Inverter generator1/2/2024 Instead, you plug appliances or electronics directly into the generator, which can be dangerous if you don’t follow certain safety guidelines. They produce 2,500 to 5,000 watts but don’t allow the recommended option of connecting to an electrical panel with a transfer switch. These weigh 80 pounds or more and might come with wheels. That allows them to power entire circuits in your home rather than having to plug in individual electronics with extension cords. This category of inverter generator can be connected directly to your electrical panel with a safety device called a transfer switch, which CR strongly recommends. They generate 5,000 watts of power or more (at 220 volts). That’s too big to haul along to a tailgate party but big enough to power your house. With very few exceptions, the large inverter generators in our ratings weigh around 250 pounds or more (wheels included). To help you make better sense of your options, we break our inverter generator ratings into three groups: In 2020, CR expanded its safety tests to distinguish between generators that simply have these safety features and those we’ve found to be demonstrably safer in various scenarios. Only those with it can earn our recommendation, regardless of how well the models perform otherwise. The best generators come with both features.Ībout half of the inverter generators in our ratings have the automatic CO shutoff. And some also have engines that emit less CO in the first place. To reduce the risk of carbon monoxide poisoning, some new portable generators feature a built-in sensor that triggers an automatic shutoff if CO builds up to dangerous levels in an enclosed space. “Inverter generators are generally quiet enough not to drown out nearby conversation,” says Misha Kollontai, who oversees CR’s generator testing. Inverter generators also produce lower emissions-and less noise. The resulting improvement in efficiency means that you won’t have to fill up the gas tank as often. An inverter generator electronically throttles the engine up and down to meet demand, instead of running full tilt all the time. As a group, inverter generators are more expensive than conventional portable models, but they have distinct advantages.
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