Image from National Geographic
Around the United States battery backups are being installed at strategic points on the power network. These power packs are in testing the testing stage of a plan to provide back up power in case of power shutdowns .
The packs will also be used to store over produced energy where the power companies are producing to much energy.and will be use at peak demand instead of firing up coal powered station thus reducing the impact on the environment.
Read more National Geograpfic The Guardian