Selection: 4 x 240kWh Lithium Battery Energy Storage Systems.
Rationale: Each energy storage system provides 240kWh capacity. To meet the total requirement of 840kWh during 3 hours of peak demand (including efficiency losses), we selected four such systems, totaling 960kWh. This configuration ensures stable and continuous auxiliary power supply even during high-demand periods.
Charging Power: Each system offers a charging power of 125kW, allowing efficient energy absorption from the grid during off-peak hours for storage in the batteries.
Advantages: Lithium batteries are ideal for this application due to their high energy density, long lifespan, and rapid response capabilities. They can withstand frequent charge and discharge cycles while maintaining high efficiency, making them perfect for high-demand scenarios.
Selection: 125kW Power Conversion System (PCS) with Integrated MPPT.
Rationale: The PCS is configured at 125kW to match the charging and discharging requirements of each energy storage system, ensuring efficient interaction with the grid. This configuration supports optimal power flow management, enhancing overall system performance.
Integrated Solar MPPT Function: Each battery system includes a 60kW Maximum Power Point Tracking (MPPT) function for solar energy, allowing direct energy input from the solar array without additional conversion equipment. This integration simplifies system architecture and enhances operational efficiency.
Advantages: The integrated PCS with MPPT not only maximizes the use of renewable energy but also reduces system complexity and maintenance costs, making it a highly efficient and cost-effective solution.
Selection: Estand Integrated Unit with 240kW Dual-Gun Charger.
Rationale: Each Estand unit is equipped with a 240kW dual-gun charger, capable of simultaneously providing high-speed charging services to two electric vehicles. This configuration ensures that the charging needs of multiple guests are met efficiently.
Advantages: The high-power output combined with the dual-gun design offers a fast and efficient charging experience, maximizing the utilization of each charging station and meeting the high demand of hotel customers.
Battery Storage System | |||||
| Battery Capacity(kWh) | Battery Charging Rate | Battery Discharge Rate | Battery Efficiency | Battery Module IP Rating | Battery Cooling System |
| 480*2 | ≤0.5C | ≤0.8C | ≥97% | IP65 | Liquid-cooling |
AC Output | |||||
| Rated AC Output Power(kW) | Max. AC Output Power(kVA) | Rated Output Voltage(Vac) | Output Voltage Range(Vac) | Rated Grid Frequency(Hz) | Max. Output Current(A) |
|
250*2 |
275 |
480 |
-15%~10%(settable) | 60(settable) | 330.8 |
Charging System | |||||
| Charging Voltage(Vdc) | Charging Efficiency | Connctors | Power Distribution | Charging Power(kW) | Cable |
| 150~1000* | 95% (peak) | 4 | 2 connectors intelligent distribution | 240 per charger | 400A, 5m, CCS |
| *Constant power from 300~1000 | |||||
The interconnected management of battery modules allows for flexible energy allocation, ensuring efficient power utilization and balanced distribution across the system.
Equipped with a built-in smart energy management system, the solution adjusts charging and discharging strategies based on real-time electricity price signals, prioritizing charging from the grid during low-cost periods.
This solution integrates a battery energy storage system that intelligently absorbs energy from the grid and solar system during off-peak hours, storing it for use during peak demand periods. This approach effectively smooths the power demand curve, reducing instantaneous power demand on the grid.
This intelligent and coordinated operation improves the overall utilization and lifespan of the battery modules, while also enhancing the system’s response speed and flexibility to meet diverse charging needs in different scenarios.
By prioritizing charging during low electricity price periods, the system significantly reduces charging costs, enhancing the economic efficiency of the charging stations and saving customers on electricity bills.
By lowering peak power demand, the system eases the load on the grid, avoiding the high costs associated with grid upgrades while enhancing overall grid stability.
