314Ah in short supply, 500Ah+ melee: Energy storage cell showdown begins.

In 2026, it seems that the energy storage cell industry has reached a turning point. On one hand, mainstream 314Ah energy storage cells have been in a shortage situation for a year, with prices increasing by over 20% in six months. Some leading manufacturers have quoted prices for cells exceeding 0.4 yuan/Wh. On the other hand, the third generation of large capacity cells, 500Ah+, has entered a fierce stage of competition. Multiple specifications like 587Ah, 588Ah, 628Ah, 684Ah, 702Ah, and 790Ah are developing simultaneously, and the industry has not yet formed a unified technical standard. However, more industry professionals believe that behind this turning point lies a deeper industry logic. The shortage of the second generation 314Ah cells, combined with the new generation of large capacity cell production lines still in the ramp-up phase, rising lithium carbonate prices, AI data center energy storage demand, independent energy storage, and overseas energy storage demand resonance support, the energy storage battery industry seems to be standing at a critical juncture in industrial development. The current market situation of cell shortages is not only bringing short-term profit dividends to cell companies but also suggesting that the energy storage cell market positioning is about to enter a new challenging stage. How long can the shortage of 314Ah cells last? Since the end of 2025, the "314Ah cell shortage" has become a core pain point for the entire energy storage industry. Whether it is large-scale energy storage centralized procurement projects by state-owned enterprises such as State Power Investment Corporation, China Huaneng Group, State Power Investment Corporation, or overseas energy storage orders, the market has continuously faced a structural shortage situation due to the contradiction of surging demand, old and new production capacity gaps, and rising raw material costs. The supply-demand imbalance trend continues to intensify. Firstly, both domestic and overseas orders have surged, and 314Ah has become a popular "second-generation leading application product". The full implementation of new energy storage supporting policies in China has driven the explosive growth of large-scale energy storage installations. Data shows that in the first quarter of 2026, the cumulative order volume of domestic energy storage companies exceeded 200GWh, and many public tender documents explicitly require that the cell capacity for projects should not be lower than 314Ah. Similarly, overseas energy storage projects have started a rush to install. Peak shaving energy storage in Europe, off-grid household energy storage in Australia, and AIDC energy storage requirements in North America all synchronized to release demand. In addition, with the reduction of export tax rebates for energy storage batteries from 9% to 6% in April 2026, overseas companies began to lock in and stock up, further tightening the domestic 314Ah spot inventory. Customs data shows that in the first four months of 2026, lithium-ion battery exports for domestic energy storage increased by 71.8% compared to the same period the previous year. 314Ah, with its mature mass production technology, complete stable domestic and international safety certifications, and strong compatibility with upstream and downstream supporting equipment, has cemented its position as the standard cell for mainstream energy storage stations with 2-4 hours of storage capacity in 2025-2026. Secondly, as companies switch to new 500Ah+ production lines, a vacuum period appears in the old and new capacity integration. The core contradiction of the 314Ah supply shortage in this round lies in the short-term inability to scale up production of new 500Ah+ large capacity cells by leading battery manufacturers, creating a supply gap. Since the second half of 2025, leading battery companies such as Contemporary Amperex Technology, Eve Energy Co.,Ltd., Guangzhou Great Power Energy and Technology, and Ocean Energy Storage have collectively suspended expansion projects of 314Ah inventory production lines and shifted all funds, self-owned factories, and core production equipment to the new generation of large capacity cells with 500Ah and above. In terms of construction cycle, the new energy storage cell production line construction takes as long as 6-12 months, and after the line is completed and put into production, an additional 3-6 months is needed for capacity ramp-up and downstream energy storage system adaptation and certification, resulting in a longer period for mass production to take off. By June 2026, the majority of 500Ah+ new production lines on the market have only completed small-scale trial production, with limited production capacity, unable to divert large-scale market demand for 314Ah orders. This directly resulted in a structural supply gap of "old capacity lagging behind, new capacity in short supply" in the industry. Thirdly, with frequent fluctuations in raw materials and rising costs, more uncertainty is added to cell prices. Considering the production planning of leading energy storage cell companies and the schedule for new production lines, the shortage of 314Ah cells is unlikely to be resolved quickly in the short term. In the short term, from June to August 2026, the market will remain in a high-level tight balance. There is no new supply increment for 314Ah inventory, and 500Ah+ new production lines are only supplying small quantities; coupled with the concentrated bidding and procurement of large energy storage projects in the third quarter domestically, and the concentrated installation and deliveries of overseas energy storage projects by the end of the year, the supply-demand situation continues to be tight, and the spot price of 314Ah remains at 0.37-0.4 yuan/Wh. In the medium term, from September to December 2026, the supply will slightly loosen, and prices will moderately decline. Several companies such as Ganfeng Lithium Group, Eve Energy Co.,Ltd., and Vision Power will have completed the capacity ramp-up of their 500Ah+ large capacity cells, diverting the rigid procurement demand of large energy storage stations for 314Ah. At the same time, the peak installation of overseas projects at the end of the year will come to an end, and domestic energy storage projects tendered in the first half of the year will gradually be completed and connected to the grid, leading to a slowdown in market demand. In the long term, after 2027, the industry will witness a stratification of the race, with differentiated application scenarios. The 314Ah cells will gradually phase out of the mainstream large-scale energy storage procurement market but will remain in small and medium-sized commercial and industrial energy storage and residential energy storage sub-sectors due to their adaptability and cost-effectiveness. An industry executive has made the following judgment, "Although 314Ah belongs to the short-term scarcity dividend race in the energy storage industry, it still has about 2 years of life; the main battlefield of industry competition may accelerate the transition to the 500Ah and above third-generation large capacity energy storage cell track." The 500Ah+ track is divided as the third generation cells battle heats up Unlike the rapid establishment of a unified standard in the industry during the 280Ah and 314Ah era, the current 500Ah+ track is characterized by specification fragmentation, process differentiation, and capacity competition. The industry has not yet reached a consensus on unified technical standards, with multiple specifications such as 587Ah, 588Ah, 628Ah, 684Ah, 601Ah, 702Ah, and 790Ah developing in parallel and leading companies opting for different capacity routes. At major exhibitions, all mainstream battery companies are launching their own large capacity energy storage cells, with capacity ranging from 580Ah to 1300Ah and severe fragmentation in specifications. Contemporary Amperex Technology is primarily promoting the 587Ah energy storage cell, starting mass production in June 2025, with a daily production of 220,000 cells at their Shandong facility, and cumulative shipments exceeding 5GWh by the beginning of this year. Contemporary Amperex Technology has signed a 3-year contract for at least 200GWh with Beijing HyperStrong Technology, with the core specification being the 587Ah large cell. This has already been applied in a Gigawatt-hour scale project in Baotou. Eve Energy Co.,Ltd. introduced the 628Ah cell as the first large-scale production of a 600Ah-level cell in the industry, with over a million cells produced by February this year, supporting a 400MWh large-scale energy storage station connected to the grid. They are also planning the production of the 702Ah ultra-large capacity cell, undergoing pilot testing and planning for mass production in 2027. In early June, Ocean Energy launched a new product, the Cell 650Ah cell, having previously released Cell 1300Ah/1175Ah/587Ah cells. At the system level, Ocean Energys Power 6.25MWh 2-4h energy storage system, Power 6.9MWh system, and Power 10+MWh system solutions were all unveiled to the public. It is worth mentioning that Ocean Energys 1130Ah and 587Ah cells have already secured overseas orders. Vision Power will achieve large-scale production of the 790Ah cell in July this year at their facility in Yichang, Hubei. This cell has a rated energy density of up to 2528Wh per cell and a volumetric energy density exceeding 440Wh/L, with a cycle life of 15,000 cycles. Among these, the 587Ah specification has gained more followers, with companies like Ocean Energy, Guangzhou Great Power Energy and Technology, Pengcheng Unlimited Power, REPT BATTERO, and others following this model. Additionally, Pylon Technologies has finalized the 601Ah dedicated cell; Sungrow Power Supply has independently developed the 684Ah stacked large cell; Guangzhou Great Power Energy and Technology, Chune Energy, Rongjie Energy, REPT BATTERO, and Sunwoda Electronic have launched the 588Ah cell. In just one year, the 500Ah+ track has seen the emergence of multiple mainstream differentiated cell specifications, including over 10 products like 648Ah, 650Ah, and 688Ah. Container, BMS, and PCS manufacturers need to simultaneously develop over ten sets of supporting solutions, leading to a significant increase in research and development, tooling, and production costs, resulting in an industry battle of capacity homogenization, standard absence, struggle between coil winding and stacked manufacturing processes. Companies like YIWEI, Ocean Energy, and Vision Power have adopted a dual strategy of 500Ah+ stabilizing the foundation + positioning for future above 700Ah to ensure stable delivery of 587/628Ah orders in 2026, while simultaneously pushing forward with 702Ah, 790Ah, 1130Ah, etc., to capture differentiated market segments. Industry professionals believe that "the fragmentation of 500Ah+ cell specifications will not persist in the long term, and it is expected by 2027 that the industry will converge on 2-3 large capacity cells becoming the mainstream market standard." However, for many companies, this is a hard battle that cannot be avoided. For cell companies with a certain comprehensive strength, this is definitely a "good opportunity to position themselves." Behind the shortage of cells, the global battery "positioning race" is accelerating Looking at the overall industry landscape, behind the shortage of 314Ah cells in 2026, lithium battery companies have entered a critical period of "seeking victory amid adversity." Some industry professionals have mentioned that perhaps the real battery positioning race for energy storage is beginning this year. Firstly, specialized cell deployment for specific scenarios is underway, precisely matching diverse energy storage needs. In the past, the energy storage cell industry followed a basic development model of "one cell rules all", with 280Ah and 314Ah universal cells serving large-scale energy storage and commercial and industrial energy storage across all scenarios. As we enter 2026, the industry's development logic has completely changed, shifting towards scene-customized exclusive cell development to cater to AI data center energy storage, overseas household energy storage, peak-valley arbitrage for commercial and industrial users, and long-term independent energy storage among other niche markets. Specialized cells tailored for AIDC energy storage are rapidly emerging. With the nationwide deployment of AI models, supercomputing centers, there is a strong demand for high-power short-time energy storage as a rigid supporting requirement. Companies like Contemporary Amperex Technology, Ocean Energy, and Vision Power are quickly iterating and launching AIDC exclusive high-multiple large capacity cells to seize the opportunity. According to top executives of Ocean Energy and Beijing HyperStrong Technology, the installation scale of AIDC energy storage is expected to surpass traditional new energy storage with support from 314Ah, jumping to become the largest market for incremental energy storage cells. The core value of scene-specific customized cells is to enhance downstream customer cooperation stickiness. It is also the best path for small and medium-sized energy storage battery companies to avoid being crushed by leading giants in the large capacity track and achieve steady and differentiated development. Secondly, the rapid industrialization of sodium-ion batteries is establishing a technological moat for cell companies. With long-term high fluctuations in the price of lithium carbonate and increasing difficulty in controlling lithium battery material costs, sodium-ion batteries benefit from abundant sodium resources, excellent low-temperature performance, and ample room for cost reduction in large-scale production. This has become the core breakthrough solution for energy storage companies to hedge against the cyclic price risks of lithium and tap into the lower-end general energy storage market. 2026 has officially become the year for the large-scale production of sodium-ion energy storage cells in the energy storage industry. Regarding the industry's progress in mass deployment throughout the year, Contemporary Amperex Technology's "sodium new" energy storage-specific sodium-ion battery has overcome core production bottlenecks such as water stability control and gas generation at the hard carbon negative electrode, and has already signed an annual lock-in order for 60GWh over 3 years with Beijing HyperStrong Technology. Ocean Energy, Vision Power, Guangzhou Great Power Energy and Technology, and other companies have launched various energy storage sodium cells that can adapt to scenarios like outdoor long-term energy storage in northern regions, communication backup stations, and low-temperature energy storage for high latitude households. As the scene drives industry development, diversified technical layouts have become the new "lifeline" for energy storage cell companies. Thirdly, seizing the high point of lithium battery long-duration energy storage and transforming into specialized service providers for new power systems. The penetration rate of wind and solar new energy generation is steadily increasing in China, and conventional 2-hour short-term storage is unable to solve the cross-day integration of wind and solar new energy or full-day grid peak shaving and frequency regulation needs. Long-duration energy storage of 4 hours or more has become a key direction of energy policy support in various regions, forcing energy storage cell technology towards large capacity, long cycle life, long calendar life, and all-round iteration to directly upgrade cell technology standards and meet the structural market demand of the full-range market. Industrially, the iteration of lithium long-duration energy storage has accelerated, with leading companies like Vision Power, Ocean Energy, and Eve Energy Co.,Ltd. dedicating themselves to core technology development for long-duration energy storage, setting up system support businesses, and establishing a complete loop of energy storage research, cell production, system integration, and operation for new power systems. Looking back at the industry trend for the year, 2026 is destined to be a crucial turning point for the energy storage battery industry. The current shortage of cell supply masks the underlying development contradictions of long-term homogenization in the industry. However, looking towards the medium to long term, many leading companies have already started gearing up for the future. This article was originally published on the WeChat public account "High Working Lithium Battery"; GMTEight Yan Wencai.