Question 1

What is the specific battery cell configuration inside the 261kWh cabinet?

Accepted Answer

The battery cluster uses a 1P260S configuration. It consists of 5 individual battery PACKs, each with a capacity of 52.2kWh (configured as 1P52S). The total number of cells is 260.

Question 2

What are the cycle life specifications for this energy storage system?

Accepted Answer

According to the test standards, the system is rated for 6,000 cycles under the following conditions: 25(degrees Celsius) ambient temperature, 0.5P charge/discharge rate, 90% Depth of Discharge (DOD), with 70% capacity retention at End of Life (EOL).

Question 3

Does the system support off-grid (islanded) operation?

Accepted Answer

Yes. The integrated PCS supports off-grid operation.The AC output voltage is 400V (-15%~+15%),frequency is 50Hz,and the output voltage distortion rate is no more than 3%.

Question 4

What is the communication architecture of the BMS?

Accepted Answer

The BMS adopts a two-level architecture. The BMU (Slave) communicates via Daisy Chain within the battery pack, while the BCMU (Master) communicates with external devices using CAN, RS485, and Ethernet protocols.

Question 5

What are the overheating protection measures for the battery?

Accepted Answer

The system uses a liquid cooling method for the battery compartment. The optimal cycle temperature is 30(degrees Celsius), and the temperature difference between cells is controlled within 5(degrees Celsius). If the temperature exceeds safe limits, the BMS will trigger alarms and protective actions.

Question 6

What certifications do the core components comply with?

Accepted Answer

The system adheres to the latest Chinese national standards (GB/T). Specifically: Battery: GB/T 36276-2023, BMS: GB/T 34131-2023, PCS: GB/T 34120-2023.

Question 7

What is the maximum allowable altitude for installation?

Accepted Answer

The standard allowable altitude is 2000m. For installations above 2000m, the system will operate at a derated capacity to ensure safety and performance.

Question 8

What is the rated charge/discharge rate (C-rate) of the battery?

Accepted Answer

The rated charge and discharge rate is 0.5P, which translates to a 2-hour charge or discharge cycle (2C/2D).

Question 9

What types of detectors are installed in the fire protection system?

Accepted Answer

The system is equipped with temperature detectors, smoke detectors, and H2 (Hydrogen) detectors to monitor the internal environment of the cabinet in real-time.

Question 10

What is the efficiency of the PCS (Power Conversion System)?

Accepted Answer

The maximum conversion efficiency of the PCS is Greater than or equal to 98.5(degrees Celsius). It features a three-level topology and supports bidirectional energy flow between the grid and the battery.

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