LSG-H Brushless Submersible Solar Pump

Model Interpretation:
L: Vertical/Centrifugal.
S: Deep Well/Submersible.
G: High Head/Pipeline.
-H: High Configuration/High Performance.

Core Form: Long-barrel multi-stage centrifugal submersible pump.
Core Difference: The biggest difference between it and surface pumps (LHF/LZSU) is that it must operate submerged in water. The LSG-H series is usually designed to be relatively slender (such as 3-inch, 4-inch diameter) to fit the narrow space of standard boreholes.
Core Working Principle: Multi-stage centrifugal submersible + DC brushless drive
The working logic of the LSG-H series is "deep water strong pumping":
Submersible operation (no suction head limitation):
Because the pump body is completely submerged in water, it is not limited by atmospheric pressure and can easily pump water from the bottom of wells tens or even hundreds of meters deep.
Multi-stage pressurization:
Multiple impellers are connected in series inside the pump. The motor drives the impellers to rotate at high speed. Water enters from the bottom of the pump, and after being pressurized by each impeller, the pressure is layered and superimposed, and finally discharged from the outlet at a very high head.
DC brushless direct drive:
Uses a permanent magnet DC brushless motor (BLDC), which is extremely efficient. For submersible pumps, high efficiency means low heat generation, and water itself is the best coolant, which allows it to operate stably underwater for a long time.
Core Features: High head, stainless steel material, quiet operation

Feature Detailed Description
High Head Capability Core advantage. The LSG-H series is designed for deep wells, with a head range typically between 30 meters and 150 meters. It can easily meet the needs of deep well water extraction and water supply for high-rise buildings.
All Stainless Steel/Corrosion Resistant To adapt to the complex chemical environment underground, its pump body, impeller, and shaft core are usually made of 304 stainless steel or copper alloy. This not only prevents rust but also ensures the cleanliness of the water quality.
Quiet Operation The motor is completely submerged in water, and the water acts as a natural sound and vibration dampener. Almost no sound is heard on the ground during operation, and vibration is minimal.
Automatic Protection Usually built-in overheat protection and overload protection. If the well water level drops, causing the pump body to be exposed above the water surface, the temperature sensor will trigger a shutdown to prevent dry running.

Typical Application Scenarios
The LSG-H series is a mainstay for deep well water extraction, household water supply, and agricultural irrigation:
Deep Well Groundwater Extraction:
Suitable for deep wells with depths between 20 and 100 meters. This is its core application scenario.
Household/Villa Water Supply:
Used to pump deep well water to rooftop water tanks for household washing, showering, and drinking.
Greenhouse/Orchard Drip Irrigation:
In mountainous or flat areas, its high head is used to extract water from deep wells for precise irrigation of crops.
Livestock Farming Water Supply:
Used in automatic drinking water systems for large-scale farms.

Selection and Usage Recommendations
Matching Well Diameter:
The LSG-H series has a slender design. When selecting a model, you must confirm that the diameter of your well (e.g., 3 inches, 4 inches) is greater than the outer diameter of the pump. If the well is too small, the pump cannot be lowered; if the well is too large, the pump is prone to swinging and hitting the well wall.
Balance of Flow Rate and Head:
With a fixed well depth, a higher flow rate requires higher power. If the well is very deep but the flow rate requirement is high, you may need to choose a higher power model (e.g., 1.5HP, 2HP).
Cable Configuration:
A special submersible cable (waterproof and tensile) is required. As the well depth increases, it is recommended to use a thicker cable (e.g., 2.5 square or 4 square) to reduce voltage loss.
Water Quality Requirements:
Although made of stainless steel, to prevent sand from wearing down the impeller, it is recommended to wrap a filter screen around the pump's inlet and ensure that the sand content in the well water is within the allowable range (usually <0.01%).

The LSG-H series is the "deep water expert" among solar water pumps. If your well is relatively deep, and surface pumps cannot draw water, or you need to pump water from the well stably for a long time, the LSG-H series is a more reliable and efficient choice than surface pumps. It is the "standard configuration" for deep well users.