• Dagong ESS

Grid-Connected and Off-Grid Operation of Industrial & Commercial ESS

The Role of ESS in Modern Energy Management

In today’s evolving industrial and commercial energy landscape, energy storage systems (ESS) have emerged as a vital component in achieving operational efficiency and power stability. Whether operating in grid-connected or off-grid modes, ESS solutions are revolutionizing how energy is stored, distributed, and utilized across diverse industries.

Grid-Connected Operation: Supporting the Grid and Earning Revenue

In grid-connected scenarios, Industrial & Commercial ESS systems work in tandem with the utility grid to store electricity during off-peak hours and discharge it during peak demand periods. This process not only reduces operational costs for businesses but also helps utilities manage load fluctuations and improve grid reliability.

The heart of this system lies in the inverter, which converts the DC power stored in the battery into AC power suitable for grid use. Sophisticated control systems ensure that the ESS meets grid synchronization and quality standards. For example, in a manufacturing plant, the ESS can charge at night when energy rates are lower and discharge during the day when energy costs are higher, effectively cutting down peak demand charges and even participating in grid ancillary services markets.

Off-Grid Operation: Ensuring Autonomy in Remote Areas

Off-grid operation allows Industrial & Commercial ESS to function independently of the power grid, which is especially important for remote areas or locations with unstable grid connections. In such cases, ESS serves as a standalone power supply, ensuring uninterrupted operation of critical equipment and systems.

For instance, a mining facility in a remote region can use an off-grid ESS powered by solar PV and batteries to maintain 24/7 operations. These systems require intelligent energy management to balance load demands with energy availability. The inverter must support a variety of electrical loads, and the battery management system must monitor the state of charge to protect battery health and ensure long-term system performance.

Addressing the Challenges of Grid-Connected and Off-Grid Systems

Despite their advantages, both grid-connected and off-grid ESS operations face technical and logistical challenges. Grid-connected systems must manage synchronization, reactive power, and potential voltage fluctuations. In off-grid mode, limitations in battery capacity, unpredictable renewable energy input, and the absence of grid backup necessitate advanced forecasting and redundancy planning.

Fortunately, many of these challenges are being addressed through continual technological improvements in battery chemistry, inverter design, and system-level energy management.

Dagong ESS: Providing Tailored Solutions for Diverse Applications

As a leading manufacturer of energy storage systems, Dagong ESS specializes in delivering high-performance solutions for both grid-connected and off-grid industrial and commercial applications. With a strong R&D team and extensive experience, Dagong ESS offers customized products ranging from household storage systems (5–80kWh) to industrial-grade liquid-cooled and air-cooled storage cabinets (100–215kWh).

Dagong ESS products are designed to comply with international grid standards and offer robust adaptability for off-grid deployments. Their systems feature intelligent battery management, modular design for easy scalability, and advanced safety mechanisms to ensure reliable long-term performance. Whether it’s stabilizing power in a factory or energizing a remote telecom base station, Dagong ESS provides flexible and efficient solutions tailored to client needs worldwide.

Dagong ESS Products Showcase

Here are a few of our cutting-edge energy storage solutions:

3.35MWh Liquid-Cooled Container Energy Storage System：The 3.35MWh Liquid-Cooled Energy Storage Container is a high-performance energy storage solution featuring Lithium Iron Phosphate (LiFePO4) batteries, known for their safety and reliability. With a rated capacity of 3.35MWh at 25℃ and 0.5P, and a rated power of 1.5MW, it is designed for large-scale energy storage applications. The system operates within a voltage range of 1040~1497V and can function in temperatures ranging from -20℃ to 60℃. It boasts an IP54 protection rating, ensuring durability in various environments. The container offers exceptional cycle performance, supporting over 8000 cycles at 70% State of Health (SOH), and has a service life of more than 15 years with one charge per day.

5MWh Air-Cooled Container Energy Storage System:The 5MWh Air-Cooled Energy Storage Container (DHFL5MWh-2.5MW-2h) is a modular solution for industrial and commercial use. Featuring Lithium Iron Phosphate (LFP) batteries, it delivers 5MWh capacity and 2.5MW power within a 1000~1440V range, operating reliably in -20 to 60℃. Its industrial air cooling, perfluoroacetone fire suppression, IP54 protection, and C3 anti-corrosion ensure safety and durability. Supporting Ethernet communication and 360~440V grid voltage, it is ideal for peak shaving, grid stabilization, and renewable energy storage.

100kWh to 144kWh Air-Cooled Energy Storage System: Dagong ESS 100kWh to 144kWh Air-cooled Energy Storage System cabinet is a high-performance energy storage system using LFP batteries. It offers capacities up to 144kWh and power options up to 50kW, with a built-in hybrid inverter supporting both solar (PV) and grid (AC) charging. Designed for industrial and commercial use, it features wide voltage and temperature ranges, IP54 protection, and industrial cooling, ensuring reliable power in various environments.

215kWh to 241kWh Air-Cooled Energy Storage System: The 215kWh to 241kWh Air-Cooled Energy Storage System is a reliable and high-performance energy storage solution for industrial and commercial use. Its modular design with CTP technology ensures easy transport, installation, and maintenance. The system supports parallel expansion, real-time monitoring, and fault recording. With over 8,000 cycles (70% SOH) and a lifespan of 15+ years, it guarantees long-term reliability. CE, UN38.3, MSDS, and 3C certified for safety and compliance.

215kWh Liquid-Cooled Energy Storage System: The 215kWh Liquid-Cooled Energy Storage System is a reliable, efficient solution for industrial and commercial use. It features easy transport, installation, and maintenance, with real-time monitoring and fault logging. The modular design, CTP technology, and parallel expansion provide flexibility, while multiple safety protections ensure reliability. With over 8,000 cycles (70% SOH) and a 15+ year lifespan, it offers long-term performance.

372kWh Liquid-Cooled Energy Storage System: The 372kWh Liquid-Cooled Energy Storage System is an efficient, reliable solution for industrial and commercial use. It features easy transport, installation, and maintenance, with real-time monitoring and fault recording. Its modular design and CTP technology enable flexible expansion. With robust safety protections, over 8,000 cycles (70% SOH), and a 15+ year lifespan (one charge per day), it ensures long-term performance.

The Future of Industrial & Commercial ESS

As global energy systems transition toward renewable and distributed generation, the demand for reliable and flexible energy storage solutions continues to grow. Industrial & Commercial ESS, particularly those capable of operating in both grid-connected and off-grid modes, are set to play a pivotal role in this transformation.

With companies like Dagong ESS leading the charge through innovation and customization, the integration of ESS into industrial and commercial infrastructures will not only enhance energy resilience but also accelerate the global shift toward a more sustainable energy future.