Best Tri Fuel Generator with Low Thd (2026): 4 Picks

The listing states gasoline at 13500 peak watts and 11500 running watts, propane at 12500 peak watts and 10500 running watts, and natural gas at 10500 peak watts and 9500 running watts, with a dedicated fuel selector switch. It states 3% or less THD pure sine wave power, a 550cc 4-stroke OHV engine, a 120V/240V 14-50R outlet, a 120V L5-30R outlet, 120V 5-20R GFCI outlets and 12V DC ports, 5 start methods including push-button electric start, remote key fob start, Bluetooth app control, recoil backup start and ATS 2-Wire Auto-Start, Eco-Mode, 62 dB(A) at 25% load, up to 11.2 hours on a 6.9-gallon tank, a built-in LED light, overload, over/under voltage, short circuit and overheating protection, a CO Shield automatic shutdown system, a digital monitor and CARB certification, with a 3-year limited warranty.

Who it's for: a home backup, RV or camping buyer who wants tri-fuel watts, low THD and 5 start methods. Who should skip it: a buyer who wants a light unit to carry, given 273.68 pounds, or a buyer who needs parallel connection, which the listing does not mention.

Its Solar Score of 9.7/10 comes from performance 32/35, build 21/25, value 21/25, safety 9/10 and warranty 3/5: 86 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 3 November 2026. Performance figures are manufacturer rated.

What this listing states. CO Shield automatic shutdown, overload, over/under voltage, short circuit and overheating protection, CARB certified, so safety scores 9 of 10. 3-Year Limited Warranty. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.

Inverter limits. Stay within the stated continuous watts (surge watts last only a moment), use the cable size and fuse the manual gives, ventilate it, and never connect an inverter to home wiring yourself; that is work for a licensed electrician.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The title states 14500 peak watts, tri-fuel home backup, remote electric start, transfer-switch readiness and gasoline, propane and natural gas power. The bullets add 11500 running watts and 14500 peak watts on gasoline, a 550cc engine with pressure lubrication and a reusable oil screen, less than 5% THD, up to 19 hours at 25% load on a 9.5-gallon gas tank, push-button and remote start, 50A and 30A outlets, automatic low-oil shutdown and a CO sensor. The spec table gives 230.0 pounds and 27.2 by 26.1 by 26.5 inches, and lists a 3-year limited warranty that matches the bullets. No propane or natural gas watt figures are stated, and no noise figure in dBA is stated.

Who it's for: homeowners who want tri-fuel choice with high gasoline watts and remote start. Who should skip it: buyers who want stated propane watts or a lighter unit.

Its Solar Score of 9.7/10 comes from performance 33/35, build 21/25, value 20/25, safety 8/10 and warranty 4/5: 86 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 3 November 2026. Performance figures are manufacturer rated.

What this listing states. Automatic low-oil shutdown and CO sensor stated, so safety scores 8 of 10. 3-year limited warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.

Inverter limits. Stay within the stated continuous watts (surge watts last only a moment), use the cable size and fuse the manual gives, ventilate it, and never connect an inverter to home wiring yourself; that is work for a licensed electrician.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The listing states a 12500W tri fuel generator with electronic fuel injection, a single dial that switches fuel sources without shutting the unit down, propane running watts of 8550W, natural gas running watts of 7000W, electric start with recoil backup, a 12V 9Ah battery, COsense technology with an audible alert and automatic shutdown, runtime up to 14 hours at 25% load and 10.5 hours at 50% load on gasoline from a 7.5-gallon tank, runtime up to 6 hours at 25% load from a 20-pound propane tank, a panel with a 120V 20A GFCI duplex outlet, a 120/240V 30A twist-lock outlet and a 120/240V 50A outlet, 9.5-inch never-flat wheels and a 1.25-inch steel-tube cradle. The bullets give a 219-227 pound range, while the spec table lists 227.0 pounds, and the warranty is a 3-year residential and 2-year commercial limited warranty.

Who it's for: buyers who want gas, propane and natural gas options with stated running watts on propane and natural gas. Who should skip it: buyers who need a stated noise figure or a lower weight.

Its Solar Score of 9.7/10 comes from performance 32/35, build 22/25, value 21/25, safety 8/10 and warranty 2/5: 85 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 3 November 2026. Performance figures are manufacturer rated.

What this listing states. COsense technology monitors carbon monoxide levels, triggers an audible alert, and shuts the generator down automatically, so safety scores 8 of 10. 3-year residential and 2-year commercial limited warranty. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.

Inverter limits. Stay within the stated continuous watts (surge watts last only a moment), use the cable size and fuse the manual gives, ventilate it, and never connect an inverter to home wiring yourself; that is work for a licensed electrician.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

The listing states a 79.7cc OHV engine, 2450 peak watts and 1800 running watts on gasoline, pure sine wave inverter power, 33 lb, a CO sensor with auto-shutdown, parallel readiness with a kit sold separately, 58 dB at 23 feet with 25% load, 2 x 120V 20 Amp outlets and 2 x USB outlets, Eco-Mode and up to 3.8 hours at quarter load with a 2L fuel tank, plus UL 2201 in the title. The title gives 17kg while the bullets give 33 lb, so the weight figures do not agree.

Who it's for: a camper or RV traveler who wants a light gasoline unit for small loads. Who should skip it: a buyer who wants tri-fuel use or a stated THD figure, since this listing states gasoline only and no THD figure.

Its Solar Score of 9.4/10 comes from performance 23/35, build 19/25, value 19/25, safety 8/10 and warranty 0/5: 69 of 100 points, placed on our 9.2 to 9.8 scale.

Figures as published on the retailer listing, collected 3 November 2026. Performance figures are manufacturer rated.

What this listing states. UL 2201 and CO sensor auto-shutdown, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.

Inverter limits. Stay within the stated continuous watts (surge watts last only a moment), use the cable size and fuse the manual gives, ventilate it, and never connect an inverter to home wiring yourself; that is work for a licensed electrician.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.