Tesla founder Elon Musk believes he can rebuild Puerto Rico's power grid. Tesla CEO Elon Musk speaks during a news conference at the Adelaide Oval in Adelaide, Australia on July 7, 2017. Tesla will partner with French renewable energy developer Neoen to build the world's biggest Lithium IIon Battery, a 100MW battery that will be built in James Town, the South Australian government announced on the day. SAN FRANCISCO -- Elon Musk has so many irons in the fire, you can't see the fire. The Tesla and SpaceX CEO tweeted Friday that he is delaying the unveiling of a self-driving truck in order to focus his attention on smoothing out Model 3 production issues and helping devastated Puerto Rico switch over to solar power.