“Tesla just built what Electrek claims is Asia’s largest energy storage system at Osaka’s extremely busy train station in Japan — in just two days. Rather than providing households cheaper and reliable power, it’s designed to make sure trains at the station don’t get stuck and help reduce energy demand on the Osaka grid during peak hours.

“In the event of a grid outage, this Osaka Powerpack installation is designed to provide emergency backup power to safely move a train and its passengers to the nearest station,” Tesla wrote in a tweet…”