A man hikes through an abandoned town to an industrial building. He sweats and slightly injures himself doing several tasks by hand that normally would require a forklift. He throws a switch and watches in accomplishment/marvel as the town has electricity again for 80+ seconds. This may be a personal best. Then he hikes away again.

What short story am I thinking of?

Known incorrect guesses:

• Walter Miller - A Canticle For Leibowitz
• Ray Bradbury - Powerhouse

A man hikes through an abandoned town to an industrial building. He sweats and slightly injures himself doing several tasks by hand that normally would require a forklift. He throws a switch and watches in accomplishment/marvel as the town has electricity again for 80+ seconds. This may be a personal best. Then he hikes away again.

The title of this short story is on the tip of my brain and it's really bugging me. What is it?

Known incorrect guesses:

• Walter Miller - A Canticle For Leibowitz
• Ray Bradbury - Powerhouse