Rail
OptiFuel Locomotives
Switcher | Road Switch | Line Haul
Built for Efficiency. Engineered for Profit.
Diesel-Hybrid | Dual Fuel Hybrid | CNG/RNG Hybrid | Battery-Electric
Up to 65% Lower Operating Costs
Swap Power. Keep Moving.
Interchangeable Power Modules – Flexible & Future-Ready
Cost Savings
Reduce fuel costs up to 65% and enjoy lower lifetime maintenance expenses.
TRANSCONTINENTAL RANGE
Capable of traveling from LA to Chicago with only a single fuel stop – no tender required.
NO COMPROMISE
Experience the highest efficiency rating of any freight locomotive – delivering high power and ultra-low emissions without trade-offs.
New & Retrofit Options
Buy new or retrofit any existing switcher or line haul locomotive platform with minimal infrastructure expansion.
Superior Performance
Built for 24/7 use and 30-year life.
Unmatched Reliability
95% uptime and full tractive effort even if an engine fails, plus 1-hour on-track engine module replacement.
Future-Proof
Modular engineering allows easy updates as new technologies emerge, helping railroads stay adaptable without high re-investment costs.
Flexible Fueling
Operate on 100% diesel or blends with up to 35% on all dual-fuel models.
Need grant support? OptiFuel Systems actively supports railroads by providing comprehensive grant support assistance, guiding them in identifying relevant grants and facilitating the preparation of grant applications through a collaborative process. Click here to learn more.
Now Taking Orders
OptiFuel Freight Locomotives
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Up to 65% Operational Cost Savings in Fuel, Labor & Maintenance
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Quick-Disconnect (QD) Technology – Swap Modules in ~1 Hour
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Built-In Autonomy
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FRA Concurrence – Advance Capabilities. Standard.
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Multi-Fuel Integrated Refueling Station – Diesel, CNG/RNG and EV Charging
45’ Tier 5, 4-Axle, DC Hybrid Switcher
- Continuous Power: (8-10 hours): 200 kw (260 hp)
- Peak Power (1 hr): 1750 kW (2300 hp)
- 2.5 MWh LFP Hybrid Batteries
- Advanced DC Traction
- 1 Hour Rapid Recharge
- Recharge Rate: 960 kW MCS
MSRP: $1.92 to $2.59 Million
55’ Tier 5, 4-Axle, DC Hybrid Switcher
- Integrated LFP Hybrid Battery: 0.5 MWhr
- Advanced DC Traction (B-B)
- Ultra-low emissions: 0.2 g/bhp-hr NOx;<0.01 g/bhp-hr PM
- Up to 65% Lower Operating Costs
- Dual Fuel Series Advantages:
- Net-Zero GHG Emissions
- RNG fuel supply guaranteed below diesel prices
- Minimal infrastructure expansion required
MSRP: $2.24 to $2.92 Million
65' Tier 5 4-Axle DC Hybrid Switcher
- Integrated LFP Hybrid Battery: 1 MWhr
- Advanced DC Traction (B-B)
- Ultra-low emissions: 0.2 g/bhp-hr NOx;<0.01 g/bhp-hr PM
- Up to 65% Lower Operating Costs
- Dual Fuel Series Advantages:
- Net-Zero GHG Emissions
- RNG fuel supply guaranteed below diesel prices
- Minimal infrastructure expansion required
- MSRP $3 to $4.34 Million
65' Tier 5 6-Axle DC Hybrid Switcher
- Integrated LFP Hybrid Battery: 1 MWhr
- Advanced DC Traction (B-B)
- Ultra-low emissions: 0.2 g/bhp-hr NOx;<0.01 g/bhp-hr PM
- Up to 65% Lower Operating Costs
- Dual Fuel Series Advantages:
- Net-Zero GHG Emissions
- RNG fuel supply guaranteed below diesel prices
- Minimal infrastructure expansion required
MSRP: $3.15 to $4.59 Million
75' Tier 5 6-Axle AC Hybrid Line Haul
- Integrated LFP Hybrid Battery: 0.5 MWhr
- Advanced AC Traction
- Ultra-low emissions: 0.2 g/bhp-hr NOx;<0.01 g/bhp-hr PM
- Up to 65% Lower Operating Costs
- Dual Fuel Series Advantages:
- Net-Zero GHG Emissions
- RNG fuel supply guaranteed below diesel prices
- Minimal infrastructure expansion required
MSRP: $4.89 to $6.11 Million
Break out of the Low-Margin Cycle
Diesel-Natural Gas Dual Fuel Hybrid Line Haul Locomotives
Slash fuel costs, boost margins, and lead the industry in next-generation line haul efficiency – proven for performance and shareholder value.
Secure your demonstration commitment now for one-million-mile testing in 2027.
- 80′ (5500 hp) or 72′ (4600 hp)
- AC traction system with regenerative braking
- Repowered options available
Rapid recharge in ~1 hour to support continuous yard operations
Turnkey CNG/RNG infrastructure (mobile or pipeline-connected)
Over 95% availability, engineered for continuous service
Advanced DC and AC traction systems with regenerative braking maintains tractive performance across duty cycles
Trackside module exchange in ~1 hour using standard lifting equipment, enabling rapid maintenance, repair, and upgrade without removing the locomotive from service
5-year standard warranty with optional extended coverage
Designed for 30-year service life with modular upgrade pathways5-year standard warranty with optional extended coverage
Exceeds proposed Tier 5 criteria emissions: 0.2 g/bhp-hr NOx, <0.01 g/bhp-hr PM1-hour engine module replacement, minimizing disruptions and out-of-order assets.
Enabled by significantly lower fuel consumption and optimized duty cycles, OptiFuel Gen 3 locomotives reduce – or in some configurations, eliminate – emissions
Future-ready platform supports power, fuel, and technology upgrades without full locomotive replacement
Configurable for extended range operations, including line haul service up to 2,000 to 2,500 miles without refueling
Turnkey Refueling
Each OptiFuel Freight Locomotive comes paired with a comprehensive refueling solution.
OptiFuel’s turnkey multi-fuel integrated refueling stations offer diesel, CNG/RNG and EV Charging. Modular refueling infrastructure for seamless integration of all fuels.
Modular & Scalable Design
OptiFuel’s novel modularity makes customization, future transitions, and on-rail maintenance possible.
With 90% component modularity, modules can be quickly swapped out for upgrades or transferred between locomotives.
Performance
Reliability
Multi-engine engineering keeps locomotives running even with an engine down.
Flexibility
Affordability
Leading the Charge
The only supplier 100% focused on zero emission switcher and line haul locomotives, OptiFuel has been advancing alternative fuel technology in locomotives since 2013.
Proven Experience
OptiFuel is the only company to develop and install a CNG refueling station for rail and the first company to obtain FRA concurrence with CNG storage onboard a freight locomotive. Learn more ›
Setting the Pace of Innovation
OptiFuel’s 5000 hp Diesel-RNG Dual Fuel Hybrid line haul locomotive, set to undergo testing at TTC from 2025 to 2026, is aiming for FRA concurrence by 2027.
The Recognized Leader
Two recent CRISI awards worth $26,155,673 will support full FRA concurrence of our zero emission Diesel-RNG Dual Fuel Hybrid Switcher and Line Haul Locomotives by 2026 and 2027. Read more ›
OptiFuel is committed to rail for the long haul.
Locomotives have a 30+ year life and the most stringent performance demands of all industrial equipment. Trains haul as many as 150 cars long distances and up steep terrain — making both torque and horsepower paramount. Equipment that can meet these performance requirements is both rare and coveted.
OptiFuel’s innovative modular power system not only meets these stringent performance demands but also empowers railroads to seamlessly integrate advanced technologies, ensuring long-term reliability, adaptability, and cost-effectiveness in their operations.
The power of world-class partnerships.
Our partnerships provide customers with the most advanced and reliable technology in the world, with the assurance of long-term support, manufacturing scale, and efficient cost.
Markets We Serve:
Rail
Power Generation
Semi-Trucks
Marine
