Musk’s company continues to make great strides in power matters, and his latest feat is producing renewable energy for less per kilowatt an hour than fossil fuel power stations on the island of Kauai. Basically, the setup uses Powerpacks to grab energy in the day and reserve it for nighttime, when—duh—there isn’t any sunlight to exploit. Hawaii intends to be completely powered by renewable energy sources by 2045. …once the sun goes down solar panels become pretty useless. But Tesla and Hawaii have a solution that'll use the sun's rays both day and night using Powerpacks built at the Gigafactory. The Kapaia project is a combination 13MW SolarCity solar farm and 53MWh Tesla Powerpack station on the island of Kauai. In partnership with the KIUC (Kauai Island Utility Cooperative) the project will store the sun's energy during the day and release it at night. The station (along with Kauai's other renewable resource solutions including wind and biomass) won't completely keep the island from using fossil fuels but it will temper the need.