To help you make better sense of your size options, we break our inverter generators into four groups, divided by their output wattage:
Large Inverter Generators
Most large inverter generators in our ratings weigh from about 150 to about 300 pounds (wheels included). That’s too heavy to haul along on a camping trip or to a tailgate party, but it’s big enough to power your house. These models generate 5,000 watts or more.
The largest inverter generators have 220-volt outlets that can be connected directly to your electrical panel with a safety device called a transfer switch, which CR strongly recommends. That allows the generator to power entire circuits in your home rather than requiring you to plug in individual appliances and electronics with extension cords.
Midsized Inverter Generators
Midsized inverter generators weigh 80 pounds or more and may or may not come with wheels. They produce 2,500 to 5,000 watts, but you can’t connect them directly to your electrical panel with a transfer switch because they lack 220V connections. That means you can’t use them to power equipment such as a water heater or a well pump. Instead, you plug appliances or electronics directly into the generator, which is less convenient.
This size is well suited for tailgaters or users of recreational vehicles. These models put out all the power you need for plug-in appliances like a toaster or microwave, and they’re light enough to unload and carry away to a safe distance from your vehicle or RV before use.
Small Inverter Generators
Small inverter generators weigh 50 to 60 pounds and generate 1,500 to 2,500 watts. That’s enough to be a steady source of basic backup power for a fridge, some lights, and a phone charger—but not much else. These units can’t be connected to a circuit breaker panel or used to power any hardwired device that doesn’t have a standard two- or three-prong plug.
Many small recreational inverter models have user-friendly features such as fuel-level indicators; some have wheels. They’re designed to be carried with one hand.
Compact Inverter Generators
Compact inverter generators weigh 30 to 40 pounds and produce around 1,000 watts, enough power for light-duty tailgating or camping. These units lack convenience features like fuel gauges or standard wheels.
Because they’re small and light, they’re designed for convenient, one-hand carrying. But they still can’t be brought inside safely. “Even a smaller generator can emit hazardous levels of CO in an enclosed space, so make sure you get a unit with CO safety technology and follow placement guidelines,” Trezza says.
