DuroMax Generators: Dual-Fuel and Tri-Fuel Buying Guide

Updated September 26, 2026

DuroMax offers portable generators with gasoline, propane, and—in some models—natural-gas capability. Fuel flexibility can strengthen an outage plan, but no generator is something “every prepper needs.” Choose from measured electrical loads, safe operating space, fuel availability, noise, maintenance, and transfer equipment.

Dual fuel versus tri fuel

Dual-fuel models generally operate on gasoline or propane. Tri-fuel models add natural gas. Output can differ by fuel, so compare running watts—not only the largest peak-watt number—on the fuel you expect to use.

Calculate the loads

List running watts and startup surge for refrigerators, freezers, pumps, furnaces, communications, and selected outlets. Large motors and compressors can exceed a generator’s surge capability even when total running watts look acceptable.

Plan which loads will run together. A smaller generator serving essential circuits may consume less fuel and be easier to move than a high-output unit intended to carry many appliances.

Portable generators stay outdoors

The U.S. Consumer Product Safety Commission warns that portable generators must operate outdoors at least 20 feet from the home, with exhaust directed away from windows, doors, and vents. Never run one in a garage, basement, crawlspace, shed, or other enclosed area—even with doors open.

Maintain battery-backed carbon-monoxide alarms on every level and outside sleeping areas.

Connect power safely

Use properly rated extension cords for direct appliance connections or have an electrician install approved transfer equipment and an inlet. Never backfeed a home through a receptacle. Protect connections from rain according to the manual without enclosing the generator or restricting cooling and exhaust.

Fuel planning

• store gasoline only in approved containers and rotate it safely;
• keep propane cylinders upright and within applicable limits;
• have natural-gas capacity and connections verified;
• never refuel a hot or running generator; and
• calculate runtime at the expected load, not just at idle.

Current DuroMax options

The active DuroMax XP9500iH dual-fuel inverter generator provides gasoline and propane flexibility. The active DuroMax XP13000HXT tri-fuel generator adds natural-gas capability. Compare running output by fuel, receptacles, weight, sound, CO-shutoff features, warranty, and availability.

Bottom line

A DuroMax generator can be a useful backup-power tool when correctly sized and operated. Fuel flexibility does not replace safe outdoor placement, CO alarms, approved electrical connections, maintenance, and realistic fuel storage.