3/4 in DC Screw Solar Submersible Pump — SAB Series

Efficient solar screw pump engineered for stable off-grid water lifting with practical flow and high-head performance. Designed for solar-powered borehole systems, it provides a reliable solution for agricultural irrigation, livestock watering, household supply and remote installations where simple operation and energy efficiency are important.

Applications

Solar-powered borehole water supply and irrigation.

Operating Conditions

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

Motor / System Information

Brushless DC solar pump system.

Spu : SOL-SAB

Overview

Overview

Product Information

Product Name	3/4 in DC Screw Solar Submersible Pump — SAB Series
Series	3SAB / 4SAB
Voltage	24–96V DC; best input 20–200V
Power	400–1000 W
Flow	3–6.8 m³/h
Head	30–115 m
Outlet	1–1¼ in
Model Options	3SAB3.0-30/24-300 through 4SAB6.8-70/96-1000.

3"/4" DC SCREW SOLAR PUMP

Model	DC Volt	Best Input Voltage Voc	Power	Max.Flow	Max.Head	Outlet
Model	(V)	(V)	(W)	(m³/h)	(m)	(inch)
3SAB3.0-30/24-300	24	20-50	300	3.0	30	i
3SAB3.0-45/48-400	48	50-90	400	3.0	45	i
3SAB3.6-60/72-600	72	60-135	600	3.6	60
4SAB3.6-50/48-400	48	45-90	400	3.6	50	1%"
4SAB3.6-75/72-600	72	60-135	600	3.6	75	1%"
4SAB3.8-95/72-750	72	60-135	750	3.8	95	17%"
4SAB4.2-115/96-1000	96	80-200	1000	4.2	115	1%"
4SAB6.2-40/72-600	72	60-135	600	6.2	40	17%"
4SAB6.8-50/72-750	72	60-135	750	6.8	50	114"

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Key Features

Ultra-Slim 3/4-Inch Design: The pump's narrow diameter allows it to be installed in small-diameter boreholes and deep wells where larger submersible pumps cannot fit, vastly increasing its application potential.

Progressive Cavity Screw Mechanism: This positive displacement technology ensures a steady, high-pressure flow and provides excellent tolerance for sandy water, ensuring reliable performance in challenging well conditions.

Brushless DC Permanent Magnet Motor: Offers high energy efficiency, a long operational lifespan due to the absence of brushes, and the ability to start under low-light conditions, maximizing daily water yield from solar panels.

Direct DC Solar Operation: Designed to connect directly to a DC power source, such as a solar photovoltaic array, eliminating the need for an AC inverter. This simplifies the system, reduces energy loss, and lowers overall costs.

Robust & Corrosion-Resistant Construction: Built with durable materials, including a stainless steel shaft and wear-resistant components, to withstand the abrasive and corrosive nature of well water for long-term reliability.

Integrated Protection Systems: The pump system often includes built-in protection against dry running, over-voltage, and under-voltage, safeguarding the motor and ensuring stable, worry-free operation.

Low Maintenance & High Reliability: The combination of a brushless motor and a simple, robust screw pump design results in a system with very few wearing parts, leading to minimal maintenance requirements and reduced lifetime costs.

Advantages

1. Unmatched Versatility for Narrow Wells
The most significant commercial advantage of the SAB series is its 3/4-inch diameter. This feature opens up a massive market of existing narrow boreholes that were previously unsuitable for efficient solar submersible pumps. For distributors and installers, this means you can offer a solar solution to a much wider range of customers without the high cost and disruption of drilling a new, wider well.

2. Superior Performance in Sandy Water Conditions
Many well water sources contain sand and other fine particulates that can quickly erode and damage standard centrifugal pumps. The progressive cavity design of the screw pump is inherently more tolerant of these abrasive materials. This translates to fewer service calls, lower warranty claims, and higher customer satisfaction, as the pump continues to operate reliably where others might fail.

3. Maximized Energy Harvest and Water Output
The high efficiency of the brushless DC motor, combined with direct DC coupling, ensures that the maximum amount of solar energy is converted into water. The pump's ability to operate at lower irradiance levels means it starts earlier in the morning and runs later in the afternoon. This extends the effective pumping window, delivering more water per day from the same solar array compared to less efficient systems.

4. Drastically Reduced Total Cost of Ownership (TCO)
While the initial investment in a solar pump system is a key consideration, the total cost of ownership is where the SAB series truly shines. With zero fuel costs, minimal maintenance requirements (no oil changes, no brush replacements), and a long service life, the operational expenditure (OPEX) is near zero. This provides an exceptionally fast return on investment (ROI) for the end-user, making it a highly attractive financial proposition.

5. Simplified System Design and Installation
The direct DC connection eliminates the need for a separate AC inverter, which is a common point of failure in other solar pump systems. This "plug-and-play" simplicity reduces the number of components, lowers the initial system cost, and makes installation faster and easier for technicians, even in remote areas. This reliability and simplicity are key selling points for any B2B partner.

FAQ

Q1: What is the main advantage of a screw pump over a centrifugal pump?
A: The primary advantage is its performance in high-head and sandy water conditions. As a positive displacement pump, the screw pump maintains a more consistent flow rate against varying pressure and is much more tolerant of abrasive particles like sand, which can quickly damage the impellers of a centrifugal pump.

Q2: Can this 3/4-inch pump fit in my existing borehole?
A: The SAB series is designed for boreholes with an inner diameter of 1 inch (25mm) or larger. It is crucial to measure your well casing's inner diameter before purchasing to ensure a proper fit. Its slim profile is its key feature, allowing it to fit where most other submersible pumps cannot.

Q3: Do I need a controller for this solar pump?
A: Yes, a solar pump controller is essential. It acts as the brain of the system, regulating the power from the solar panels to the pump motor. It provides critical protection features like dry-run protection, over-voltage, and under-voltage protection, and often includes Maximum Power Point Tracking (MPPT) to optimize the pump's performance.

Q4: How does the pump handle low sunlight or cloudy days?
A: The high-efficiency brushless DC motor allows the pump to operate at lower power inputs than traditional motors. This means it can start earlier in the morning, run later in the evening, and continue to pump water, albeit at a reduced flow rate, during periods of partial cloud cover.

Q5: What kind of maintenance does the SAB series pump require?
A: One of the key benefits of this pump is its low maintenance design. The brushless motor has no brushes to replace. Under normal operating conditions, the pump is designed to be a "fit and forget" solution. Periodic checks of the solar panels and electrical connections are recommended, but the pump itself requires minimal intervention.

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.