The chairmen of China’s battery and solar giants have called for more top-down regulations to rein in cutthroat competition, warning that unchecked overcapacity is squeezing profits and threatening the industry’s stability.Despite tailwinds including the Middle East conflict that could increase demand for renewable products, overcapacity remains a major challenge for industry players.Zhang Tianren, chairman of Tianneng Holding Group – ranked second behind Contemporary Amperex Technology Ltd (CATL) in a 2025 list of global top 500 new energy firms compiled by the state-backed China Institute of Energy Economics – urged authorities to tighten approvals for new projects.Advertisement“Policies should not only guide…