Coal-powered electricity comes to an end in Hawaii as the Tesla Megapack battery energy storage system kicks in A beautiful aerial view of the under construction Tesla Megapack battery energy storage system project in Hawaii as the last coal shipment is delivered to Hawaiian Electric. Credit: Courtesy of Tesla, Inc. via Elon Musk / Twitter. Post author By Iqtidar Ali Post date September 29, 2022 Tags Hawaii, Sustainability, Tesla Megapack, United States