On the Dash:
- BYD’s HaoHan system offers up to 14.5 MWh, nearly three times Tesla’s Megapack 3.
- It cuts system failures and maintenance costs by 70% and lowers project costs over 20%.
- Advanced inverters and energy management optimize large-scale deployments.
BYD has launched a new stationary energy storage system, HaoHan, designed to compete with Tesla’s recently unveiled Megapack 3. The system boasts significantly higher capacity than Tesla’s containerized solution, with a standard configuration delivering 14.5 MWh—nearly three times Tesla’s 5 MWh Megapack 3. A 20-foot container version offers 10 MWh of energy storage.
The HaoHan system leverages BYD’s proprietary 2,710 Ah Blade Battery cell, the largest used in stationary storage. The company reports a cell-to-system volume ratio of 52.1%, claiming it is the highest in the world.
The design simplifies operations while improving reliability, reducing system failures and maintenance costs by roughly 70%. BYD also says the system allows for the deployment of gigawatt-hour projects using about half the number of battery units, potentially lowering overall energy project costs by more than 20%.
To complement HaoHan, BYD introduced new power electronics, including the GC Flux grid-forming inverter. Scalable from 2.5 to 10 MW, the inverter delivers around 38% higher performance than the industry average and achieves a peak power density of 1,474 kW per square meter, roughly 130% above typical market values. It supports overloads of up to three times rated output for short periods and reaches maximum efficiency of 99.35%.
The GC Flux PCS features advanced grid-forming capabilities, enabling real-time voltage and frequency regulation. It provides active inertia response for up to 25 seconds, ultra-fast voltage and frequency adjustments within 100 milliseconds, and wide-band damping across the 1–1,500 Hz range. These features help maintain grid stability, particularly for hybrid or renewable-heavy grids requiring smooth transitions between grid-connected and islanded operations.
BYD also unveiled a new energy management system, GC Master EMS, designed to optimize the capacity and performance of large-scale storage deployments, positioning it as a competitor to Tesla’s Autobidder platform.
