High Quality Content by WIKIPEDIA articles! The Railpower GG20B Green Goat is a low-emissions diesel hybrid switcher locomotive built by Railpower Technologies Corp. It is powered by a single Caterpillar C9 I6 engine developing 300 horsepower (224 kW), which is also connected to a large battery bank where both sources combine for a total power output of 2,000 horsepower (1,490 kW). To date, there have been more than 50 GG20B diesel hybrid genset switchers manufactured since their first introduction in 2004. BNSF Railway and Vehicle Projects converted a GG20B to an experimental testbed, for the use of hydrogen fuel cells. The new locomotive is designated HH20B. This locomotive was publicly demonstrated for the first time on June 29, 2009, at Topeka, Kansas.

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