Tongwei, GS-Solar, and Golden Solar signed a strategic cooperation agreement on March 18, 2026, to develop a large-scale manufacturing facility for hybrid heterojunction back-contact (HBC) solar cells. Tongwei Solar will contribute manufacturing capacity, production facilities, supply chain resources, and operational management. GS-Solar will provide its hybrid HBC cell design, GW-scale integrated equipment, and mass-production process solutions, while Golden Solar will offer patents, commissioning experience, and process support. The partners aim to collaborate across the full value chain, including technology development, manufacturing, and process optimization, to accelerate industrial deployment of this advanced solar cell technology.