DC Solar Submersible Pump — SQXL / SQXS / SWQT Series

Robust DC solar submersible pump range designed for drainage, high-flow water transfer and agricultural irrigation. Multiple pump structures, outlet sizes and capacity options support applications from compact dewatering to larger farm systems, providing buyers with flexible off-grid solutions for varied operating conditions.

Applications

Solar drainage, water transfer and irrigation.

Operating Conditions

Use with a compatible controller and the stated input-voltage range.

Motor / System Information

Brushless DC solar submersible pump system.

Spu : SOL-SQXL

Overview

Overview

Product Information

Product Name	DC Solar Submersible Pump — SQXL / SQXS / SWQT Series
Series	SQXL / SQXS / SWQT
Voltage	24–192V DC; best input 18–430V
Power	300–1500 W
Flow	5.6–45 m³/h
Head	9–30 m
Outlet	1–3 in
Model Options	SQXL5.6 through SQXL38; SQXS6 through SQXS25; SWQT22 through SWQT45.

DC SOLAR SUBMERSIBLE PUMP

Model	DC Volt	Best Input Voltage Voc	Power	Max.Flow	Max.Head	Outlet
Model	(V)	(V)	(W)	(m³/h)	(m)	(inch)
SQXL5.6-20/48-400	48	45-100	400	5.6	20	i
SQXL6.5-25/72-600	72	60-150	600	6.5	25	1
SQXL6.5-30/96-750	96	80-200	750	6.5	30	a."
SQXL2-15/48-400	48	45-100	400	2	15	2
SQXL14.6-20/72-600	72	60-150	600	14.6	20	a
SQXL14.6-25/96-750	96	80-200	750	14.6	25	Zz
SQXL17-30/96-900	96	80-200	900	17	30	ZA
SQXL35-9/96-750	96	80-200	750	35	9	oe
SQXL38-11/96-900	96	80-200	900	38	11	a
SQXS6-15/24-300	24	18-50	300	6	15	1
SQXS6-15/48-300	48	45-100	300	6	15	1"
SQXS15-20/48-600	48	45-100	600	15	20
SQXS25-10/72-600	72	60-150	600	25	10	rs i
SQXS25-12/96-750	96	80-200	750	25	12	oS.
SWQT22-10/96-750	96	80-200	750	22	10	a
SWQT25-15/144-1100	144	100-340	1100	25	15	2
SWQT26-20/192-1500	192	100-430	1500	26	20	2
SWQT40-10/144-1100	144	100-340	1100	40	10	3
SWQT45-12/192-1500	192	100-430	1500	45	12	3

Detail / Structure Image

Solar Pump_3_1x1_full.png

Key Features

Direct DC Drive System: Operates directly on DC power (typically 48V to 110V DC range), removing the need for external inverters and reducing system complexity and cost.

Brushless Permanent Magnet Motor: High-efficiency motor technology that provides superior torque and energy conversion. It runs cooler and quieter than traditional motors, extending service life.

Multistage Hydraulic Design: Engineered for high-head applications, capable of lifting water from deep boreholes (up to 100m+ depending on the model) for irrigation and domestic supply.

MPPT Controller Integration: Compatible with MPPT (Maximum Power Point Tracking) controllers to optimize solar energy harvesting, ensuring the pump runs at its best efficiency point regardless of sunlight intensity.

Robust Construction: Built with stainless steel shafts and corrosion-resistant materials to withstand submerged operation in various water qualities.

Dry Run Protection: Advanced models include sensors or controller logic to detect low water levels, automatically shutting down the pump to prevent damage from running dry.

Easy Installation: The "plug and play" nature of the DC connection simplifies installation, making it accessible for technicians in remote areas without specialized electrical training.

Advantages

1. Zero Operational Energy Costs
The primary commercial driver for the DC Solar Submersible Pump is the reduction of OPEX. By replacing diesel generators or grid electricity with free solar energy, users can achieve a return on investment (ROI) typically within 1-2 years. For agricultural projects, this means water is essentially free after the initial hardware installation.

2. Reduced Maintenance Overhead
Diesel pumps require constant fuel, oil changes, and filter replacements. AC pumps with inverters have complex electronics that can fail. The SQXL/SQXS/SWQT series uses a brushless motor with no carbon brushes to replace. The hermetically sealed design protects the motor from water ingress, resulting in a "fit and forget" reliability that is highly valued in remote locations.

3. Scalability and Modularity
For B2B system integrators, this product offers flexibility. The system can be scaled by adding more solar panels or connecting pumps in parallel (with proper controller sizing). This modularity allows you to design systems ranging from small livestock trough fillers to large-scale farm irrigation networks using the same core technology.

4. Environmental Compliance
Many government tenders and NGO projects now mandate low-carbon solutions. This pump series aligns with global sustainability goals (SDGs), making it an eligible product for green energy subsidies and environmental grants. It produces zero noise pollution and zero emissions, making it suitable for eco-sensitive areas.

5. Superior Hydraulic Efficiency
The integration of the motor and pump hydraulics is optimized at the factory. Unlike generic AC motors adapted for solar use, these dedicated DC pumps are tuned to match the IV curve of solar panels. This ensures that the pump utilizes available sunlight more effectively, pumping more water per watt of solar panel installed compared to conventional AC solar pump systems.

FAQ

Q1: What is the difference between the SQXL, SQXS, and SWQT series?
A: While all are DC Solar Submersible Pumps, the differences usually lie in the hydraulic design (impeller type), material construction (stainless steel vs. cast iron), and diameter (suitable for different borehole sizes). The SWQT series often refers to specific high-efficiency models, while SQXL/SQXS might denote standard deep well variations. Please check the specific datasheet for the diameter and material details.

Q2: Do I need a battery for this pump?
A: No, batteries are not strictly necessary. The pump is designed to run directly from solar panels during the day. We recommend pumping water into a storage tank during the day for use at night. However, if you require night operation, a battery bank and a specific battery-compatible controller can be added to the system.

Q3: Can this pump run on AC power if I connect a generator?
A: Standard DC solar pumps are designed for DC input. To run them on AC power (grid or generator), you would need a rectifier to convert AC to DC, or you should consider our "Hybrid Solar Pump" series which accepts both AC and DC inputs natively.

Q4: How deep can the pump be submerged?
A: Most models in this series are rated for submersion depths of up to 5 to 30 meters, depending on the specific model's sealing and cable length. Always ensure the pump is fully submerged during operation to allow for proper motor cooling.

Q5: What happens if the well runs dry?
A: If the system is equipped with a controller with dry-run protection (standard on most modern solar pump controllers), the pump will automatically detect the lack of water (via current sensing or external probes) and shut down to prevent overheating and damage. It will typically attempt to restart automatically after a set period.

Applications

Township Municipal Water Supply

Mini automatic booster pumps solve low water pressure for villages, small towns and community centralized water supply pipe networks. Matching small fans are available for auxiliary ventilation of municipal pump rooms.

Family Farm & Garden Irrigation

Small self-priming pumps & stainless steel deep well submersible pumps support farm irrigation, garden watering and mountain village domestic water intake.

Industrial Cooling & Circulation

Mini circulation pumps provide stable liquid circulation & cooling for small processing workshops, boiler and solar hot water systems. Auxiliary fans can be matched for workshop air circulation.