Powering the Future: A Deep Dive into Off-Grid and Hybrid Energy Storage

The Importance of Energy Storage System

Advanced energy storage systems（EES）play an increasingly important role in modern energy infrastructure. They act like a "reservoir" in the energy sector, storing excess electricity when demand is low and releasing it during peak demand. This helps balance supply and demand, ensuring the stability and reliability of power supply.

To address the energy demand challenges in different regions, ATESS delivers two main energy supply and power system configurations: off-grid energy storage systems and hybrid energy storage systems.

Off-grid Energy Storage Systems

An off-grid energy storage system can operate independently of an external power grid. It generates electricity using renewable energy devices such as solar panels and wind turbines and stores this energy in storage devices like battery packs to meet local power demands.

Applications of Off-grid Energy Storage Systems

Remote Area Power Supply

In remote areas such as mountains, islands, and deserts, the coverage of the national power grid is limited, and the cost of connection is high. Off-grid energy storage systems can provide a stable power supply to these areas, supporting local residents' lives, economic development, and infrastructure construction.

Agricultural Production:

In agricultural production, off-grid energy storage systems can provide stable and reliable power support for irrigation systems, farm processing facilities, cold storage, and more.

Micro-grid Systems 

With off-grid energy storage systems, microgrids can achieve self-sufficiency and stable power supply by relying on their own renewable energy generation and energy storage devices, even when disconnected from the external power grid.

Hybrid Energy Storage Systems

The hybrid solar power system integrates multiple energy storage technologies to enhance the efficiency of energy storage and usage.

Features of Hybrid Energy Storage Systems

Dual Power Supply and High Flexibility 

Hybrid energy storage systems can draw power from multiple energy sources, including renewable energy and the traditional grid. This capability provides the system with high flexibility and adaptability when facing fluctuations in energy supply.

Economic Benefits

By optimizing energy distribution and reducing energy wastage, hybrid energy storage systems are able to decrease energy costs. Furthermore, they can generate additional economic revenue for businesses by participating in power market services such as frequency regulation and peak shaving.

Reliability

The hybrid energy storage systems feature a redundant design, which enables the energy storage devices to provide necessary backup power in case of grid failures or unstable renewable energy supplies, ensuring the continuous operation of critical loads and reducing losses caused by power outages.

Applications of Hybrid Energy Storage Systems

Areas with Frequent Power Outages

In areas with unreliable power grids or frequent power failures, hybrid energy storage systems act as reliable backup power sources, ensuring continuous and stable electricity for essential equipment and services.

Industrial and Commercial Parks with Insufficient Grid Capacity

For industrial and commercial areas where grid capacity is insufficient to handle increasing electricity needs, hybrid energy storage systems can store energy at off-peak and release it during peak demand. This helps alleviate grid pressure and ensures a stable power supply.

Uninterrupted Power Supply for Critical Loads

For places with crucial loads, such as data centers and hospitals, hybrid energy storage systems can rapidly respond and adjust the charging and discharging strategies of various energy storage media, ensuring the continuous operation of critical businesses without interruption.

Case Sharing 

The Lucky Star brand of Oceana Group has been a trusted choice for South African families since 1959. In response to Oceana Group's goals of sustainable development and efficiency enhancement, ATESS has meticulously designed a highly flexible energy storage system for Lucky Star's newly built meat cannery.

The 500kWp solar panel array installed on the cannery's roof provides electricity for factory operations during the day and charges the battery pack during periods of low power demand. The 2.5MWh LiFePO4 battery system can store excess solar energy, with a discharge depth of up to 90%, ensuring continuous operation of the factory even in the event of a power grid outage. The inverter system supports rapid switching between grid-connected and off-grid modes, with a switch time of only 0ms, further safeguarding the continuity and stability of production activities.