HeraldNet, Nov. 2, 2016, by Dan Catchpole.
http://www.heraldnet.com/news/pud-invests-in-11-2-million-in-energy-storing-units/

"Don’t be deceived: They look like shipping containers. But the rows of massive metal boxes could contain the utility industry’s future. At least, that’s the hope of officials at the Snohomish County Public Utility District, which is installing a huge battery system near downtown Everett. The district’s goal for the $11.2 million project is to make energy storage cheaper and more flexible for utilities."