BYD has introduced its next-generation energy storage system, Haohan, as the Chinese automaker and battery maker steps up competition with rivals in the large-scale energy storage sector.
Unveiled on Sept. 18, the Haohan system’s smallest unit reaches 14.5 megawatt-hours (MWh), which BYD says is the highest globally. The solution delivers up to 10 MWh of storage capacity within the footprint of a 20-foot container. For comparison, Contemporary Amperex Technology (CATL) launched its Tener Stack in May with 9 MWh capacity, while Tesla’s Megapack 3 has a unit capacity of 5 MWh.
Haohan uses BYD’s dedicated blade batteries with a maximum capacity of 2,710 ampere-hours (Ah), more than three times that of conventional storage batteries. It achieves a cell-to-system volume ratio of 52.1%, which the company described as the world’s highest. The design reduces the number of enclosures, cuts space requirements, and simplifies system management.
The new system is equipped with IP66-rated protection, extending the lifespan of dust-sensitive components, lowering system failure rates, and reducing maintenance costs. It is aimed at supporting terawatt-hour (TWh) scale power plants and accelerating upgrades to power grids.
BYD has been expanding rapidly in energy storage. The company’s installed capacity of power and storage batteries reached about 23.2 gigawatt-hours (GWh) in August, up 23% year-on-year and 3.7% month-on-month. From January to August, cumulative installed capacity stood at 180.1 GWh, an increase of nearly 67% from a year earlier.