New Era of Large-Scale Energy Storage: Eight Companies, Including Jinko and Sungrow, Launch Over 500kWh Solutions

As a key technology for optimizing energy allocation and reducing electricity costs, commercial and industrial energy storage is entering a phase of explosive growth. Between 2024 and 2025, numerous energy storage companies are ramping up their efforts, including Jinko Energy, Yongtai Energy, Penghui Energy, Weiheng Intelligent, KeLiu Electronics, Ronghe Energy Storage, Sungrow Power, and CATL, all of which are set to launch new high-capacity energy storage systems exceeding 500kWh. These new products not only achieve technological breakthroughs but also demonstrate strong competitiveness in cost control, safety performance, and intelligent management, providing innovative energy solutions for commercial and industrial users.

Currently, the capacity specifications of commercial energy storage products from various manufacturers in the market are not standardized, with each showing unique advantages. According to a review by TrendForce, several characteristics of these commercial energy storage products are emerging:

• Transition to the “Large Capacity Era”: To reduce costs and improve efficiency, products with capacities of over 500kWh are continuously emerging. From a system perspective, large-capacity energy storage systems can reduce space requirements, lower installation and maintenance costs, and increase economies of scale.
• Widespread Use of Large Capacity Cells: Large capacity cells reduce the number of integrated components, thereby lowering costs while maintaining long cycle lifespans and reducing the levelized cost of electricity over the entire lifecycle.
• Modular Design: Modular design allows energy storage systems to increase the number of modules gradually based on actual needs, enabling efficient deployment and flexible expansion. For instance, the Jinko Energy Dolphin 520kWh commercial energy storage system supports 1 to 12 units for grid-connected or off-grid operation, allowing for flexible system capacity expansion based on user scale and electricity demand.
• Enhanced Safety Performance: Safety is reinforced through multiple dimensions, including battery cells, thermal management, and fire safety, reducing the risk of thermal runaway. Additionally, intelligent AI technologies enable real-time monitoring and predictive maintenance of energy storage systems.
• Full-Scenario Adaptability: Custom-designed products for different scenarios such as factories and parks, adapting to a variety of applications.

Jinko Energy: The Dolphin 520kWh commercial energy storage system exemplifies modular integration, marking a new chapter in efficient energy storage. Officially launched on May 20, this system combines large capacity, high flexibility, strong adaptability, and stringent safety features. It utilizes high-performance 314Ah battery cells, precisely defining a system capacity of 520kWh on the DC side, capable of supporting three-phase four-line outputs of 125kW (4-hour system) and 250kW (2-hour system). This meets diverse needs such as continuous factory production, peak-valley arbitrage, auxiliary frequency regulation, and off-grid backup power.

Notably, this system employs a highly integrated and standardized modular design, achieving over 10% cost reduction, a 40% increase in installation efficiency, and shorter project construction cycles, allowing for “plug-and-play” deployment. The Dolphin 520kWh system has received international certifications such as GB, IEC, and UL, and features a three-layer protection system for structural, electrical, and fire safety, along with intelligent temperature control and multi-level monitoring systems that ensure stable and safe electricity usage.

Yongtai Energy: The 522L Intelligent Liquid-Cooling Commercial Storage System optimizes cost and performance. Released on the same day, this system utilizes self-developed liquid cooling technology, effectively controlling temperature differences in battery cells to ≤2.5°C, ensuring battery performance and lifespan even in extreme conditions from -20°C to 55°C. It also integrates cloud-edge collaborative AI for predictive warnings, significantly enhancing safety and extending product lifespan by over 20%, while reducing the levelized cost of electricity by 15%.

Penghui Energy: The Qingtian 520 energy storage cabinet features innovative overall architecture, doubling production and delivery efficiency. Launched on February 14, 2025, the Qingtian 520 has a capacity of 520kWh, a 4% energy efficiency improvement, and a 54% reduction in footprint. This is achieved through technological innovation in product structure and intelligent temperature control, potentially increasing annual operational revenue for end customers by around 8%.

Weiheng Intelligent: The PowerCore series 62.5-250kW/500kWh commercial energy storage system leverages AI for flexible expansion. Unveiled at Intersolar Europe 2025, this system uses CATL’s 306Ah original battery modules, providing 500kWh capacity with modular AC/DC design to meet flexible expansion needs from small to large commercial entities. It also features VDE 4110 certification for seamless integration with the EU grid.

KeLiu Electronics: The Aqua E series 522kWh storage system emphasizes intelligent operation and comprehensive management, setting a new benchmark for safety and efficiency. Launched at the Beijing ESIE 2025 energy storage exhibition on April 10, this system adopts an “All in one” design, reducing footprint by 30% while achieving system efficiency of ≥90% and power output of 250kW.

Ronghe Energy Storage: The Ronghe Tianlu 3.0 Max features upgraded intelligent control for enhanced profitability. Released on November 28, 2024, this product boasts a capacity of 250kW/500kWh, suitable for 2-hour or 4-hour project requirements, and utilizes specialized packs and core components tailored for commercial energy storage.

Sungrow Power: The PowerStack 800CS, launched on September 25, 2024, targets large industrial applications with its 836kWh “golden capacity”, accommodating various voltage levels and MVS cabinets, and ensuring user-friendly cloud management features.

CATL: The TENER Flex storage cabinet, introduced at the UK Energy Storage Exhibition in September 2024, features a compact design of 376kW/752kWh, combining flexibility, safety, and excellent performance, catering to large-scale industrial users.

In summary, the introduction of these new commercial energy storage products exceeding 500kWh is reshaping the industry landscape. These products combine large capacity and high integration, allowing for flexible deployment and efficient expansion. Furthermore, the deep application of cutting-edge technologies like intelligent liquid cooling and AI management significantly enhances system safety and economic viability throughout their lifecycle. As these high-quality products are deployed, they will contribute substantially to promoting green and low-carbon development, injecting continuous innovation into the energy sector.