Comparison Table
Last update on 2022-08-09 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API
Watts
When reviewing generators, make sure you pay attention to how many watts the generator produces. In most cases, the higher number of watts a generator can produce, the better it is for your long-term needs. If you find yourself in a situation where an appliance suddenly shuts down, you do not want to overwork your generator by replacing it with another appliance that uses more wattage than the generator is capable of producing. Instead, opt for a generator that produces more watts than you need just in case–if something does go wrong or if you end up using more appliances than initially expected, you’ll have enough headroom to deal with it.
Size
Home generators require space for installation, so factor in the size of any model you're considering. The size of a generator ranges from compact units with a footprint less than 3 feet long to large liquid-cooled units that measure 5 feet or more in length. As a general rule, the more power capacity, the larger the generator will be.
Fuel Source
Gasoline-powered generators are the most common but also carry special cautions related to exhaust fumes and carbon monoxide poisoning. You’ll also need to take measures to keep gasoline stored properly for long periods of generator inactivity. A fuel stabilizer is one method of ensuring that the gasoline in your generator remains ready for use. Propane and natural gas are more commonly used for larger home standby generators. These fuels are generally also considered to be cleaner burning sources of fuel and provide an on-demand source of power.
Warranties
Warranties vary by model and manufacturer, but most residential portable and inverter generators are covered by a two- or three-year warranty that covers parts and labor. Standby generators, which are generally a larger investment, usually offer three- or five-year warranty periods. Many warranties will also cover travel costs for a technician to come and service the generator.
Type
A standby (or backup) generator is the most common option since it offers power outputs between 10,000 and 24,000 watts on average. This type of generator is permanently installed outside the home and is connected to a propane fuel tank or natural gas line. With the addition of a transfer switch, standby generators are ready to supply power for a few hours or a few days or more thanks to a readily available fuel supply and high wattages. Within standby generators, you'll find air-cooled and liquid-cooled models. Residential homes with average power needs will be served well by an air-cooled unit, but in hot climates...