The SW1200 diesel shunting locomotive, put into production in January 1954, boasts a powerful 1,200 horsepower output from its 12-cylinder engine. This strong performance not only makes it suitable for shunting operations but also enables it to undertake light freight tasks. The optional Multiple Unit (MU) function further enhances its freight capacity, becoming a core advantage at that time.
Now, this classic locomotive has undergone a "major modification" upgrade – it is refitted with nickel-manganese-cobalt batteries to transform into a battery-powered shunting locomotive. Although the range has not been disclosed yet, the upgraded locomotive features notable performance highlights: it can pull 50 vehicles and operate stably in low-temperature environments below -40°C. The total cost of this modification project is approximately 4 million Canadian dollars (equivalent to 2.9 million US dollars), with the Government of Alberta providing a grant of 2 million Canadian dollars (equivalent to 1.4 million US dollars). It is reported that this "revitalized" battery-powered shunting locomotive is scheduled to enter commercial operation in 2026.