Global Storage Forecasts Strengthen China’s Battery Opportunity but Raise Localization Risk

On May 29, Sina Finance republished a BloombergNEF summary of its Energy Storage Market Outlook 1H 2026. The summary said global energy-storage additions excluding pumped hydro reached 112 GW / 307 GWh in 2025, up 48% by power capacity from 2024. China and the United States remained the two largest markets, together accounting for 70% of annual additions. BNEF forecast that 2026 additions would rise to 158 GW / 459 GWh, up 41%, and that cumulative capacity would reach 2,867 GW / 10,514 GWh by the end of 2036.

These numbers confirm that storage has moved from a supporting technology to the core flexibility asset of the power transition. Solar and wind growth creates value only if electricity can be shifted, stabilized and delivered when needed. As more countries use co-location requirements, tenders and power-market reforms to accelerate deployment, storage becomes the operating bridge between renewable capacity and reliable power. That is exactly where Chinese manufacturers and system integrators have built scale advantages.

But the outlook also highlights a strategic constraint: localization. The BNEF summary said many markets are advancing local-content policies. The United States leads by requiring projects to source battery components outside China to qualify for tax credits, while the EU, Japan and South Korea have implemented or are considering similar requirements in tenders. Brazil offers preferential financing for projects using localized components. For Chinese firms, global demand is rising at the same time as market access becomes more conditional.

This changes the ESG and investment lens. A storage company can no longer be evaluated only on shipments and battery cost. It needs manufacturing footprints, supply-chain due diligence, safety certifications, project-finance credibility, fire-risk controls, recycling planning and local compliance capacity. In markets where storage assets support public grids, failures are not private product defects. They are infrastructure events. That raises the standard for governance and after-sales responsibility.

The technology mix is also becoming less static. The BNEF summary said lithium iron phosphate batteries will continue to dominate market share until 2035 as US and Korean manufacturers reduce nickel-based battery production, but that LFP’s share will gradually decline over the next decade as alternative chemistries are adopted. It also noted growing attention to sodium-ion batteries as suppliers sign contracts, alongside non-lithium long-duration technologies. Chinese firms have advantages in LFP and are active in sodium-ion, but technology leadership will need to be renewed rather than assumed.

The duration signal is important. In 2025, large-scale projects accounted for 85% of new capacity, mainly for energy shifting, and short-duration storage below six hours represented 79% of energy-shifting capacity. BNEF expects that share to fall from 2026 and to decline to 57% by 2036 as long-duration technologies grow. If markets need eight-to-ten-hour or seasonal flexibility, standard lithium projects may face different economics and competition. Chinese companies that can integrate multiple technologies and revenue models will be better positioned.

For China ESG, the opportunity remains large. A world adding hundreds of GWh each year needs low-cost manufacturing, engineering capability and deployment speed. Chinese firms can supply that. But the risk is that overseas expansion becomes a margin trap if companies chase volume without pricing localization costs, warranty obligations, safety risk and political barriers. A large GWh order is not automatically a high-quality ESG outcome if it creates hidden fire, recycling, labor or stranded-asset risk.

The takeaway is constructive but disciplined. Storage is one of the strongest global demand stories in the energy transition, and China is central to it. Yet the winners will not simply be the largest exporters. They will be the firms that make storage bankable, safe, locally acceptable and compliant across markets. Investors should follow not only shipment forecasts, but localization strategy, technology diversification, project quality and lifecycle governance. The storage boom is real; the easy part of the story is over.