Sige New Energy Unveils Innovative DC Coupling Architecture to Transform Solar Storage Systems

China Energy Storage Network – System Integrators – Sigen Energy Launches Innovative DC Coupling Architecture to Transform Solar Storage Systems

On April 10, Sigen Energy unveiled a fully modular solar storage integration solution in Beijing, showcasing its leading advantages in solar storage integration, high levels of integration, flexible deployment, and artificial intelligence capabilities, thereby supporting the transition of new energy to a higher quality development stage.

As new energy prices fully enter the market stage, the energy storage industry is evolving from traditional support facilities to a vital component of new power systems, becoming an essential force for ensuring energy security and promoting low-carbon transformation. Sigen Energy has keenly identified this significant opportunity and is continuously advancing a comprehensive intelligent solar storage integration system to provide robust support for achieving the “dual carbon” goals.

The Sigen Zero Carbon Park solution includes a series of commercial and industrial inverters (ranging from 50kW to 125kW) and modular energy storage systems, which can be widely applied in various scenarios such as industrial parks, commercial centers, data centers, and ground installations. The inverters are designed with reserved energy storage interfaces to easily accommodate pure solar, pure storage, or combined solar-storage modes, allowing users to configure according to actual needs.

Energy Price Fluctuations Drive Reevaluation of Storage Value

With the entry of energy prices into a market-driven phase, the volatility of new energy prices will significantly increase, making the adjustment capabilities and intelligence of energy storage systems increasingly important. The Sigen commercial solar storage system supports a “charge and discharge as needed” feature, incorporating self-developed Energy Management System (EMS) and Battery Management System (BMS) with artificial intelligence applications. This allows for millisecond-level data collection and response, automatically adjusting charging and discharging strategies based on real-time price fluctuations and load changes. When prices are low, the system prioritizes storage, while during peak pricing, it discharges energy to loads or feeds back to the grid, helping users implement economic strategies of “buy low, use high” or “buy low, sell high,” greatly enhancing the profitability of energy storage.

The Sigen Zero Carbon Park employs a fully modular design, greatly facilitating spare parts and lifecycle maintenance for customer installations. Each module has a capacity of 12kWh, supporting flexible configurations from 50kWh to 100MWh, tailored to meet actual energy storage needs. The commercial inverters are designed to support the installation of solar first or storage first, effectively reducing initial investment and operational costs, thereby unlocking the value potential of energy storage in a market-driven electricity landscape.

Maximizing Photovoltaic Consumption is Key to Profitability

The innovative DC coupling architecture proposed by Sigen Zero Carbon Park allows for automatic adjustments of storage strategies based on current power supply and demand. When there is excess photovoltaic generation, the system prioritizes storing surplus energy in batteries. Conversely, when electricity demand exceeds photovoltaic output, the system instantaneously draws power from the batteries. This dynamic management mode maximizes the utilization of photovoltaic generation, significantly increasing self-consumption rates and reducing dependence on the grid, effectively lowering electricity costs. The DC coupling architecture can achieve a matching ratio of up to 2, allowing excess DC energy during peak sunlight hours to be stored efficiently in batteries without AC conversion, significantly enhancing overall system efficiency and energy utilization rates, and increasing the proportion of green electricity used by enterprises.

Moreover, the DC coupling architecture improves the cycle efficiency of solar storage systems. During charging, energy conversion occurs solely in DC mode, avoiding additional losses from AC inversion and re-conversion to DC, thus reducing energy losses from multiple current and voltage conversions. The system’s round-trip efficiency (RTE) can improve by up to 2%.

In large grid-connected projects, the simplicity of the DC coupling system compared to AC coupling systems leads to savings on storage inverters and medium-voltage cabinets. Fewer components not only mean lower initial investment costs but also reduced maintenance workload, resulting in higher returns for customers.

Accelerating Green Power Trading

In the volatile environment of the electricity spot market, where market prices and load demands change rapidly, energy storage systems must possess high flexibility and responsiveness to maximize their value. The Sigen Zero Carbon Park solar storage system deeply integrates artificial intelligence with big data analysis and machine learning algorithms. This enables the solar storage system to manage photovoltaic generation, energy storage, and grid interactions flexibly, optimizing the timing of battery charging and discharging in real-time to generate the best energy solutions, minimizing electricity costs, and improving operational efficiency of storage systems. This adaptability allows for seamless integration with dynamic pricing, virtual power plants, and various complex demands, providing users with the most intelligent energy experience.

Battery Pack-Level Safety Protection Ensures Storage Safety

Regarding battery safety, the Sigen storage system employs a battery pack-level safety protection scheme that includes sensors, active fire modules, high-temperature insulation pads, insulation layers, explosion-proof valves, and smoke detection devices. This six-fold safety measure can promptly detect thermal runaway in battery cells, with a response time over 60 seconds faster than traditional solutions. Additionally, there is an independent fire protection device for every 12kWh, ensuring comprehensive system safety. In contrast, traditional storage systems often allow thermal runaway to lead to widespread fires, affecting larger areas and having slower fire protection response times.

Maintenance-Free Design with 24/7 Monitoring

The innovative solar storage solution from Sigen features an IP66 fully sealed design that guarantees system stability and safety without maintenance. In comparison, traditional solutions only achieve an IP55 rating, having more vulnerable components that require monthly inspections and biannual replacement, along with comprehensive annual maintenance. Moreover, the modular design of Sigen storage solutions allows for module replacement in just two hours, significantly enhancing system reliability, whereas traditional containerized storage systems can take over two days for fault repair. The Sigen solution also offers comprehensive monitoring from automatic equipment diagnostics to remote automated inspections, further optimizing intelligent operation and maintenance management.

Efficient Installation and Deployment for Solar Storage Systems

The Sigen solar storage solution not only excels in performance but also leads significantly in installation efficiency compared to traditional solutions. Thanks to its modular design and stackable installation process, the installation procedure is greatly simplified, requiring no cranes or concrete foundations, allowing for the setup of a single system in under one hour. Furthermore, the pioneering fully networked communication enhances the communication speed several-fold compared to traditional RS485 systems, supporting device self-identification and system self-organization, enabling system debugging in just 15 minutes. Conversely, traditional solutions require specialized installation equipment and take around eight hours for a single system setup, significantly increasing waiting times and installation costs for users.

Sigen Zero Carbon Home: Setting New Standards in Household Energy Management

For household and small commercial applications, the Sigen Zero Carbon Home solution integrates photovoltaic inverters, storage converters, storage batteries, DC charging modules, and energy management systems. The SigenStor solar storage all-in-one machine 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, it has received high acclaim from exhibition attendees.

Moving forward, Sigen will continue to focus on technological innovation and product optimization, expanding the application boundaries of solar storage integration, providing more efficient and reliable green energy solutions for various industries, and contributing to the development of a new power system that accelerates the transition towards a low-carbon, efficient, and intelligent energy framework.