Sunrgow Showcases Wide Range Of ESS Solutions At SNEC 2025

During the SNEC 2025 exhibition in Shanghai, China, Sungrow showcased its comprehensive portfolio of application-specific energy storage systems (ESS), including solutions for utility-scale, commercial & industrial (C&I), and residential use.  

Utility-Scale ESS Solutions 

1+X 2.0 Modular Inverter 

The company unveiled its next-generation 1+X 2.0 Modular Inverter for utility-scale applications. The characteristics of this new model can be classified according to multiple key metrics.  

Flexibility 

The 1+X 2.0 Modular Inverter consists of individual 0.8 MW power modules, which can be connected in parallel to up to 12 units, to scale up to 9.6 MW, offering greater modularity than its predecessor. Unlike conventional centralized inverters, each module adopts a split architecture, separating critical components, such as Insulated Gate Bipolar Transistors (IGBTs) and capacitors, into an upper inverter section. This design enables rapid on-site replacement, so that a single module can be swapped in just 1 hour, significantly reducing downtime and generation loss. 

Resilience 

Engineered to operate without derating in extreme environments, including temperatures up to 52°C, the 1+X 2.0 integrates high-power-density semiconductors, a high-efficiency heat exchanger, and a dual-cycle thermal management system. To endure harsh conditions such as dust and heat, the system is housed in an IP66-rated enclosure and incorporates advanced heat dissipation technologies along with a self-cleaning air duct system, ensuring sustained performance over time. 

On the safety side, Sungrow says it uses an AI-driven DC side management system, designed to mitigate risks such as short circuits, arc faults, and terminal overheating – the key causes of PV plant fires. In the event of an arc fault, the inverter’s dual arc protection mechanism triggers a rapid disconnection via the corresponding combiner box in under 40 milliseconds. To prevent fault propagation, other combiner boxes in the same inverter block are also shut down simultaneously through inverter cluster control. Additionally, a high-precision temperature monitoring system enables continuous scanning of terminal connections, providing early warnings and allowing for proactive intervention in case of overheating. 

Functionality  

Designed with grid flexibility in mind, the 1+X 2.0 supports both DC and AC coupled PV + storage configurations. However, the company says that its DC-coupled setup offers greater efficiency and cost-effectiveness compared to the AC variant. Also, the inverter incorporates advanced grid-forming technology, enabling it to provide an inertia-like response in under 5 ms during grid fluctuations, helping stabilize system frequency. The company adds that the inverter can also tolerate transient overvoltages of up to 1.8 times the nominal voltage, ensuring operational continuity under volatile conditions. In addition, its grid-forming capabilities eliminate the need for diesel generator (DG) sets during construction. It can form microgrids within or across multiple inverter blocks.   

PowerTitan 3.0 ESS Platform 

Addressing the need for a utility-scale ESS system with higher energy density in a small footprint, the company showcased its latest PowerTitan 3.0 ESS platform.  

Integrated with 614 Ah capacity battery cells, this system offers 3 different types of solutions of multiple dimensions and energy storage capacity (MWh) – 10 ft Flex (3.45 MWh), 20 ft Class (6.9 MWh), and 30 ft Plus (12.5 MWh) variants. According to the company, these models can support backup storage power for a range of durations between 2 hours and 12 hours.  

Notably, the largest variant under this ESS platform can be upscaled to up to 50 MWh of storage capacity by connecting 4 parallel units with a power density of over 500 kWh/m², meeting the higher demand for utility-scale consumers.  

This system is designed to arrange both the battery system and the power conversion system (PCS) in a single platform, which reduces land footprint by 45% and cabling by 10%, compared to its conventional counterpart, claims Sungrow. Regarding the efficiency of periodic charging and discharging, the platform achieves round-trip efficiency (RTE) of 93.5%, attributed to its AC-block design featuring a stacked battery cell and liquid-cooled silicon carbide (SiC) power conversion system (PCS).  

C&I Application  

PowerStack 255CS   

Addressing the needs of C&I consumers, Sungrow’s PowerStack 255CS, equipped with 314 Ah battery cells, offers a power output of up to 125 kW and 257 kWh of energy storage for up to 2 hours and 514 kWh for up to 4 hours. Its integrated AC block design boosts the system’s round-trip efficiency (RTE) to over 90%, enhances charge/discharge efficiency, and supports a product lifespan of up to 20 years. Regarding scalability, up to 25 power stacks can be paralleled. 

In terms of protection, this UL9540- and NFPA 855/69/68/14-certified energy storage solution includes a range of safety features, such as thermal runaway prevention through advanced cell anomaly detection, multi-stage overcurrent protection, and a multi-layer early-stage aerosol-based fire detection system. Additionally, its comprehensive safety design incorporates fuse protection at the cabinet, rack, and pack levels, providing robust fire prevention and enhanced operational security. 

Designed to meet the operational needs of C&I customers, this solution supports various applications, including standalone energy storage, PV + storage integration, EV charging + storage, and microgrid systems, ensuring both grid stability and profitability.  

SH125CX hybrid inverter 

The SH125CX, a hybrid inverter with a nominal output of 125 kW, can be paired with the PowerStack 255CS to form a DC-coupled solution designed specifically for medium and large C&I applications. This 125 kW hybrid inverter, equipped with up to 10 MPPT channels, has a high maximum input current of 40 A per MPPT. In addition, it can connect up to 20 strings. It supports DC/AC ratios of up to 2.0, meeting the demands of the C&I market. 

The DC-coupled configuration helps reduce capital expenditure (CapEx) by minimizing the need for additional AC distribution components, standalone PV inverters, and external energy management systems. The system supports up to 24 units operating in parallel, achieving a combined maximum of 3 MW AC output and 6 MWh of energy storage capacity.