EVE Energy's 6.9 MWh V Energy Storage System Debuts at ESIE 2026

On April 1, the 14th International Energy Storage Summit and Exhibition (ESIE2026) opened in Beijing. As a highly influential barometer for the global energy storage industry, this year’s exhibition brings together more than 800 energy storage companies. At the event site, battery cells with capacities of 587Ah, 588Ah, 601Ah, 648Ah and even larger capacities, as well as 6.25MWh systems, made a concentrated appearance. As experts noted, a full-scale race toward mass production of high-capacity cells and systems has been underway.

EVE Energy Co., Ltd. brought a 6.9MWhv energy storage system to the exhibition. Previously, this company spent more than 20 months enabling the Mr. Giant energy storage system equipped with 628Ah large batteries to operate continuously at the Jingmen demonstration station, accumulating firsthand operational data. According to measured results, system efficiency exceeds 95.5%, with smooth and reliable operation.

As introduced, high-efficiency integration is the first ace up the sleeve for this technological breakthrough. By pushing the energy density of individual cell units to above 430Wh/L, the system’s overall volumetric energy density achieved a 10% leap. This means that in a typical 200MWh energy storage project, the system can reduce the site footprint by 6%, helping the owner save a substantial amount of investment cost.

Ultra-long service life is the economic ledger that EVE Energy Co., Ltd. has worked out for owners. Smart balancing technology increases the maximum balancing current to 3A, ensuring that under complex operating conditions the voltage differential between battery cells is always maintained at an extremely low level within 250mV. This allows the system’s cycle life to reach as many as 10,000 cycles at 70% SOH, fulfilling the technical commitment that the system and the cells have the same lifespan.

In addition, in terms of the protective architecture, the power-side provides 1500VDC full-voltage, five-level interlocked protection, achieving end-to-end response for fault currents; the warning-side uses an “AI monitoring + composite detection + graded fire extinguishing” solution, shifting the defense line from passive remediation to proactive prevention, and laying a solid foundation for safety.

By the end of 2025, EVE Energy Co., Ltd.’s shipments of energy storage batteries ranked second globally, with cumulative shipments exceeding 150GWh. “In the energy storage system market, systems with capacities of 6MWh and above are still mostly in the prototype demonstration or R&D stage.” A relevant executive from EVE Energy Co., Ltd. said that for owners, choosing a high-capacity energy storage system means finding a balance among technological advancement, delivery certainty, and long-term reliability. The industry’s competitive focus is shifting from concept products to large-scale delivery capability—from “who can make it bigger” to “who can deliver it more reliably.” (China Economic Net reporter Tong Mingbiao)

(Editor-in-charge: Yang Xiufeng)

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