Tesla Megapack on X: "Last Tuesday night, battery storage became the largest source of supply to the California grid for the first time, discharging over 6GW https://t.co/SomgrRqORS" / X— Tesla Megapack (@Tesla_Megapack)#Battery#Energy#USA#California#InfrastructureTesla Megapack on X: "Last Tuesday night, battery storage became the largest source of supply to the California grid for the first time, discharging over 6GW https://t.co/SomgrRqORS" / X