Case Share for A Cold Storage Warehouse 3MWH BESS With 800KW PV

Configuration List:
- 1 set of 500KW PCS
- Isolation transformer 1 set 500KW (380V-480V)
- MPPT controller 400KW * 2 set
- EMS+STS cut-off switch 1 set
- 3010KWH battery system set
- 2 set of 20 feet customized container

Photovoltaic power is prioritized for loads, with excess power used to charge the battery. In the event of a mains power outage, the system seamlessly switches to the grid, where the ESS system supplies power to the load.

When the battery SOC is low and photovoltaic power is insufficient, mains power takes over to supply the load. In case of another mains power failure, the system initiates the diesel generator to ensure continuous power supply.

Lithium battery energy storage systems (BESS) are increasingly being adopted in cold storage facilities to improve energy efficiency, reduce operational costs, and enhance overall performance. Here’s an overview of their key features and benefits:

1. Working Principle

• Energy Storage: Lithium batteries store energy during off-peak hours when electricity rates are lower.

• Energy Discharge: During peak demand, the stored energy is released to power refrigeration and cooling systems, reducing reliance on the grid.

2. System Components

• Lithium Batteries: High-capacity batteries that provide efficient energy storage with a long cycle life.

• Inverters: Convert stored DC power from batteries into AC power for use in refrigeration systems.

• Energy Management System (EMS): Monitors energy usage and optimizes battery charging and discharging based on demand and rates.

3. Advantages

• High Efficiency: Lithium batteries have a high round-trip efficiency, minimizing energy losses during storage and discharge.

• Cost Savings: Reduces electricity bills by shifting energy consumption to lower-cost periods.

• Scalability: Systems can be easily scaled up or down based on the facility's needs.

• Reduced Carbon Footprint: By optimizing energy use, these systems contribute to lower greenhouse gas emissions.

4. Applications

• Food Storage: Ensures the safe cooling and preservation of perishable goods in warehouses and supermarkets.

• Industrial Processes: Provides necessary cooling for manufacturing processes that require precise temperature control.

• HVAC Systems: Supports temperature regulation in large buildings by supplying backup power to cooling systems.

5. Challenges

• Initial Costs: The upfront investment for lithium battery systems can be significant, although it can lead to long-term savings.

• Battery Lifespan: While lithium batteries have a long cycle life, they eventually degrade, necessitating replacement.

• Technical Expertise: Requires skilled personnel for installation, maintenance, and optimization.