Solar Water Well Pump System

Solar Well Pump Overview

The solar-powered deep well pump is an efficient, eco-friendly, and energy-saving water extraction solution, ideal for various scene requiring groundwater extraction from deep wells. It converts solar energy into electrical energy through solar panels. This energy is then transmitted to the motor of the deep well pump via a controller, which powers the motor and drives the impeller to rotate. As a result, water is drawn from the well and delivered to the desired location. Equipped with a high-efficiency brushless motor, it is suitable for a wide range of applications, including agriculture irrigation, livestock watering, and domestic water supply in off-grid areas.

Topology of Solar Powered Well Pump System

Diagrams of Popular Solar Well Pumping System Installs

Pumping into pressure tank

To maintain 24-hour pressure, batteries and a reverse action pressure switch are utilized. The pressure switch is connected to the VEICHI controller. Once the pump fills the pressure tank to the desired psi, the well pump is turned off. When there's a pressure drop (due to an open valve or timer), the pressure switch activates the pump to refill the tank and maintain the pressure. The table below indicates which VEICHI pump systems are ideal for well pump pressure. Generally, as the head increases (e.g., deeper well, higher pressure, steeper hill), the volume a pump can produce typically decreases along its pump curve.

Pumping into Storage + Booster Pump

Another widely-used method involves installing a battery-powered booster pump to pressurize the water from a storage tank. This pump features an integrated pressure switch that automatically turns the pump off when valves or timers are closed, and back on when the valves open. The battery for this booster pump can be charged either using a solar panel with a charge controller or a standard AC battery charger.

Pumping into Elevated Tank

This setup is the easiest way to achieve 24-hour water pressure for irrigation purposes (provided you have some elevation on your property). Run plumbing from the well pipe to your elevated tank, and install a check valve on the pump to prevent water from siphoning back down into the well from the tank. For every 2.31 feet of elevation the tank has above your plants, you get 1 psi of pressure. To supply drip lines, you need a minimum of 20 psi, which corresponds to a tank elevation of 45 feet. For sprinklers, you require 45 psi, which means the tank should be elevated by 100 feet.

Features of Solar Deep Well Water Pump

• NSK bearing
• Efficient PMSM brushless motor (PMSM: Permanent Magnet Synchronous Motor)
•  Motor: IP68.
• Advanced fluid technology.
• Mechanical seal of silicon carbide/graphite composites ensures long service life and reliable operation.
• 180°C high-temperature resistant copper wire with Class F insulation.
• Cold-rolled silicon steel stator and rotor.
• 38SH NdFeB magnet with high-temperature resistance up to 150°C.
• Food-grade white mineral oil.
• Oil reservoir structure balances internal/external pressure, enabling pump submersion depth up to 120m.
• Premium angular contact bearings withstand high axial loads, are compatible with all hydraulic types, and offer extended service life.

Features of MPPT Solar Well Water Pump Inverter

• Plug & play, easy installation & low installation cost.
• High efficiency with MPPT function.
• Specially designed for solar pumping system.
• Easy operation & Low maintenance cost.
• Protection class: IPSS.

Multi Functions of DC Solar Well Pump Controller

• MPPT for higher solar power utilization rate.
• Real time working condition on LED screen: output power, output voltage, current, pump speed and error code.
• Auto frequency conversion: auto adjustment the speed/rpm according to solar power strength except for manual adjustment. Auto On/Off (with float switch ).
• Soft start:  impulse current-free to protect pump motor.
• No water hammer to protect the whole plumbing system.
• Multi-protections: protection against dry-run, over-voltage , over-current, high-temperature (reduce rpm when the inner temperature reaches 79°C), and output phase loss.

Multi Functions of MPPT AC/DC Solar Well Pump Inverter

• Can be used for both AC and DC power supply.
• Protection class: lP55.
• Ambient temperature:-15~60℃.
• LED Displays working conditions & Fault code.
• Auto Start & Stop.
• Soft start & VFD function.

Applications for Solar Powered Deep Well Water Pump

Agricultural Irrigation, Farming / Crop Cultivation

Solar water pumps are ideal for agricultural irrigation in remote areas with limited access to electricity. They provide a sustainable and cost-effective solution to deliver water to crops, fields, and orchards using solar energy. Those solar submersible pumps are commonly used to draw water from wells or reservoirs for farming. They support consistent water supply for rice fields, vegetable plots, and greenhouses, helping farmers increase yields sustainably.

Livestock Watering

Solar water pumps are an excellent solution for providing consistent and reliable water sources to livestock in remote areas where grid power is unavailable or unstable. Solar-powered livestock watering systems can reduce manual labor, eliminate fuel costs, and require minimal maintenance. Many ranchers use solar well pumps or DC powered water pumps to draw water from deep wells or boreholes directly to troughs or storage tanks.

Domestic Water Supply

In off-grid rural homes or remote villages, solar water pumps offer a sustainable and dependable solution for everyday water needs. Whether it's drawing water from a deep well for drinking, showering, laundry, or gardening, solar submersible pumps and well pumps can be installed with minimal infrastructure. These systems are especially beneficial in areas with limited or unreliable electricity, empowering families with access to safe and consistent water.

Solar Well Pump Packaging Display

Deep Well Pump System Accessories List

Head Calculation for Deep Well Pump

Calculation: Rated Head ＞ H1 + H2 + (10% x L)
L: Horizontal distance of water delivery. (m)
H2: Tank height and additional lift if available. (m)
H1: Lift from lowest water level to ground. (m)
Water source: Borehole (diameter mm)

Depends on the customer's daily water needs. (The daily illumination time is 6H)
By calculating the required head and flow, you can ensure that your solar water pump system will efficiently meet your water delivery needs.

Solar Panels Calculation for Solar Well Water Pump

It's recommended that the solar panel has a power rating 1.3 -1.5 times greater than the water pump's power. Additionally, ensure the voltage of the solar array matches the voltage requirements of the water pump.

For example:

VEICHI DC Solar Water Pump
Power: 750W
Optimum input voltage: 90-120V
Maximum open circuit voltage: 160V

Recommended solar panel power ≥1.3*750w (power≥975w)
VMP(voltage at max) voltage >90v
VOC voltage <160v

Solar panels

• Power 330 watts
• VMP voltage 37.26v
• VOC voltage 45.64v

3 solar panels connected in series

• Power 330w*3=990w

• VMP voltage 37.26v*3=111.78v

• VOC voltage 45.64v*3=136.92v

In this case, the power and voltage requirements of the water pump can be met, so this solar PV panel array solution is acceptable.

Comparing the Costs and Benefits of Solar Water Pumps vs. Traditional Pumps

Solar Water Pump System Manufacturer Since 2005

As a professional manufacturer of solar water pump systems, VEICHI offers high-efficiency solutions that are specifically designed to maximize the utilization of solar energy. These systems are ideal for powering water pumps in a variety of applications, such as agricultural irrigation, livestock watering, and domestic water supply in off-grid areas.

With a presence in 85 countries worldwide, VEICHI solar pumping solutions have been successfully implemented across Africa, the Middle East, Southeast Asia, South Asia, and the Americas. We have successfully implemented our solar pumping solutions at 760,000 application sites worldwide, showcasing our extensive experience and global reach.

We regularly hold online and offline seminars to empower local agents with technical knowledge, enabling them to provide better localized services.