BYD Enters Japan BESS Market With Haohan Solution

BYD has launched its battery energy storage system (BESS), named Haohan, in Japan, marking a key step in its global storage strategy.

The Haohan battery boxes are manufactured in Zhejiang, China, and exported to Japanese developers. Delivery occurs within six months of order; pricing varies by scale and is not publicly disclosed. The identities of the first Japanese customers remain undisclosed.

Haohan is the next-generation storage system unveiled by BYD in September last year. It features the world’s largest 2710Ah blade batteries, offering over 300% higher capacity than conventional storage cells.

The system’s smallest unit holds 14.5MWh. A 20-foot equivalent container can accommodate 10MWh, with a Vcts of 52.1%, 39.7% above industry averages.

High-density integration delivers practical advantages—constructing a 1GWh storage site requires only 69 units versus 145 traditional containers, reducing footprint by 33%.

BYD’s Cao Hu, head of Energy Storage and New Battery Division, said the system follows a “big but simple” design philosophy, using fewer boxes, smaller footprint, and simplified management to enhance integration.

Japan plans to raise renewable energy to 36%-38% by 2030. Solar and wind fluctuations demand storage support, making Haohan a strategic fit for the market.

BYD shipped over 60GWh of BESS in 2025, capturing 13% of the global market and ending Tesla’s two-year leadership.

Tesla followed with 46.7GWh (10%), Sungrow at 9%; together, the top three firms account for about one-third of global capacity.

By end-2025, BYD had shipped over 135GWh of storage systems and completed more than 650 large-scale projects across 110 countries. Notable projects include 12.5GWh grid storage with Saudi Power and 2.6GWh solar-plus-storage in Chile’s central oasis.

BYD’s growing presence in Japan supports its energy business. From January to April 2026, BYD sold 1,486 passenger vehicles in Japan, up 92.7% YoY, and operates over 70 local sales points, laying the foundation for Haohan deployment.