Generators that run on gasoline, propane or natural gas, so they can run for days from a house's gas line during a long outage.
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Best Tri-Fuel Inverter Generators: Large
- Westinghouse iGen8200TFc#1 of 5Full review
A tri-fuel inverter for home backup through a transfer switch, with clean power and a 50 A outlet. Natural gas hookup makes it a strong pick for long outages.
Amazon $1,399$1,3996,6006017$0.21 - Champion 6500W Tri Fuel Inverter#2 of 5Full review
A mid-size home-backup inverter for people with a natural gas line or a transfer switch who want unattended starting. It also covers a 30 A RV.
Amazon $1,299$1,2995,2506418$0.25 - WEN TF1050iX#3 of 5Full review
A tri-fuel home-backup inverter that can sit on natural gas indefinitely. Good for a transfer switch or a 50 A RV.
WEN $1,649$1,6498,5506610.5$0.19 - GENMAX GM8000iETC#4 of 5Full review
A mid-priced tri-fuel inverter for home backup through a transfer switch, especially for houses with a natural gas line. Auto start, app control and CO shutoff are unusual at this price.
Amazon $1,499.99$1,499.996,0006210$0.25 - Champion 10000W Tri Fuel Open Frame#5 of 5Full review
A big, low-cost-per-watt open-frame inverter for whole-house backup on gas, propane or natural gas. Too loud for campgrounds.
Amazon $1,398.82$1,398.827,7507215$0.18
