The UK's largest locomotives built in the UK since 2003 (a fleet of 90 tonne, battery hybrid Bo-Bo locomotives for Tata Steel, Port Talbot) Power is delivered by the traction battery and 416 kW maintenance free, high torque electric motors. The locomotive is self-contained, with on-board battery charging from a low emission, EU Stage V compliant Diesel engine. The locomotive design offers high torque, high haulage capability with over 300 kN tractive effort, delivering the 2,500 tonne loads safely across the Port Talbot works, operating on their maximum gradient of 1;60 (1.7%) and an Abt rack and pinion battery hybrid locomotives for use on Snowdon Mountain Railway. The 800mm gauge hybrid locomotives driven by high torque, maintenance free electric motors, powered by both traction battery and Diesel generator. On descent from the summit the Diesel generator will be switched off whilst service braking recharges the battery ready for the locomotives next accent. The locomotive allows for added passenger capacity. An extra 12 passengers per train, allowing Snowdon Mountain Railway to extend their existing service.