Output Wattage: 2400 Watts


Special Feature: Portable


Included Components: ST Switch, 25 ft. L14-30P Cord, 25 ft. generator control cable


Color: Black and White


Brand: Westinghouse


Wattage: 2400 watts


Power Source: Gas Powered


Recommended Uses For Product: Monitoring


Item Weight: 9 Pounds


Voltage: 120 Volts


Output Wattage: 2400 Watts


Special Feature: Portable


Included Components: ST Switch, 25 ft. L14-30P Cord, 25 ft. generator control cable


Color: Black and White


Material: Aluminum


Model Name: with Smart Portable Automatic Transfer Technology


Engine Type: 4 Stroke


Engine Displacement: 418 Cubic Centimeters


Current Rating: 20 Amps


UPC: 850008720994


Manufacturer: Westinghouse


Global Trade Identification Number: 94


Product Dimensions: 5 x 10 x 8 inches


Item Weight: 9 pounds


Item model number: ST Switch


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 8

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Economical autostart generator solution...
This is a great option if your Westinghouse generator is relied upon to produce immediate standby power at an unattended location during a power failure. The wattage rating on the ST switch is lower than the capacity of most Westinghouse generators and it will only power 120 volt equipment, but this really doesn't matter. The main thing it does is detect loss of mains voltage to automatically start the generator and supply power to the essential items connected. For most, it will be a refrigerator or freezer at a remote cabin, though we use it at a radio station to keep emergency power on the microwave link used to send audio from studio to remote transmitter. Should you need to supply emergency 220 volt or high wattage equipment, you could use this box to power a relay that would transfer such gear's power cord from mains to the dedicated outlets on the generator. As far as I know, there are no autostart generator products in this price range...seems a good value for the money! ... show more
Reviewed in the United States on September 20, 2025 by Rich Langsford
    • Broke after 45 minutes of use... useless support staff
First, the manual lists an optional part to extend the cables by 25ft (STCORD25), which I needed in my install. When I asked support where I could get one, they told me Home Depot or Lowes. I checked both stores (in person and online), and had no luck. Couldn't even find it in their catalogs. When I told support this, they basically told me I was wrong and it must be there. (Check for yourself, it isn't.) They then found a $25 6ft option from Walmart/eBay, which would have cost more than the 25ft power cable extension that is also required (3021225C). Finally, they told me I could buy a second ST Switch from Lowes or Home Depot. Besides not wanting to purchase a complete second ST Switch for an extension to the control cable, it wouldn't even work because the cable that comes with the ST Switch is not a male to female extension cable. When I told them this, they stopped responding. Then, after 45 minutes of use, the transfer switch switched back to the (dead) utility power, and despite my best efforts to get the switch working again, the most it will do now is start the generator when the utility power goes out. It won't transfer the load or stop the generator when utility power comes back on. The support staff completely ignored me when I tried to contact them about this issue. ... show more
Reviewed in the United States on July 20, 2021 by John
    • Automatically starts your Westinghouse generator.
Review Image by Bernard Johnson Bernard Johnson
A must have option for Westinghouse generators that have the ST Switch option. When the power goes out in your home, this signals the generator to automatically start up and supplies AC power to the outlet. I use it for our sump pump. You can use it for a frig or freezer. If you’re not home, it powers up automatically protecting your important item. Westinghouse generators are the only ones that have this option. ... show more
Reviewed in the United States on September 21, 2025 by Bernard Johnson Bernard Johnson
    • I don't know what took me so long.
Review Image by Rohn Rohn
Review Image by Rohn Rohn
Review Image by Rohn Rohn
For the life of me, I don't know why it took me so long. For 25 years I have been dragging out my wheel-less COSTCO Generac 5,000 Power Plus "The Old Red Sled" generator. It gave my all electric home most of what I needed. But as the years went on, my minimum power requirements have changed significantly and 5,000 watts is insufficient to give my bare minimum requirements. I also, really want the ability to use propane as gasoline goes bad over time. And the last power outage, I wiped out my back ripping on the recoil starting cord. Time to upgrade. My neighbors had a Duramax 12,000 Duel Fuel I was checking out during the last power outage. I was impressed, but at the $1,300.00 price tag, not so much. Then as my research continues, I run into the WGEN9500DF. The quality was on the same level as Duramax, in a slightly more compact frame, undercutting price, slightly higher starting wattage, and more options. Remote starting - I can now start or stop my Generator from my bed. ST Switch capability - With a small additional investment, I now have an Automatic Backup Generator of 2,400 Watts, 20 Amps to automatically provide heat, power to my UPS that powers my and Entertainment/Communications Control Center, and a few LED lights for my living room. This is great for shorter outages. So, for the same price as my neighbors paid for their Duramax 12,000 I also got a remote start, and automatic transfer switch. I do not need to tell you which one of us regrets their decision. ... show more
Reviewed in the United States on March 1, 2021 by Rohn Rohn

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...