Project Introduction
Project Name: Deployment of a 522 kWh BESS combined with a kWp Solar System at an electric vehicle charging station.
Location: Ba Hien, Phu Tho Province, Vietnam.
Implementation Time: November 2025.
Implementing Unit: GG Industries.
2. Project Objectives
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Stabilize charging capacity at the EV charging station during peak hours.
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Increase the efficiency of energy utilization from the rooftop solar system.
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Reduce electricity costs by storing energy and using it during off-peak periods.
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Support grid load reduction in the surrounding area and improve operational reliability.
3. Key Technical Specifications
| Category | Details |
|---|---|
| System Capacity | 522 kWh |
| Battery Type | Li-ion (LFP) |
| PCS | 125 kW |
| Features | Bidirectional charging/discharging, smart management via EMS |
| Monitoring System | Remote monitoring through IoT platform |
| Safety Protections | Integrated BMS, fire and explosion protection, short-circuit protection, overvoltage protection |
4. Challenges & Solutions
Challenges:
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Large fluctuations in EV charging loads, creating pressure on the local power grid.
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Integration with the existing solar rooftop system.
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Limited capacity of the medium-voltage distribution lines in the area.
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Requirement to ensure absolute safety when integrating battery storage with DC fast-charging systems.
Solutions:
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Optimize the design of the distributed energy storage system.
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Integrate an Energy Management System (EMS) to intelligently coordinate power flows.
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Install remote monitoring and early-warning systems for battery and equipment health.
5. Achieved Results
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Reduced operating costs by up to 25% by utilizing off-peak electricity through energy storage.
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Ensured 100% stable charging capacity during peak hours without any service interruptions.
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Reduced grid load by approximately 150 kW during peak periods.
