« …y time a train rumbles to a stop, the energy generated by all that friction is converted to electricity, which is fed through inverters and distributed throughout the subway system. 1/3 of that powers the trains; the rest provides juice to station amenities & a growing network of EV chargers. … »

Barcelona is turning subway trains into power stations

Most of the passengers emerging from the station in Bellvitge, a working-class neighborhood outside Barcelona, have no idea just how innovative the city’s subway system is.