On April 10, 2025, the 13th International Energy Storage Summit and Exhibition (ESIE2025) commenced at the Capital International Exhibition Center in Beijing. Sigen Renewable Energy made a significant appearance, showcasing its fully modular photovoltaic and energy storage integration solutions, which highlight the company’s leading advantages in areas such as solar-storage integration, high integration, flexible deployment, and AI intelligence. This innovation supports the advancement of new energy towards a new phase of high-quality development.
As renewable energy prices transition to a market-oriented model, the energy storage industry is evolving from traditional supporting facilities to a vital pillar of the new power system, playing a crucial role in ensuring energy security and promoting low-carbon transformation. Sigen Renewable Energy is keenly aware of this significant opportunity and continues to advance an all-encompassing intelligent solar-storage integration system, providing solid support for achieving carbon neutrality goals.
The Sigen Zero Carbon Park solution includes a range of commercial and industrial inverters (50kW-125kW) and modular energy storage systems, which can be widely applied in industrial parks, commercial centers, data centers, and ground-mounted installations. The Sigen commercial solar-storage inverters feature reserved energy storage interfaces, allowing easy adaptation to various configurations, whether purely solar, purely storage, or a combination of both. Users can flexibly configure their systems based on actual needs.
With the volatility of electricity prices in the era of market pricing, the value of energy storage is being reassessed. The Sigen commercial solar-storage system supports “charge and discharge on demand,” with built-in proprietary Energy Management System (EMS) and Battery Management System (BMS). Coupled with AI applications, the system can achieve millisecond-level data collection and response. It automatically adjusts charging and discharging strategies based on real-time fluctuations in electricity prices and load demands. During low price periods, the system prioritizes energy storage, while during peak price periods, it prioritizes discharging to supply loads or feed back into the grid, enabling users to implement economic strategies such as “buy low, use high” or “buy low, sell high,” significantly enhancing the profitability of energy storage.
The Sigen Zero Carbon Park employs a fully modular design, greatly facilitating spare parts management and lifecycle maintenance for clients. Each module has a capacity of 12kWh, supporting flexible configurations from 50kWh to hundreds of megawatt-hours, allowing customization based on user energy storage needs. The commercial inverters have reserved energy storage interfaces that support the installation of solar before storage or vice versa, effectively reducing initial investment and operational costs, thus unlocking the potential value of energy storage in the competitive electricity market.
Enhancing photovoltaic utilization is key to efficiency. The Sigen Zero Carbon Park can automatically adjust energy storage strategies based on current electricity supply and demand conditions. When photovoltaic generation exceeds demand, the system prioritizes storing excess energy in batteries. Conversely, when demand exceeds photovoltaic output, it draws energy from the batteries to meet the load. This dynamic management mode maximizes photovoltaic generation, significantly improving self-consumption rates, reducing reliance on the grid, and effectively saving on electricity costs.
Sigen has innovatively introduced a direct current (DC) coupling architecture with a capacity ratio of up to 2. During peak sunlight hours, any excess direct current energy beyond load or inverter output capacity can be stored directly in the energy storage batteries without needing AC conversion. This significantly enhances overall system efficiency and energy utilization, greatly increasing the proportion of green electricity for enterprises. Additionally, the DC coupling architecture allows for higher cycle efficiency in solar-storage systems, as energy conversion occurs solely in DC during charging, reducing losses from AC to DC conversions and improving round-trip efficiency (RTE) by up to 2%.
In large grid-connected projects, the DC coupling system is simpler than its AC counterpart, saving on energy storage inverters and medium-voltage cabinets. Fewer components not only imply lower initial investment costs but also reduced maintenance workloads, resulting in higher returns for customers.
In the volatile environment of the electricity spot market, market prices and load demands change rapidly. For energy storage systems to realize their full value, they must exhibit high flexibility and responsiveness. The Sigen Zero Carbon Park solar-storage system deeply integrates artificial intelligence with big data analysis and machine learning algorithms. This allows the solar-storage system to flexibly manage photovoltaic generation, energy storage, and grid interactions based on price fluctuations, weather changes, and load demands. The system automatically optimizes the timing of battery charging and discharging, generating real-time optimal energy solutions to minimize power costs and enhance operational efficiency, easily adapting to dynamic pricing, virtual power plants, and complex power trading scenarios, providing users with the most intelligent energy experience.
To ensure system safety, the Sigen energy storage system employs battery pack-level safety measures, including sensors, active fire modules, high-temperature resistant insulation pads, insulated thermal layers, explosion-proof valves, and smoke detection devices, comprising a six-layer battery safety protection system. This setup allows for zero-distance detection of thermal runaway in battery cells, with a response time exceeding 60 seconds faster than traditional solutions. Additionally, there is a fire protection device for every 12kWh, ensuring comprehensive system safety. In contrast, traditional energy storage systems often allow fire to spread throughout the entire system during thermal runaway, making timely containment difficult due to slower response times.
The Sigen solution features an IP66-rated fully sealed design, ensuring a maintenance-free operation that guarantees system stability and safety. In comparison, traditional solutions only achieve IP55 ratings, with more vulnerable components requiring monthly inspections, part replacements every six months, and annual comprehensive maintenance. Furthermore, the modular design of the Sigen energy storage solution allows for module replacement in just two hours, greatly enhancing system reliability, while traditional containerized energy storage systems take over two days for repairs. Sigen also offers comprehensive monitoring from automatic device diagnostics to remote inspections, further optimizing intelligent operation management.
In terms of installation efficiency, the Sigen solar-storage solution significantly outperforms traditional options. Thanks to its modular design and stackable installation approach, the installation process is greatly simplified, requiring no cranes or concrete foundations, allowing for the installation of a single system in under an hour. The innovative all-network communication method dramatically increases communication speeds compared to traditional RS485, supporting device self-identification and system self-networking, completing system debugging within 15 minutes. In stark contrast, traditional solutions require specialized installation equipment and take eight hours for a single system installation, significantly increasing waiting times and installation costs for users.
For residential and small commercial applications, the Sigen Zero Carbon Home solution integrates photovoltaic inverters, energy storage inverters, energy storage batteries, DC charging modules, and energy management systems into the SigenStor solar-storage integrated machine. This device supports rapid switching between grid-connected and off-grid modes, providing stable power supply during outages. With efficient energy management, advanced safety features, and innovative AI integration, the solution has received high recognition from exhibition visitors. The company has stated its commitment to continuing technological innovation and product optimization while expanding the application boundaries of solar-storage integration, providing more efficient and reliable green energy solutions to users across various industries. This effort aims to support the construction of a new power system and accelerate the transition of the energy system towards low-carbon, efficient, and intelligent standards.
