China's Battery Output Surges 55% as Round-the-Clock Solar Storage Projects Reshape Global Supply Chains

China's Battery Output Surges 55% as Round-the-Clock Solar Storage Projects Reshape Global Supply Chains Chinese battery production growth collides with grid connection bottlenecks and EU security concerns, testing how fast storage can scale worldwide. Adani Green Energy commissioned a 3.37 GWh battery energy storage system at Khavda in Gujarat, the largest single-location BESS deployment outside China. The facility is part of a growing class of "round-the-clock" solar-plus-storage projects that pair gigawatt-scale photovoltaic generation with battery capacity sufficient to deliver power after sundown. Chinese manufacturers are increasingly prominent in the supply chain for these mega-projects, raising questions about both scalability and strategic dependence.⁸ That matters because the economics of dispatchable renewable power depend entirely on battery costs and availability. China's battery output rose 55.6 percent year-on-year in April, supported by energy storage demand and exports, according to Centre for Research on Energy and Clean Air data. The pace of Chinese manufacturing expansion is setting the global price floor for storage, but it is also deepening the supply chain concentration that policymakers in Europe and the United States are now treating as a security risk.² US battery storage firms are seeing surging interest from power-hungry AI data centres, Reuters reported, but lengthy queues to connect to the grid and a supply chain heavily dependent on China are hampering the industry's ability to scale rapidly. The bottleneck is not demand or capital. It is physical infrastructure and permitting.⁵ The supply side tells a similar story. Although developers are rushing to bring more battery projects online, high battery pack prices, global shipping bottlenecks and other supply chain constraints are dampening near-term deployments, panellists at the BloombergNEF Summit in New York said. Utilities want more storage. They cannot get it fast enough.⁶ China's own power system illustrates why storage matters. Total power generation rose an estimated 6.6 percent year-on-year in April, but weak wind conditions, subdued solar performance and extended nuclear refuelling outages pushed coal power higher for the fourth consecutive month. Thermal power commissioning in the first quarter surged more than 160 percent year-on-year, reaching a record high. Solar capacity additions fell 31 percent from the prior year's elevated base. Wind additions rose 8 percent. The pattern is clear: when intermittent sources underperform, coal fills the gap unless storage is available at scale.² The Strait of Hormuz disruption is compounding the pressure. In April, crude oil and natural gas imports into China fell approximately 20 percent and 13 percent year-on-year respectively as shipping disruptions weighed on energy flows. Solar cell production dropped 25.6 percent, reflecting weaker domestic installations and a pullback following earlier export surges. The fossil fuel crunch is testing China's energy system at the same moment its clean energy manufacturing is recalibrating.² India is emerging as a major deployment market. Adani Green Energy, with nearly 5 GW of solar generation capacity, is on par with Italy's Enel Green as the world's leading solar developer. The group's founder Gautam Adani has said his companies will spend $70 billion on green energy in India by 2030. Singapore has conditionally awarded imports of up to 3.4 GW of firmed solar from Indonesia, signalling that round-the-clock renewable supply is becoming a tradeable cross-border commodity in Asia.^4,7 China's Belt and Road green energy investments reached $11.8 billion in 2024, 60 percent more than in 2023, according to researchers at Griffith University and Fudan University. Pakistan's rooftop solar market has been transformed by Chinese equipment, demonstrating how quickly deployment can scale when hardware costs drop. But the same supply chain dominance that enables cheap deployment also creates the vulnerability that European policymakers are now flagging.³ At the Solar 2026 seminar in Helsinki, an analyst warned that Europe's reliance on Chinese solar components leaves the continent open to sabotage of its energy system. The concern extends to battery storage: if the same manufacturers dominating panel and inverter supply also control BESS production, the strategic exposure compounds.¹ The tension will intensify as round-the-clock solar storage projects scale globally. Watch for US tariff decisions on Chinese battery cells and whether India's domestic manufacturing push under Adani and others can create an alternative supply base. If Chinese battery output continues growing at 55 percent annually while Western grid connection queues stretch to years, the bottleneck shifts from manufacturing to infrastructure, and the projects that can secure both hardware and grid access first will define the next generation of dispatchable power.^5,2