Tesla announces bigger Megapack for stationary storage

Artist's rendering of Tesla Megapack grid storage installation with wind farmLast week, Tesla introduced something bigger than its Powerpack energy-storage systems: the Megapack, for large utility-scale storage installations.. Tesla says the Megapack, which stores 3 megawatt-hours of electricity, has 60 percent more energy density than the Powerpack. For grid power installations, that means companies can install fewer than...