Outside the farming town of Delta, Utah, two companies are planning one of the world’s largest renewable energy storage hubs, with $504 million in backing from the U.S. Department of Energy (DOE).The federal government support was in the form of a loan. The idea behind the Advanced Clean Energy Storage (ACES) project — a joint venture between Mitsubishi Power Americas and Magnum Development — is to harness enough on-demand renewable energy to power around 350,000 west coast homes nonsto