Our pick for the best overall standby generator, the Generac Guardian, is selling on Amazon for less than anywhere else.

Get help calculating what size generator you need. Plus, advice on whether to pay more for an inverter model, or even invest in a whole-home generator.

This means that when the power grid fails, an automatic transfer switch senses the outage and smoothly activates the generator within seconds. Generators can be powered by natural gas or even propane, ...