4LSC Permanent Magnet Brushless Plastic Solar Pump

The model designation of the 4LSC typically means the following:
4: Represents a pump body diameter of 4 inches (approximately 100mm), meaning it needs to be installed in a deep well with a larger diameter.
L: Vertical.
S: Deep well submersible.
C: Centrifugal.

Core Components:
It usually consists of a brushless DC motor (BLDC), a 201/304 stainless steel pump body, and engineering plastic impellers. To adapt to the instability of solar power supply, these pumps usually have a built-in MPPT (Maximum Power Point Tracking) controller, which automatically adjusts the operating power according to the intensity of sunlight.
Core Working Principle:
Its principle is still based on centrifugal force, but with a larger size:
Energy Acquisition: Solar panels convert light energy into direct current.
High-Speed ​​Rotation: The current drives the motor to rotate at high speed.
Centrifugal Water Discharge: As a "multi-stage centrifugal pump," the motor drives multiple plastic impellers working in series. After water enters the pump body, it is thrown outwards by the high-speed rotating impellers through centrifugal force.  Guided by the diffuser casing, the pressure is increased step by step, and finally discharged from the outlet.
Core Features: High flow rate, high head, economical and durable

Feature Detailed Description
High Flow Rate & High Head Compared to the 3LSC series, the 4LSC has a larger impeller diameter and wider flow channels. It can meet the needs of deep wells (high head) and provide a large flow rate of several tons per hour, suitable for slightly larger-scale water usage scenarios.
Advantages of Plastic Impellers  Uses wear-resistant engineering plastic impellers, which are lightweight, corrosion-resistant, and rust-proof. Due to their light weight, the starting torque is small, making them very suitable for solar power, which is dependent on weather conditions.
Only Suitable for Clean Water  Important reminder. The hardness of plastic impellers is not as high as metal. If the well water contains sand and quartz particles, the plastic impellers will be quickly worn down, leading to a decrease in flow rate or even complete failure.
High Cost-Effectiveness Compared to stainless steel impeller pumps of the same specifications (such as the 4LSS series), the 4LSC series has a lower cost and a more affordable price.

Typical Application Scenarios
The 4LSC series is the main equipment for centralized water supply in small and medium-sized farms, orchards, and villages:
Large-scale agricultural irrigation:
Suitable for sprinkler or drip irrigation systems in large fields and orchards, as it can provide a continuous large volume of water.
Centralized water supply for villages or communities:
Extracting groundwater from deep wells to supply domestic water for dozens of households.
Fish pond/shrimp pond water replenishment and circulation:
Fish ponds usually require large-flow water changes, and the water quality is relatively clear, making the 4LSC ideal.
Industrial cleaning and cooling:
Using solar energy for industrial water transportation that does not require high precision.

Selection and Usage Precautions
Well diameter requirements:
The 4LSC series has a diameter of approximately 100mm. Your well diameter must be greater than 100mm (usually 110mm or more is recommended) for smooth installation.
Water quality filtration:
Since plastic impellers are used, they must be protected. It is recommended to install a filter screen at the pump's inlet and ensure that the well water has a very low sand content.
Power matching:
The 4LSC series usually has a high power rating (commonly 1.5kW-3kW or even higher), so you need to configure a sufficient area of ​​solar panels.
For example: A 2kW 4LSC pump usually requires a 2.5kW-3kW solar panel array to ensure it can start even in the morning or on cloudy days.
Submergence depth:
Although it is a deep well pump, ensure that the pump body is submerged at least 1 meter below the dynamic water level to ensure motor heat dissipation and prevent cavitation.

If you need to draw water from a deep well and require a large volume of water (such as for irrigation or supplying a small village), and the well water is very clean, then the 4LSC series plastic impeller solar pump is the most cost-effective choice. It's like a "strongman," working efficiently and saving money, but the premise is that you must provide it with clean water.