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BESS - ESU625
Containerised Battery Energy Storage System
The ESU625kw/1200kWh is a containerised Battery Energy Storage System designed for hybrid, off-grid and grid-connected power systems. It is suited to sites with variable demand and higher energy requirements, helping improve power stability, reduce diesel genset reliance, and enable more controlled energy management across medium-scale operations.
20FT Containerised Battery Energy Storage System
A mid-scale containerised BESS designed to improve power control and energy efficiency across variable industrial loads.
- Reduces diesel genset runtime and inefficient load cycling
- Improves power stability across fluctuating site demand
- Supports hybrid power systems integrating diesel gensets and solar PV
- Enables off-grid and grid-connected and microgrid operation
- Can be pre-configured within defined power and battery capacity ranges to match site‑specific energy demand.
- Containerised design simplifies transport, installation and relocation
Product Features
The ESU625W/1200kWh provides a balanced combination of storage capacity and power control, supporting stable operation across dynamic site conditions.
The system can be pre-configured within defined power and battery capacity ranges, allowing the solution to be right‑sized to site‑specific energy and load requirements. This reduces unnecessary infrastructure, simplifies installation and lowers ongoing operating costs, while ensuring stable, efficient power in harsh and remote environments.
- High-capacity energy storage: Designed to manage larger and more variable load profiles while maintaining consistent system performance.
- Hybrid and microgrid compatibility: Designed for integration into hybrid power systems, including diesel-solar and grid-supported configurations.
- Smart features: Bidirectional PCS integration. Actively controls energy flow between battery storage, diesel gensets, solar PV, and site loads to maintain system balance.
- Remote monitoring and diagnostics: Enables visibility of performance, system status, and fault conditions through standard communication interfaces.
- Reliable & safe: Utilises LFP battery technology supported by a multi-layer Battery Management System (BMS), thermal management, and integrated fire safety measures.
- Durable & compliant with AS: Built tough for Australian conditions, the IP54-rated enclosure is designed for operation in harsh and remote site conditions. All units are certified to Australian standards.
- Scalable modular design: Supports efficient installation, maintenance, and potential expansion as site requirements evolve.
- Containerised system: Delivered in a 20FT container, enabling efficient mobilisation and deployment across remote sites.
The ESU625-1200 stores energy generated on site and releases it in response to changing demand conditions. Through its integrated bidirectional Power Conversion System (PCS), the system manages energy exchange between the battery, diesel gensets, solar PV, and connected loads.
As site demand fluctuates, the system absorbs excess generation or supplies additional power to meet short-term peaks. This reduces generator load variability and limits inefficient operating conditions such as low-load running.
Within a hybrid power system, the ESU625-1200 functions as a central balancing component, improving voltage and frequency stability while enabling more consistent use of available energy sources. This results in smoother system performance and improved operational control.
Typical Applications of Containerised BESS
- Medium-scale mining operations and civil & infrastructure projects
- Hybrid microgrids
- Industrial and utility power support
- Temporary and semi-permanent site power systems
Fuelfix BESS in Action
Real-World Operations
EuropeA containerised energy storage system was installed to increase solar PV utilisation within an existing power setup. Storing excess solar generation during low demand periods and discharging it when required, the system reduces reliance on external energy sources and improves energy efficiency.
This configuration reflects how containerised BESS can be applied in hybrid environments, including Australian mining and infrastructure sites, where integrating solar PV with diesel gensets requires stable, responsive energy management.
Real-World Operations
Based on SCU project data — view full case studyA containerised battery energy storage system was deployed at a chicken manure treatment plant to manage energy costs under variable electricity tariffs. It charges off‑peak and discharges during peak demand, shifting up to 1.2MWh per cycle to improve efficiency.
This configuration reflects how containerised BESS can support Australian mining, infrastructure and industrial sites by reducing peak demand, improving energy control and stabilising power systems.
Frequently Asked Questions
What type of sites is the ESU625‑1200 designed for?
The ESU625‑1200 is designed for mid‑scale operations with variable electrical loads and ongoing energy optimisation requirements. It suits sites that need more capacity and control than compact systems can provide.
How does the ESU625‑1200 support hybrid power systems?
The system acts as an energy buffer between generators, renewable inputs, and site demand. This helps stabilise power delivery and reduces reliance on continuous generator operation.
How does this system handle fluctuating load profiles?
Energy is stored during periods of lower demand and released as loads increase. This smooths load variation and supports consistent power quality across the site.
Is the ESU625‑1200 suitable for permanent installations?
Yes. Its containerised design supports long‑term deployment while allowing for relocation or system changes if site requirements evolve.
How is system performance monitored?
The system supports remote monitoring and diagnostics through standard communication interfaces, providing visibility into operating status and performance trends.
