3LSC Plastic Impeller Oil-Cooled Solar Submersible Pump

3LSC typically stands for:
3: Pump body diameter is 3 inches (approximately 76mm), suitable for small-diameter deep wells.
L: Vertical.
S: Submersible.
C: Centrifugal.

Core Features:
Structure: Adopts a multi-stage centrifugal pump structure.
Impeller Material: Engineering plastic (usually wear-resistant and corrosion-resistant modified plastic).
Drive: Brushless DC motor (BLDC), usually with a built-in MPPT controller.
Core Working Principle: Centrifugal force + Solar energy
Its working principle is the same as the "centrifugal pump" we discussed earlier, but the power source is solar energy:
Photoelectric conversion: Solar panels convert light energy into DC electricity.
Driving the motor: The current drives the brushless DC motor to rotate at high speed.
Centrifugal water pumping: The motor drives the plastic impeller to rotate at high speed, and the water is thrown to the outer edge of the impeller under the action of centrifugal force. Through the superposition of multiple impellers, high pressure is formed and the water is transported upwards.
Core Characteristics: Lightweight, low cost, high speed

Feature Detailed Description
Lightweight and low cost The biggest difference. Compared with stainless steel impellers, plastic impellers are extremely lightweight and have low processing costs, so the price of the entire pump is usually cheaper than stainless steel impeller pumps of the same specifications (3LSS).
Corrosion resistant and rust-proof Plastic impellers are inherently corrosion-resistant and will never rust like cast iron, making them suitable for conveying weakly acidic or alkaline liquids or drinking water.
Suitable for clean water A fatal weakness. The hardness of plastic impellers is not as good as stainless steel. If the water contains sand and particles, the plastic impeller will be quickly worn out. Therefore, it is only suitable for clean water wells.
High-speed operation Plastic impeller centrifugal pumps usually operate at extremely high speeds, and the flow rate is very large when there is sufficient solar power.

Typical Application Scenarios
The 3LSC series is synonymous with "cost-effectiveness" and "clean water," and is mainly used in:
Agricultural sprinkler and drip irrigation:
Used for sprinkler irrigation of farmland and orchards. Because sprinkler irrigation has relatively low requirements for water quality (not as stringent as drinking water), and the flow rate demand is large, the high cost-effectiveness advantage of 3LSC is obvious. Household Water Use:
If your well water is very clear (well-filtered with sand and gravel), using it for washing vegetables, laundry, and flushing toilets is a more cost-effective option than the 3LSS.
Livestock Watering:
Suitable for supplying water to livestock farms, as long as the water does not contain hard particles that could wear down the impeller.
Landscape Fountains:
Directly powered by solar energy, eliminating the need for electrical wiring.

Selection and Usage Recommendations
Strictly Differentiate Water Quality:
Choose 3LSC (plastic impeller): For clear well water with almost no sand.
Choose 3LSS (stainless steel impeller/screw): For turbid well water with high sand content, or for pumping river water (containing impurities).
Voltage Matching:
The 3LSC series usually has a wide voltage range (DC 24V-96V or even higher). You need to choose a pump voltage that matches your solar panel configuration (series or parallel).
Prevent Dry Running (although there is protection, try to avoid it):
Although solar pumps usually have dry-running protection, prolonged dry running will shorten the lifespan of the plastic impeller (because there is no water cooling).  It is recommended to use it with a float switch.

If you prioritize cost-effectiveness and your well water is very clean, the 3LSC series plastic impeller solar pump is your best partner. It's as economical and affordable as a "fast-moving consumer good"; however, if your well water is somewhat turbid, don't be tempted by the lower price, otherwise replacing the pump due to impeller wear will be more expensive.