I was just standing in an elevator with a sign that said: Send back to 0 after use to save energy. How would sending an elevator back to 0 without any people in it ever be more energy efficient?

Question

I was just standing in an elevator with a sign that said: Send back to 0 after use to save energy. How would sending an elevator back to 0 without any people in it ever be more energy efficient?

In: Other

Answer 1

I have no idea if it would work like that but my guess: They generate electricity from the elevater when it descends (because of gravity) and then store it to power the motors when the elevater has to go up again.