For gas generators: Use ethanol-free gas treated with fuel stabilizer, and keep the tank full when not in use. Also, keep a ...

They can run on natural gas, which provides an essentially limitless source of fuel, or on a large propane tank, which needs to be refueled much less often than the gas tank on a portable generator.

See products from Briggs & Stratton, Dragon Products, 2G Energy, Axiom Energy Group, Qnergy, Enginuity Power Systems, Evergreen Mobile Power and EC Power.

The generator is connected to your natural gas line (or a large propane tank if you do not have gas service), and the switch is wired to your home's electrical panel.

Comparing gas-powered portable generators to propane-powered models All kinds of generators can be called portable, but despite having wheels, many remain large, heavy and awkward to move around. P… ...

These models juice up your refrigerator, air conditioner, and other essentials during an emergency—no matter what.

Best Small Whole-House Generators The best small whole-house generators in our ratings put out less than 10,000 watts of power but often run longer on propane than larger standby generators.