New & Used Dual Fuel Generators for Sale: Flexible Fuel Power for Frontier Markets
USP&E stocks an independent inventory of new and used dual fuel generators: engine-driven gensets capable of running on heavy fuel oil, diesel, and natural gas within the same unit. Our dual fuel inventory includes:
- Wartsila 32DF and 50DF series
- MAN 35/44DF and 51/60DF engines
- Hyundai HiMSEN H32/40DF dual fuel sets, and
- Caterpillar MaK dual fuel units.
Power ratings span from 5 MW single sets to 50 MW multi-unit plants, available in 50 Hz and 60 Hz configurations. Dual fuel gives operators the ability to switch fuel sources in response to local supply or price conditions, which is particularly valuable in island grids, pipeline-edge utilities, and mining operations with variable fuel logistics. As an EPC and O&M contractor, USP&E handles engineering, installation, commissioning, and long-term operations across all dual fuel deployments. Click Fast Quote for a response within hours.
No generators found. Try resetting filters.
When Dual Fuel Makes Sense for Your Project
Dual fuel generators are commonly deployed where fuel availability is uncertain, where gas supply is under development, or where a plant needs to hedge against price volatility in one fuel market. Typical use cases include LNG-to-power projects where HFO serves as the backup fuel during gas supply interruptions, mining sites transitioning from diesel to gas as pipelines arrive, marine auxiliary power, and utility plants serving regions with seasonal fuel availability.
Fully Documented Used Dual Fuel Inventory with LTSA Options
Every used dual fuel unit in our inventory is documented with full service histories, borescope reports, and available inspection support. Optional long-term service agreements are available under our O&M division, with service scope including scheduled maintenance, major overhauls, parts supply, and remote monitoring across multi-year terms.
Frequently Asked Questions
What is a dual fuel generator and when is it used?
A dual fuel generator is an engine-driven genset capable of running on two fuels within the same unit, most commonly heavy fuel oil or diesel combined with natural gas. Dual fuel units are used where fuel supply or pricing is uncertain, on LNG-to-power projects requiring backup fuel, on marine auxiliary plants, and in mining operations transitioning from diesel to gas. USP&E stocks Wartsila 32DF and 50DF, MAN 35/44DF, and Hyundai HiMSEN H32/40DF dual fuel sets.
Can dual fuel generators switch between fuels while running?
Modern dual fuel engines from Wartsila, MAN, and Hyundai HiMSEN can switch between gas and liquid fuel modes while the engine is running and under load, with typical transfer times of 10 to 60 seconds depending on engine model and control configuration. This capability is particularly valuable for LNG-to-power operators who need to maintain continuous power generation during gas supply interruptions, and for island grids where fuel availability can vary seasonally.