Generators

Claimed output

Maximum wattage for continuous operation, as per the manufacturer.

Fuel type

Gasoline, diesel fuel, propane, or (stationary models only) natural gas.

Weight

The generator’s weight, to the nearest pound, when fully fueled. (Propane tanks are separate, and natural-gas models are fueled externally.) Weight for stationary models, which stay where installed, is "NA," for not applicable.

Fuel shutoff

Lets you draw gas from the fuel system to keep it from leaking, or from fouling parts if it degrades during storage.

Low-oil shutoff

Turns off the engine if the oil level is low, preventing damage.

Electric start

Lets you start the engine with a switch or pushbutton rather than a pull cord.

Fuel gauge

Indicates how much fuel is in a portable generator's tank.

Hour meter

An indicator of how long you have run the generator since your last oil change, helpful for scheduling maintenance.

Low-oil shutoff has indicator light

When the generator has shut off due to low oil, indicates why.

Electric-start battery included

Only some generators with this feature include the necessary battery, which must otherwise be purchased separately (usually about $50).

Wheels

Whether wheels (portable generators only) come standard with the unit or must be purchased separately.

Fuel capacity

For portable units, how many gallons of gasoline or diesel fuel the tank can hold. Tanks for propane-powered portables are the 20-lb. size. Stationary models are fueled externally from a fixed propane or natural-gas tank.

No. of power outlets

How many appliances you can plug directly into the generator (portable units only). We strongly recommend you use a transfer switch for long-term needs.