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The first cold fronts and mountain snowstorms have arrived, and losing power gets more costly when there’s a refrigerator full of food and a house to keep warm. Amazon has generators from Champion, Westinghouse, WEN, and DuroMax on sale for up to 40 percent off. The standout is the Champion 4000W Dual Fuel Inverter Generator for $719 (was $899), a $180 savings. It runs on gasoline or propane, giving you a second fuel option when supplies are tight.

Buying before the next storm gives you time to read the manual, test the generator, and arrange how you’ll connect the appliances you need. The deals range from smaller inverters for a few essentials to larger dual-fuel generators and tri-fuel models for heavier loads. If you want to supply household circuits, have an electrician install the appropriate transfer equipment before an outage. Prices start with the AIVOLT 4200W Inverter Generator for $299.98 (was $359.99).

Our Favorite Generator Deals

Champion 4000W Dual Fuel Inverter Generator

Now $719 (was $899)

Buy at Amazon

Photo: Amazon

Choose gasoline or propane to power a few essentials during an outage. This dual-fuel inverter generator delivers 3,000 running watts on gasoline or 2,700 on propane and includes CO Shield carbon monoxide shutoff.

Westinghouse 4650W Portable Generator

Now $399 (was $499)

Buy at Amazon

Photo: Amazon

Supply up to 3,600 running watts for appliances and lights within the generator’s capacity. This gas-powered generator has recoil starting, a 4-gallon fuel tank with a fuel gauge, and automatic low-oil and carbon monoxide shutdown.

DuroMax 13,000W Tri-Fuel Generator

Now $1,499 (was $2,499)

Buy at Amazon

Photo: Amazon

Choose gasoline, propane, or natural gas to suit your fuel supply and installation. This tri-fuel generator delivers up to 10,500 running watts on gasoline for larger backup loads; output is lower on propane and natural gas.

More Generator Deals for Winter Backup Power

The wattages in these additional generator deals are advertised starting or peak ratings; check continuous output on your intended fuel before buying. Operate any fuel-burning generator outdoors, at least 20 feet from the house, with exhaust directed away from buildings—never inside a garage, even with the door open.