Innovative DC Coupling Architecture Redefines Solar Energy Storage Systems by Sigen New Energy

Digital Energy Network – Commercial and Industrial Energy Storage Systems – Sigen New Energy Introduces Innovative DC Coupling Architecture to Redefine Solar Storage Systems

On April 10, Sigen New Energy launched a fully modular solar-storage integration solution in Beijing, showcasing its advantages in solar-storage fusion, high integration, flexible deployment, and AI intelligence. This initiative supports the new phase of high-quality development in the new energy sector.

As new energy prices enter a fully market-oriented stage, the energy storage industry is evolving from traditional supportive infrastructure to a critical component of the new power system. It plays a vital role in ensuring energy security and promoting low-carbon transformation. Sigen New Energy has keenly identified this significant opportunity, continuously advancing an intelligent solar-storage integration system that covers all scenarios, providing robust support for achieving carbon-neutral goals.

The Sigen Zero Carbon Park solution includes a series of commercial and industrial inverters (50kW-125kW) and modular storage systems, suitable for various settings such as industrial parks, commercial centers, data centers, and ground installations. The inverters are designed with storage interfaces, allowing easy adaptation to pure solar, pure storage, or combined solar-storage modes, enabling users to configure according to their actual needs.

Reassessing Energy Storage Value Amid Price Fluctuations

In this market-oriented pricing era, the volatility of new energy prices will increase significantly, making the adjustment capability and intelligence of storage systems increasingly important. The Sigen commercial solar-storage system supports a “charge and discharge as needed” feature. With its proprietary Energy Management System (EMS) and Battery Management System (BMS), combined with artificial intelligence applications, it can achieve millisecond-level data collection and response. The system automatically adjusts charging and discharging strategies based on real-time changes in electricity prices and load demands, prioritizing storage when prices are low and discharging during peak prices to help users adopt an economic strategy of “buy low, use high” or “buy low, sell high,” significantly enhancing storage returns.

The Sigen Zero Carbon Park employs a fully modular design, greatly facilitating maintenance and spare parts management throughout the lifecycle of the energy station. Each module has a capacity of 12kWh and supports flexible configurations from 50kWh to 100MWh, allowing customization based on actual storage needs. The commercial inverters have pre-reserved storage interfaces, supporting the installation of solar panels before or after storage systems, effectively reducing initial investment and operating costs, and truly unlocking the value potential of storage in the market-oriented power era.

Maximizing Solar Power Utilization

The innovative DC coupling architecture from Sigen Zero Carbon Park can automatically adjust storage strategies based on current power supply and demand. When there is surplus solar generation, the system prioritizes storing excess energy in batteries. Conversely, when electricity demand exceeds solar capacity, it quickly draws power from the batteries. This dynamic management model maximizes solar generation utilization, significantly improving self-consumption rates while reducing reliance on the grid and effectively lowering electricity costs. The DC coupling architecture allows for a capacity ratio of up to 2, enabling efficient storage of excess direct current energy during peak sunlight hours without requiring AC conversion, significantly enhancing overall system efficiency and energy utilization, thereby increasing the proportion of green energy used by enterprises.

Furthermore, the DC coupling architecture increases the cycle efficiency of the solar-storage system, as energy conversion only occurs in the DC state during the charging process, avoiding additional losses from AC inversion and subsequent DC conversion, which can improve round-trip efficiency (RTE) by up to 2%. In large-scale grid-connected projects, DC coupling systems are simpler than AC coupling systems, saving on storage inverters and medium-voltage cabinets. This reduction in equipment leads to lower initial investment costs and less maintenance workload, providing higher returns for customers.

Accelerating Green Power Trading

In the volatile environment of the electricity spot market, where market prices and load demands fluctuate rapidly, energy storage systems must possess high flexibility and responsiveness to fully realize their value. The Sigen Zero Carbon Park solar-storage system deeply integrates artificial intelligence, leveraging big data analytics and machine learning algorithms. This allows for flexible management of solar generation, storage, and grid interaction, automatically optimizing the timing of battery charging and discharging. It generates real-time optimal energy solutions, minimizing electricity costs and enhancing the operational efficiency of energy storage systems, easily adapting to dynamic pricing, virtual power plants, and other complex scenarios, providing users with the most intelligent energy experience.

Battery-Level Safety Protection

Regarding battery safety, the Sigen storage system implements battery pack-level safety protection. This includes six layers of safety measures such as sensors, active firefighting modules, high-temperature insulation pads, insulated thermal layers, explosion relief valves, and smoke detection devices. 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 dedicated fire protection device for every 12kWh, ensuring comprehensive safety for the system. In contrast, traditional storage systems often face fire risks that can spread throughout the entire system during thermal runaway, with slower response times for fire protection devices, making timely containment difficult.

Maintenance-Free Design with 24/7 Monitoring

The innovative Sigen solar-storage solution features an IP66-rated fully sealed design, ensuring system stability and safety without the need for maintenance. In comparison, traditional solutions typically achieve only IP55 ratings, with more vulnerable components requiring monthly inspections, semi-annual replacements, and annual comprehensive maintenance. The modular design of Sigen storage solutions allows for module replacement in just two hours, significantly enhancing system reliability compared to traditional containerized systems, which can take over two days for fault repairs. Sigen’s solutions also offer complete oversight from automatic device diagnostics to remote automated inspections, further optimizing intelligent operation and maintenance management.

Efficient Installation and Deployment

The Sigen solar-storage solution not only excels in performance but also significantly outpaces traditional solutions in installation efficiency. Its modular design and stackable installation greatly simplify the installation process, eliminating the need for cranes or concrete foundations. A single system can be installed in under one hour. The innovative all-network communication method drastically increases communication speed compared to traditional RS485 communication, supporting device self-identification and system self-networking, which can be completed in 15 minutes. In contrast, traditional solutions require specialized installation equipment and can take up to eight hours for a single system installation, greatly increasing user wait times and installation costs.

Sigen Zero Carbon Home: Setting a New Benchmark for Home Energy Management

For residential and small commercial applications, the Sigen Zero Carbon Home solution integrates solar inverters, storage inverters, storage batteries, DC charging modules, and energy management systems. It features the SigenStor solar-storage integrated machine, supporting 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 attendees at exhibitions.

Looking ahead, Sigen will continue to focus on technological innovation and product optimization, expanding the application boundaries of solar-storage integration. The company aims to provide more efficient and reliable green energy solutions for various industries, contributing to the construction of a new power system and accelerating the transition of the energy system towards a low-carbon, efficient, and intelligent future.