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Solar Submersible Water Pump Manufacturer

Deye Solar pump is an eco-friendly and cost-effective water pumping system powered by solar energy. By converting sunlight into electricity through photovoltaic (PV) panels and Deye Solar pump controller. Deye Solar pumps provide a reliable and sustainable solution for water supply needs, be widely used for agricultural irrigation, livestock watering, drinking water supply, and industrial applications, particularly in remote or off-grid areas. 
With the development of Solar industry, Solar system cost become lower. Deye Solar pumps keep low operational costs while delivering water, reducing high cost cause dependence on conventional energy sources.  Solar pumping is increasingly becoming one of the most popular and attractive ways of supplying water in the world today, especially widely used in many areas where electricity is lacking or the grid is unstable, or conventional energy is high-cost.  

About Deye
Zhejiang Deye Electrical Appliances Co., Ltd.
Since its establishment in 1990, Deye Group has been dedicated to the research, development, and manufacturing of submersible pumps and pump controllers. We are built on a foundation of precision engineering and a commitment to manufacturing excellence.
At Deye, advanced production technologies and stringent quality control processes are integrated into every stage of manufacturing. This disciplined approach, supported by our team of dedicated engineers, ensures that every submersible pump, pool pump, and controller we deliver meets the highest standards of performance, durability, and reliability.
We go beyond manufacturing pumps; we build trust. Deye Group is a China DC Solar Water Pump Factory and Solar Submersible Water Pump Manufacturer, committed to providing stable, efficient, and intelligent water system solutions for global users, striving to be your trusted long-term partner.
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  • Deye Variable Frequency - Invention - ZL201710749042.9 - Method for Dry Pump Protection of Centrifugal Water Pumps
  • Deye Variable Frequency - Invention - ZL201710749043.3 - A novel method for determining water shortage in a sensorless constant pressure water supply system
  • Deye Variable Frequency - Invention - ZL2018112826985 - A Variable Frequency Control System for Deep Well Pumps
  • Deye Variable Frequency - Utility Model - ZL201721302864.4 - A highly versatile backpack-type variable frequency drive fixing device
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Solar Submersible Pump Industry Knowledge

1. What Is a Solar Submersible Pump

A solar submersible pump is a sealed pump unit designed to operate fully submerged in water, powered by photovoltaic (PV) solar panels. The motor and pump body are housed in a single watertight assembly that is lowered directly into a borehole, well, or tank. Electrical power is supplied from the surface via a submersible cable connected to a solar pump controller.

Unlike surface pumps, which rely on suction to draw water upward, a submersible pump pushes water upward from below, enabling it to operate at significantly greater depths with higher efficiency. This design is particularly well suited to off-grid water extraction where grid power is unavailable or unreliable.

Deye Group has specialized in the design and manufacture of submersible pumps since 1990, applying precision engineering and rigorous quality control to deliver products suited for diverse global applications.

2. Core Components of a Solar Submersible Pump System

  • PV Solar Panels: Convert sunlight into DC electrical energy to power the pump system.
  • Solar Pump Controller: Regulates power conversion using MPPT and VFD technology, provides motor protection, and may support hybrid grid/solar input.
  • Submersible Pump Motor: Either a DC brushless motor or a 3-phase AC induction motor sealed within the pump housing.
  • Pump Stage Assembly: One or more impeller stages that pressurize water and force it upward through the delivery pipe.
  • Submersible Cable: Water-resistant cable carrying power from the controller at the surface down to the motor.
  • Discharge Pipe and Check Valve: Conveys water to the surface; the check valve prevents backflow when the pump stops.
  • Water Storage Tank (optional): Stores pumped water for use during nighttime or low-irradiance periods, reducing the need for battery backup.

3. Types of Solar Submersible Pumps

3.1 By Motor Type

Motor Type Power Input Characteristics Common Power Range
DC Brushless Motor DC from PV directly No brushes, lower maintenance, compact design 0.1 to 3 kW
3-Phase AC Induction Motor AC from solar inverter controller Robust, widely serviceable, suitable for high power 0.75 to 75 kW and above

3.2 By Borehole Diameter

Solar submersible pumps are manufactured in standard outer diameters to fit common borehole sizes. The most widely used are 4-inch (100 mm) and 6-inch (150 mm) diameter units. Larger diameters such as 8-inch and 10-inch are available for high-flow industrial applications.

3.3 By Head Range

  • Shallow well (under 30 m): Domestic water supply, garden irrigation, livestock watering.
  • Medium depth (30 to 100 m): Village water supply, small-scale agricultural irrigation.
  • Deep borehole (above 100 m): Large-scale irrigation projects, municipal groundwater extraction, industrial water supply.

4. Key Performance Parameters

Parameter Description
Flow Rate (Q) Volume of water delivered per hour (m3/h) or per minute (L/min) at rated conditions
Total Head (H) Sum of vertical lift, pipe friction losses, and discharge pressure, measured in meters
Motor Power (kW) Rated shaft power input to the pump under design operating conditions
Pump Efficiency (%) Ratio of hydraulic power output to mechanical power input; higher values reduce required PV capacity
Max Submersion Depth (m) Rated depth to which the pump unit can be safely lowered
Sand Content Tolerance Maximum allowable sand or sediment content in the pumped water, typically expressed in g/m3
Motor Insulation Class Thermal classification of motor winding insulation; Class F (155 degrees C) is standard for submersible pumps

5. Application Scenarios

  • Agricultural Irrigation: Groundwater extraction for drip, sprinkler, or flood irrigation in areas without grid power access.
  • Rural Drinking Water Supply: Solar borehole pumps provide communities in remote areas with reliable access to clean groundwater.
  • Livestock Watering: Automated water supply to troughs and tanks for cattle, sheep, and other livestock in pastoral areas.
  • Aquaculture: Water circulation and replenishment in fish ponds and shrimp farms where continuous water flow is required.
  • Humanitarian and Development Projects: International development organizations deploy solar submersible pump systems in sub-Saharan Africa, South Asia, and Latin America as part of clean water access programs.
  • Industrial Water Supply: Process water for manufacturing, construction site dewatering, and mine water management using high-capacity deep-well systems.

6. Solar Submersible Pump vs. Surface Solar Pump

Criteria Solar Submersible Pump Surface Solar Pump
Installation Location Submerged in well, borehole, or tank Mounted above ground near water source
Maximum Practical Head 200 m or more (multi-stage) Typically under 25 m suction head
Priming Requirement None (self-priming by design) Required before startup
Noise Level Low (motor submerged in water) Higher (motor exposed above ground)
Maintenance Access Requires extraction from well Directly accessible at surface
Suitable Water Source Boreholes, deep wells, tanks Rivers, ponds, open reservoirs

7. Material and Construction Standards

The materials used in a submersible pump directly affect corrosion resistance, service life, and suitability for different water chemistries. Common materials include:

  • 304 or 316 Stainless Steel: Used for pump bodies, impellers, and motor casings where corrosion resistance is required. 316 grade offers superior resistance in saline or brackish water conditions.
  • Noryl or Engineering Plastics: Used for impellers in light-duty or cost-sensitive applications; resistant to chemical corrosion but limited in abrasive environments.
  • Carbon Ceramic Bearings: Water-lubricated bearings that replace oil-lubricated designs, eliminating risk of oil contamination in potable water applications.
  • Motor Winding Insulation: Submersible motor windings use Class F or Class H insulation materials rated to withstand prolonged exposure to moisture and elevated temperatures.

Deye Group applies stringent material selection and quality inspection at each manufacturing stage to ensure long-term performance in demanding field conditions.

8. Frequently Asked Questions

Q1: Can a solar submersible pump run without a controller?

No. Direct connection of a submersible pump to a PV array without a controller exposes the motor to unregulated voltage and current fluctuations, which can cause overheating, winding damage, and dry-run failure. A dedicated solar pump controller with MPPT and motor protection functions is required for safe and efficient operation.

Q2: What is the effect of sand and sediment on a submersible pump?

Excessive sand content accelerates wear on impellers and pump seals, shortening service life. When pumping from sandy boreholes, selecting a pump with stainless steel impellers and a sand tolerance rating appropriate for the water source is important. A sand separator or settling tank can also reduce ingested particle load.

Q3: How deep can a solar submersible pump be installed?

The maximum installation depth is determined by the pump's rated submersion depth specification and the length of the submersible cable. Most standard units are rated for submersion depths between 50 m and 200 m. The total dynamic head (installation depth plus pipe losses) must remain within the pump's rated head range for proper operation.

Q4: Is a battery required for a solar submersible pump system?

A battery is not required in most installations. The standard approach is to pump water during daylight hours into an elevated storage tank, which then supplies water by gravity at any time. For applications requiring nighttime pumping, battery storage or grid hybrid controllers can be used.

Q5: How is a solar submersible pump extracted for maintenance?

The pump is retrieved by pulling the safety rope or discharge pipe that supports it in the borehole. The submersible cable is coiled and managed separately during extraction. Proper installation with a rated safety rope is essential to prevent the pump from becoming unrecoverable at the bottom of a borehole.

Deye Group | Established 1990 | Submersible Pumps, Pool Pumps and Pump Controllers

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