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What is the function of solar panels on train cars?

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Since there is no picture attached I can't answer directly for the one you saw but do know one use of solar panels on rail cars. A solar panel power can power a GPS devices and a cell phone and/or other instruments to monitor the rail car. read more

A solar panel power can power a GPS devices and a cell phone and/or other instruments to monitor the rail car. With a solar panel the GPS/cell device does not to have a big battery which have a life of about 5 years depending on how many alerts or calls the device makes. read more

A couple of years ago I saw a string of brand new UP ballast cars sitting on a siding in New Castle, PA. It seemed to me that the solar panels powered the cars operation. A discussion on another forum seemed to indicate that as well. read more

Those are ballast cars Hertzog runs in dedicated trains. The panels charge batteries to run the communication equipment and the discharge doors. The train is remotely controlled by an operator in a caboose or trailing engine to deposit a specific amount of ballast along the route being worked. read more

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