EVE Energy claims world’s first utility-scale deployment of 628Ah-cell batteries

Building on its success in launching the mass production of large-capacity battery cells, China’s EVE Energy has now eqipped the world’s first utility-scale energy storage project using its 628Ah products.

On September 8, the 200 MW/400 MWh Lingshou standalone energy storage project in Hebei, China – jointly developed by EVE Energy and State Grid Power Technology – was successfully connected to the grid. It represents the world’s first large-scale application of 628Ah cells in a 100MWh-level facility, setting a new industry benchmark.

EVE Energy delivered and grid-connected 80 Mr.Giant energy storage systems and 40 integrated converter cabins within just one week. “From quality control and engineering coordination to system commissioning and operational support, EVE Energy has proven the maturity and feasibility of big-batteries technology,” the company said in a statement.

Mass production of these large-capacity cells began in December 2024, making EVE Energy the first manufacturer to mass-produce lithium iron phosphate (LFP) battery cells with capacities exceeding 600 Ah for stationary storage applications.

The cells are part of EVE Energy’s Mr. Flagship series designed for battery energy storage system applications. The 628 Ah Mr. Big cell is integrated into the Mr. Giant system – a 20-foot containerised unit with up to 5 MWh energy storage capacity and suitable for 4+ hour long-duration storage.

However, EVE’s Mr. Big is not the largest cell announced to date. For instance, Chinese manufacturer Hithium showcased the industry’s first LFP battery cell breaking the 1000 Ah barrier last year. Their MIC 1130Ah cell is designed for long-duration storage of four to eight hours.

More recently, BYD relased a new battery energy storage system with the world’s largest single-unit capacity of 14.5 MWh. Named HaoHan, the system uses BYD’s self-developed 2,710 Ah Blade Battery cell, which the company claims is the largest energy storage cell in the world.

While 300 Ah+ products remain the industry standard, there are multiple reasons behind the move to even larger capacity cells. Using prismatic LFP cells with double the capacity effectively halves the number of cells, connection points and overall system components. According to many manufacturers, this leads to significant improvements in performance and maintenance efficiency and lower cost – primarily due to increased energy density per square meter.

On the downside, failures in larger cells have a greater impact on the system level, and thermal management becomes more challenging because larger cells emit more heat during charge and discharge cycles, making it harder to maintain uniform temperature.

EVE Energy has already begun shipping the Mr. Giant energy storage system equipped with 628Ah cells overseas. The company completed its first batch of shipments to Australia and Europe on September 10.