Tesla’s Shanghai Megafactory has reached a major milestone, as the 1,000th Megapack unit rolled off the production line this week. The 1,000th Megapack is set to be shipped to Europe, and highlights Tesla’s rapid production ramp in China.
Construction of the Megafactory started on May 23, 2024, making it Tesla’s first energy storage project outside the United States. As with Tesla’s Gigfactory, which went from a mud pit to operational factory in less than a year, the Megafactory followed the same pattern, officially starting production just 9 months after construction first started, on February 11, 2025.
Just as quick as the pace of construction, Tesla is wasting no time ramping production. According to an announcement on Tesla’s Weibo account in China, the 1,000th Megapack was produced this week. This particular Megapack will be shipped to Europe.
Remarkably, it took the facility less than six months to reach this 1,000-unit milestone, indicating an average production rate of more than 188 units per month over that time span. However, current production rates are likely significantly higher than at the beginning as manufacturing lines typically undergo a ramp-up period, where processes, staffing, and equipment efficiency improve over time to reach full-scale output.
That ramping process is still underway. The Shanghai Megafactory is expected to produce up to 10,000 Megapacks annually, representing nearly 40 GWh of energy storage capacity—enough to power 50,000 households in Shanghai for a year. At current rates, the Megafactory is producing around 2,000 units on an annualized basis.
Tesla’s Megapack is a large-scale commercial energy storage solution designed to stabilize power grids, store renewable energy, and prevent outages. Each Megapack can store approximately 3,900 kWh of electricity—roughly the equivalent of the battery capacity of 62 Tesla Model 3 Rear-Wheel Drive (RWD) vehicles.
Tesla has one other Megafactory in the U.S. in Lathrop, California, also with a production capacity of 10,000 Megapacks annually. Tesla is also currently building out another Megafactory in Waller County, Texas, its third global Megapack plant.
