When choosing a brushless DC water pump model, you need to consider the following key factors:

1. Flow rate requirements:

- According to the actual water demand of the application scenario, select a brushless DC water pump with an appropriate flow rate level. Generally speaking, the larger the flow rate, the higher the pump power.

- You can check the rated flow index in the product parameters to ensure that the water demand of the application scenario is met.

2. Head requirements:

- The head refers to the maximum height to which the pump can pump water. Different application scenarios have different requirements for the head, such as high-rise buildings require higher heads.

- When choosing, you should ensure that the head index of the brushless DC water pump can meet the needs of the application scenario.

3. Voltage requirements:

- Brushless DC water pumps usually work at 12V or 24V DC voltage. You need to choose a suitable model according to the actual power supply voltage.

- If you have high requirements for voltage fluctuations, you can choose a brushless DC water pump with voltage conversion function.

4. Power consumption and efficiency:

- The lower the power consumption and the higher the efficiency of the brushless DC water pump, the more energy-saving and environmentally friendly it is. You can compare the power parameters and efficiency indicators of different models.

- For some energy-sensitive applications, such as solar power supply systems, high-efficiency and energy-saving brushless DC water pumps will be more suitable.

5. Installation size:

- The size and installation interface of the brushless DC water pump need to match the space and connection method of the application scenario.

- You can check the product's external dimensions and installation hole spacing and other parameters to ensure smooth installation.

Combining the above key factors with actual application needs, choosing the appropriate brushless DC water pump model can not only meet performance requirements, but also achieve energy saving and reliability goals.