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Modular switcher and line haul locomotives from 1000hp to 5500hp, configurable to your duty cycle and tractive effort requirements. All models are hybrid by design, with integrated 0.5-1 MWh battery systems for optimized efficiency. Each features regenerative braking and plug-in hybrid operation, with rapid-recharge capability and dual-side power ports. Dual fuel versions run on diesel and RNG or CNG, achieving net-zero GHG emissions with just 30% RNG. OptiFuel also offers RNG fuel supply and turnkey infrastructure - systems that integrate alongside existing diesel refueling, allowing concurrent fueling with minimal site modification. Power options include diesel-hybrid, diesel-RNG dual fuel hybrid, battery-electric, and hydrogen. OptiFuel locomotives are built and tested for a 30+ year service life and come standard with a 5-year warranty.