The energy storage cell industry appears to have reached a pivotal turning point in 2026. On one hand, the mainstream 314Ah energy storage cell is experiencing a year-long "tight supply" situation, with cell prices rising over 20% in half a year. Some leading manufacturers' quotes have already surpassed 0.4 yuan/Wh. On the other hand, the 500Ah+ third-generation large-capacity cell market has entered a phase of intense competition, with multiple specifications like 587Ah, 588Ah, 628Ah, 684Ah, 702Ah, and 790Ah developing in parallel, and the industry has yet to establish a unified technical standard. However, many industry insiders believe that a deeper industry logic lies beneath this inflection point. The tight supply of the second-generation 314Ah cell, combined with the ramp-up phase for new large-capacity cell production lines, ongoing increases in lithium carbonate prices, and the combined demand drivers from AIDC computing power storage, independent storage, and overseas storage, places energy storage battery companies at a critical juncture in industrial development. The current supply-constrained market is not only providing short-term profit opportunities but also signifies that the battle for position in energy storage cells is entering a new and challenging phase.
How Long Will the 314Ah Shortage Last?
Since late 2025, "shortage of 314Ah cells" has become a core pain point across the industry. Whether for large-scale centralized procurement projects by state-owned enterprises like State Power Investment, China Huadian, or China Energy Engineering, or for overseas storage orders, the market faces a structural shortage driven by surging demand, a gap between old and new production capacity, and rising raw material costs, with the supply-demand imbalance worsening.
First, there has been a concentrated surge in domestic and international orders, making the 314Ah a highly sought-after "second-generation mainstream product." The full implementation of domestic new energy storage support policies, including the rollout of capacity tariffs for independent storage and mandatory storage allocation for new energy projects, has directly driven explosive growth in large-scale domestic storage installations. Data shows that cumulative orders for domestic storage companies in Q1 2026 exceeded 200GWh, with many public tenders explicitly requiring cell capacities of no less than 314Ah. Overseas markets are simultaneously experiencing a rush to install storage projects, with demand from European grid peak-shaving storage, Australian off-grid residential storage, and North American AIDC computing power storage being released concurrently. Coupled with a reduction in the export tax rebate for storage batteries from 9% to 6% in April 2026, overseas companies have locked in orders in advance, further tightening domestic 314Ah spot inventory. Customs data confirms this, showing a 71.8% year-on-year increase in China's lithium battery storage exports in the first four months of 2026. With advantages in mature mass production processes, comprehensive international safety certifications, and strong compatibility with upstream and downstream equipment, the 314Ah has solidified its position as the standard cell for mainstream 2-4 hour storage power stations from 2025 to 2026.
Second, companies switching to new 500Ah+ production lines has created a vacuum in capacity transition. The core issue behind the current 314Ah shortage is that new large-capacity cell lines from leading battery makers cannot achieve scale production in the short term, directly creating a supply gap. Since the second half of 2025, top storage battery companies including CATL (ASX: 03750), EVE Energy, Penghui Energy, and Highsun have collectively halted expansions of existing 314Ah production lines, redirecting capital, factory space, and core equipment towards new-generation large-capacity cell lines above 500Ah. The construction cycle for a new storage cell line is typically 6-12 months, followed by a 3-6 month ramp-up and downstream system adaptation certification period, resulting in a long lead time to full-scale production. As of June 2026, most new 500Ah+ lines have only achieved small-batch trial production with limited capacity, unable to divert the substantial market demand for 314Ah, creating a structural supply gap where "old capacity can't keep up and new capacity isn't ready."
Third, frequent raw material price fluctuations and rising costs have added further uncertainty to cell pricing. Based on production schedules from leading companies and new line timelines, the tight 314Ah supply situation is unlikely to resolve quickly. In the short term (June-August 2026), a tight balance at high prices is expected to persist. With no new 314Ah capacity additions and 500Ah+ lines only ramping up slowly, coupled with concentrated domestic large-scale storage tenders in Q3 and a year-end rush for overseas project deliveries, supply will remain tight, keeping 314Ah spot prices high at 0.37-0.4 yuan/Wh. In the medium term (September-December 2026), supply is expected to ease slightly, leading to a moderate price decline. As companies like Ganfeng Lithium, EVE Energy, and Envision AESC complete the ramp-up of their 500Ah+ lines, they can absorb some of the rigid demand for 314Ah from large storage projects. Simultaneously, the overseas year-end installation rush will wind down, and domestic projects awarded earlier in the year will gradually complete grid connection, easing marginal demand. Long-term, post-2027, market segmentation and application divergence are anticipated. The 314Ah will gradually exit the mainstream large-scale centralized procurement market but will persist in smaller-scale commercial, industrial, and residential storage segments due to its suitability and cost-effectiveness. An industry executive noted, "Although the 314Ah represents a short-term scarcity-driven opportunity, it still has about two years of life left. The main competitive battleground will likely shift faster to the third-generation large-capacity storage cell segment above 500Ah."
The Fragmented 500Ah+ Arena and Intensifying Competition
Unlike the rapid standardization seen in the 280Ah and 314Ah eras, the current 500Ah+ segment is characterized by specification fragmentation, process divergence, and a capacity race, with the industry lacking a unified technical consensus. Multiple specifications like 587Ah, 588Ah, 628Ah, 684Ah, 601Ah, 702Ah, and 790Ah exist in parallel, with leading companies betting on different capacity paths. Exhibitions reveal that all major battery firms have launched their own large-capacity storage cells, with capacities ranging from 580Ah to 1300Ah, indicating severe specification fragmentation.
CATL primarily promotes its 587Ah cell, which achieved mass production in June 2025 with a daily output of 220,000 cells from its Shandong base and cumulative shipments exceeding 5GWh by early this year. CATL has signed a procurement agreement with Hyperstrong for no less than 200GWh from 2026 to 2028, focusing on the 587Ah cell, which has already seen GWh-scale application in a 400MW/2400MWh project in Baotou. EVE Energy's 628Ah cell is the industry's first 600Ah-level cell to achieve large-scale mass production, with over 1 million units produced by February this year, supporting a 400MWh large-scale storage project. The company is also developing a 702Ah ultra-large capacity cell, which has completed pilot testing with mass production planned for 2027. Highsun launched its new ∞Cell650Ah product in early June, having previously released ∞Cell models of 1300Ah, 1175Ah, and 587Ah. At the system level, Highsun also unveiled its ∞Power 6.25MWh (2-4h) system, ∞Power 6.9MWh system, and ∞Power 10+MWh solution. Notably, Highsun's 1130Ah and 587Ah cells have already secured overseas orders. Envision AESC plans to achieve large-scale production of its 790Ah cell at its Yichang, Hubei base in July this year. This cell boasts a single-unit rated energy of 2528Wh, a volumetric energy density exceeding 440Wh/L, and a cycle life of 15,000 cycles. The 587Ah specification has several followers, including Highsun, Penghui Energy, Pengcheng Wuxian, and REPT. Additionally, Pylontech has finalized a 601Ah specialized cell; Sungrow Power, in collaboration with upstream cell partners, is developing a 684Ah laminated large cell; and companies like Penghui Energy, Chuneng New Energy, Rongjie Energy, REPT, and Sunwoda have introduced 588Ah cells.
Within a year, the 500Ah+ segment has spawned numerous differentiated mainstream specifications, with over 10 product variants including 648Ah, 650Ah, and 688Ah. This forces container, BMS, and PCS manufacturers to develop over a dozen corresponding system solutions, significantly increasing R&D, tooling, and production costs. The industry is mired in a "capacity war, lack of standards, and battle between winding and lamination processes." Companies like EVE, Highsun, and Envision are adopting dual-track strategies, using "500Ah+ to stabilize the core business + 700Ah+ to position for the future." They rely on 587Ah/628Ah to secure 2026 order deliveries and stable cash flow while simultaneously advancing 702Ah, 790Ah, and 1130Ah cells to capture differentiated markets. Industry observers predict, "The specification fragmentation in the 500Ah+ segment won't last indefinitely. By 2027, the industry is expected to converge on 2-3 large-capacity cell models as mainstream standards." For many companies, however, this is a necessary and challenging battle. For cell makers with certain comprehensive capabilities, it represents "an excellent opportunity to secure a market position."
The Global Battery Positioning Race Intensifies
Looking at the broader industry, the 314Ah shortage in 2026 signifies that energy storage lithium battery companies have entered a critical "survival of the fittest" period. Some insiders suggest that the real battle for position in storage batteries may begin this year.
First, scenario-specific dedicated cells are being mass-produced, precisely matching diverse storage needs. The industry previously followed a "one cell fits all" model, with general-purpose 280Ah and 314Ah cells serving both large-scale and commercial/industrial storage. In 2026, the industry logic has fundamentally shifted towards customized cell development for specific applications. For segments like AIDC computing power storage, overseas residential storage, commercial/industrial peak-valley arbitrage, and long-duration independent storage, cells are being designed with tailored structures, rates, low-temperature performance, and safety levels. For instance, AIDC-specific cells are rapidly emerging. With the nationwide rollout of AI large models and supercomputing data centers, short-duration, high-power storage for computing facilities has become a mandatory requirement. Companies like CATL, Highsun, and Envision AESC are quickly iterating to launch high-rate, large-capacity cells for AIDC, aiming to seize first-mover advantage. Executives from Highsun and Hyperstrong concur that by 2027, AIDC storage installations will surpass traditional renewable energy-paired storage, becoming the largest incremental market for storage cells. The core value of scenario-specific cells lies in strengthening customer loyalty and providing a viable path for small and medium-sized storage battery companies to avoid head-on competition with giants in the large-capacity arena, enabling differentiated and stable growth.
Second, sodium-ion battery industrialization is accelerating, building a technological moat for cell makers. With lithium carbonate prices remaining volatile at high levels, managing lithium battery material costs has become increasingly difficult. Sodium-ion batteries, leveraging advantages like abundant sodium resources, excellent low-temperature performance, and significant cost reduction potential at scale, have become a core strategy for storage companies to hedge against lithium price cycles and penetrate the low-end general storage market. 2026 marks the first year of scaled sodium-ion battery production for storage. CATL's "Na Xin" sodium-ion battery for storage has overcome key mass production challenges related to moisture stability and hard carbon anode gassing. The company has already signed a three-year, 60GWh annual agreement with Hyperstrong. Companies like Highsun, Envision AESC, and Penghui Energy have launched multiple sodium-ion storage cells suitable for specific scenarios such as northern outdoor long-duration storage, communication backup base stations, and high-latitude residential low-temperature storage. As applications drive industry development, diversified technology portfolios have become a new "lifeline" for storage cell companies.
Third, companies are vying for the long-duration lithium battery high ground, transforming into professional service providers for new power systems. With the increasing penetration of wind and solar power in China, conventional 2-hour short-duration storage cannot address the core needs of cross-day renewable energy consumption and all-weather grid peak-shaving and frequency regulation. Storage exceeding 4 hours has become a key policy focus, forcing cell technology to evolve towards larger capacity, longer cycle life, and longer calendar life. This shift towards long-duration storage is directly reshaping cell technology standards and overall market demand structures. On the industrial front, the transition to long-duration lithium batteries is accelerating. Leading firms like Envision AESC, Highsun, and EVE Energy are focusing on core long-duration storage technologies and expanding into system integration, aiming to create a full business闭环 from R&D and cells to systems and operation & maintenance for the new power system.
Reflecting on the year's trends, 2026 is destined to be a critical watershed for the energy storage battery industry. The current cell supply gap masks the underlying issue of long-term homogenized competition. However, from a medium- to long-term perspective, many leading companies are already gearing up for a full sprint forward.
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