I remember reading this article a few years ago that Goldman Sachs. It's paywalled but the basics was that GS stores energy during the night, and uses the ener

I remember reading this article a few years ago that Goldman Sachs. It's paywalled but the basics was that GS stores energy during the night, and uses the energy during the day. I thought it was neat, but they're obviously not new to this concept. https://www.bloomberg.com/news/articles/2014-08-01/goldman-s-icy-arbitrage-draws-interest-to-meet-epa-rule https://www.bloomberg.com/news/articles/2014-08-01/goldman-s...