On November 17, Tesla announced that its Powerwall energy storage system has installed more than 250,000 sets worldwide. The second-generation Powerwall product uses 21700 batteries with a battery capacity of 13.5 kWh.

　　In May 2020, Tesla's global installation of Powerwall was 100,000, which increased to 250,000 after one and a half years, indicating that its home energy storage business has grown rapidly. In the past 12 months, Tesla has deployed more than 4GWh of energy storage capacity (including Powerwall, Powerpacks and Megapack).

　　Tesla said that due to the continuous growth of Powerwall market demand and the priority supply of lithium battery capacity for electric vehicles, its energy storage product order backlog is serious. Insufficient lithium battery capacity is the biggest factor restricting the growth of its energy storage system shipments. It is expected that its Powerwall sales will continue to grow at a rate of about 100,000 sets per year in the future, and it is currently trying to increase production capacity.

　　In addition to the increase in sales of home energy storage products Powerwall, its grid-level battery energy storage system Megapack is also in short supply. Megapack is currently one of the largest energy storage systems on the market, each unit can store up to 3MWh.

　　In this year's Q2 earnings conference call, Musk revealed that Megapack's production capacity has been sold out before the end of 2022. In the third quarterly report, Tesla mentioned that it will build a new Megapack energy storage plant with a capacity of 40GWh.

　　Since 2020, Tesla has won a number of Megapack energy storage orders worldwide, and recently won an order from Australian clean energy producer Tag Energy to build two 50MW energy storage projects for the latter in the UK Supply Megapack system. Last month, Tesla also signed a Megapack system supply agreement with a capacity of 2GW/6GWh with the American renewable energy company Arevon.

　　It is worth noting that in July this year, the 300MW/450MWh Victoria Energy Storage Power Station in Australia caught fire during the test period. The energy storage project used 210 Tesla Megapacks with an energy storage capacity of 450MWh.

　　At present, Tesla's energy storage system mainly uses 21700 ternary batteries produced by LG Energy, Panasonic, and Samsung SDI, but Tesla did not disclose which supplier the Megapacks batteries that caught the fire came from. However, LG Energy’s energy storage system has had more than 20 fire accidents around the world due to the risk of heat and fire in its batteries.

　　Under this circumstance, in order to increase the energy storage battery capacity supply and further improve the safety of the energy storage system, Tesla has decided to use lithium iron phosphate batteries in its Megapack system, and said that it will increasingly tend to use iron phosphate Lithium batteries are used in energy storage products.

　　In August of this year, Tesla reached a cooperation with Japanese electric power company Global Engineering and engineering firm Ene-Vision to build a battery energy storage project with a total capacity of 6095kWh in Hokkaido. Tesla provided the Megapack system for the project. The energy storage battery comes from the CATL, which means that the CATL has entered Tesla's energy storage supply chain and is expected to supply lithium iron phosphate battery products for its energy storage system.

　　As Tesla's sales of energy storage products continue to grow, its market demand for energy storage batteries will continue to increase, which in turn will drive the further growth of the global energy storage battery market.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect substitute for lead-acid batteries, and are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　Solar power generation system with lithium battery energy storage system is a very promising clean energy.