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Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch... by kalleboo on Saturday April 19, 2025 @03:26AM (#43734828)
An example of such a line is in Sweden https://en.wikipedia.org/wiki/Iron_Ore_Line

> From Riksgränsen on the national border to the Port of Narvik, the trains use only a fifth of the power they regenerate. The regenerated energy is sufficient to power the empty trains back up to the national border.

Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch... by rstuart4133 on Saturday April 19, 2025 @03:40AM (#43734873)
Similar thing happens in Australia: https://www.jalopnik.com/these-electric-trains-never-need-re...

The twist: these trains aren't connected to the grid. They use regenerative braking to charge batteries when carting ore to the coast, and the batteries power the trip back to the mine.

Re:Hydrogen vs. Battery Buses: A European Transit Reality Ch... by masklinn on Saturday April 19, 2025 @09:42AM (#43736340)
IIRC there are mine trucks set up similarly in some locations, they're loaded at the top, regen downhill, and that's sufficient to power them back up the hill when empty.