Using solar power to power a three-phase AC pump

Posted on 5th Feb 2024

Darwin Motion Drive

Harnessing solar energy to power a 3-phase AC pump involves the use of a solar photovoltaic (PV) system to generate electricity and an inverter to convert the DC (direct current) produced by the solar panels into the AC (alternating current) required by the pump. Darwin Motion (servo drive manufacturers) a general overview of the components and steps involved in setting up a solar-powered 3-phase AC pump system:


Solar Panels:

Photovoltaic panels are used to capture sunlight and convert it into DC electricity. The number and capacity of the panels depend on the power requirements of the pump and the local solar conditions.

Mounting Structure:

Solar panels are typically mounted on structures such as rooftops, ground mounts, or tracking systems to optimize their exposure to sunlight.

Charge Controller:

A charge controller regulates the voltage and current from the solar panels to prevent overcharging of batteries (if used) and to ensure a stable power supply to the pump.


An inverter is required to convert the DC electricity generated by the solar panels into the 3-phase AC power required by the pump. Choose an inverter with the appropriate capacity and compatibility with the pump's motor.

Batteries (Optional):

In some systems, batteries may be included to store excess energy generated during sunny periods. This stored energy can then be used during periods of low sunlight or at night.

3-Phase AC Pump:

Select a pump that operates on 3-phase AC power. The pump's specifications should match the output of the solar inverter.

Wiring and Electrical Components:

Proper wiring, switches, and electrical protection devices are essential to connect the solar panels, charge controller, inverter, batteries (if used), and pump.

Monitoring and Control System:

Implement a monitoring system to keep track of the performance of the solar PV system. This may include measuring power output, battery status (if applicable), and system efficiency.

Installation Steps:

Site Assessment:

Evaluate the site to determine the optimal location for solar panels, considering factors such as sunlight exposure, shading, and mounting options.

Solar Panel Installation:

Install the solar panels on the mounting structure, ensuring proper alignment and orientation to maximize sunlight capture.

Electrical Wiring:

Connect the solar panels to the charge controller, and then connect the charge controller to the inverter. Ensure proper wiring and electrical connections.

Inverter Installation:

Install and configure the inverter to convert DC power from the solar panels into 3-phase AC power suitable for the pump.

Connect Pump:

Connect the 3-phase AC pump to the output of the inverter. Ensure that the pump is compatible with the inverter's output specifications.

Battery Installation (Optional):

If using batteries, connect them to the system to store excess energy for later use.

Testing and Commissioning:

Test the entire system to ensure proper functionality. Check for any issues in the wiring, connections, or component compatibility.

Monitoring System Setup:

Set up a monitoring system to keep track of the solar PV system's performance, including energy production, battery status, and overall efficiency.

Maintenance and Monitoring:

Regularly monitor and maintain the system, checking for any issues, cleaning solar panels, and ensuring that all components are functioning correctly.

It's essential to consult with a solar energy professional or an engineer with experience in solar-powered pump systems to design and install a system that meets the specific requirements of the 3-phase AC pump and the local environmental conditions and don't forget considering the solar drive price .

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