Eight Companies, Including Jinko Energy and Sungrow, Race Towards the Era of High-Capacity Energy Storage Systems Exceeding 500kWh

As a crucial technology for optimizing energy distribution and reducing electricity costs, commercial and industrial energy storage is experiencing a period of explosive growth. Between 2024 and 2025, leading energy storage companies, including Jinko Energy, Yongtai Energy, Penghui Energy, Weiheng Smart, Kelun Electronics, Ronghe Yuanshu, Sungrow Power, and CATL, are launching new large-capacity energy storage systems with capacities exceeding 500kWh. These new products not only achieve technological breakthroughs but also demonstrate competitive advantages in cost control, safety performance, and intelligent management, offering innovative energy solutions for commercial and industrial users.

Currently, the capacity specifications of commercial storage products from various manufacturers are not standardized, each presenting unique advantages. According to a review by EnergyTrend, several characteristics of commercial energy storage products from various companies include:

Entering the “Large Capacity Era”: To reduce costs and improve efficiency, products with capacities over 500kWh are emerging. From a system perspective, large capacity energy storage systems can reduce the footprint, lower installation, operation, and maintenance costs, and enhance economies of scale.

Widespread Application of Large Capacity Cells: Large capacity cells can minimize the number of integrated components, thereby reducing costs while maintaining long cycle life and lowering the levelized cost of electricity over the entire lifecycle.

Modular Design: Modular design allows energy storage systems to gradually increase the number of modules according to actual needs, enabling efficient deployment and flexible expansion. For example, Jinko Energy’s Dolphin 520kWh commercial energy storage system supports the connection of 1 to 12 units in an off-grid setup, allowing for flexible capacity expansion in response to the growth in user scale and changing electricity demands.

Enhanced Safety Performance: Safety is reinforced through multiple dimensions, including battery cells, thermal management, and fire prevention, to reduce the risk of thermal runaway. Additionally, technologies like AI are utilized for real-time monitoring, intelligent operation, and fault warnings in energy storage systems.

Full-Scenario Adaptability: Customized solutions are developed for various scenarios such as factories and industrial parks to accommodate diverse applications.

Jinko Energy: The Dolphin 520kWh commercial energy storage system exemplifies modular integration, opening a new chapter in efficient energy storage. Launched on May 20, this system combines large capacity, high flexibility, strong adaptability, and stringent safety features. It uses high-performance 314Ah battery cells, with a precise direct current system capacity of 520kWh. The alternating current side can adapt to 125kW (4h system) and 250kW (2h system) three-phase four-wire output to meet diverse demands like continuous production, peak-valley arbitrage, ancillary frequency regulation, and microgrid backup power. The system is designed for efficient deployment and flexible capacity expansion, achieving over 10% cost reduction and a 40% increase in installation efficiency, along with shortened project construction cycles for “immediate use.”

Yongtai Energy: The 522L Intelligent Liquid Cooling Commercial Storage System ensures both cost and performance advantages. Released on the same day, it employs a self-developed Liquid Cooling 2.0 Pack that effectively controls the temperature difference of the battery cells to ≤2.5°C, ensuring battery performance and longevity, and can operate reliably in temperatures ranging from -20°C to 55°C. It features cloud-edge collaborative AI predictive warning capabilities, significantly enhancing safety, extending product lifespan by over 20%, and reducing levelized cost of electricity by 15%.

Penghui Energy: The Qingtian 520 energy storage cabinet showcases innovative overall architecture, doubling production and delivery efficiency. Launched on February 14, 2025, the Qingtian 520 has a capacity of 520kWh, with a 4% improvement in energy efficiency and a 54% reduction in footprint. This innovative design enhances efficiency and is expected to provide around an 8% increase in annual operating revenue for end-users.

Weiheng Smart: The PowerCore series 62.5-250kW/500kWh commercial energy storage system was introduced in May 2025. It uses CATL’s 306Ah original battery modules, with modular AC/DC design meeting flexible expansion needs for small to large-scale commercial applications. The system has achieved VDE 4110 certification, ensuring seamless integration with the EU power grid, and is equipped with AI-driven PANGU OS for dynamic optimization of charging and discharging strategies.

Kelun Electronics: The Aqua E series 522kWh storage system, launched at the ESIE 2025 Energy Storage Exhibition, features an “All-in-One” design that reduces footprint by 30% while achieving a comprehensive efficiency of ≥90% and a power output of 250kW. Compared to traditional outdoor cabinets with capacities of 200-300kWh, this new product doubles the capacity while ensuring extreme safety, performance, stability, and intelligent operation.

Ronghe Yuanshu: The Ronghe Tianlu 3.0 Max storage product launched on November 28, 2024, has a single machine capacity of 250kW/500kWh, supporting 2-hour or 4-hour project needs. Its operation platform “Tianlu Smart Control” enhances customer revenue by about 20% using load forecasting algorithms, and by an additional 20% through AI analysis of historical load data.

Sungrow Power: The PowerStack 800CS, released on September 25, 2024, targets large industrial users with an 836kWh “golden capacity” liquid cooling storage system. It addresses the higher demands of large industries for economic viability, convenience, and safety, featuring one-click power pricing strategies and cloud-based management capabilities.

CATL: The TENER Flex storage cabinet, unveiled at the UK Energy Storage Exhibition in September 2024, has a capacity of 376kW/752kWh. This product is noted for its compact design and exceptional flexibility, winning significant industry attention.

In summary, the emergence of new 500kWh commercial storage products is reshaping the industry landscape with their combination of large capacity and high integration. Through modular design, they enable flexible deployment and efficient expansion. The deep application of cutting-edge technologies like intelligent liquid cooling and AI management greatly enhances system safety and economic viability over their lifecycle. As these quality products are deployed, they will significantly promote green and low-carbon development, injecting continuous innovation into the energy sector.