Solar Pump Inverters
Solar pump inverters that run standard AC submersible and surface pumps directly from solar panels: 3 HP model and a selection guide.
Products (1)
Brands: Smart
What is a solar pump inverter?
Solar pump inverters are devices that convert the direct current from solar panels into variable-frequency alternating current to drive standard AC submersible or surface pumps. Without using a battery, they pump water into a storage tank or directly into an irrigation line by running the pump during the day while sunlight is available. This enables existing pumps to be operated on solar energy, eliminating fuel or grid costs.
How does it work?
The inverter tracks the instantaneous power the panels can produce and adjusts the pump speed accordingly. When sunlight is strong, the pump runs at full speed; as light decreases, the speed drops and the pump delivers less water. The soft start of the pump reduces mechanical stress on the motor and pipework. Protections such as dry-run and overcurrent may be built into the device depending on the model.
Selection criteria
- Pump power: The inverter's power class (e.g., 3 HP) must match the pump's power.
- Pump type: Compatibility with single-phase or three-phase pump must be verified.
- Panel array: The total voltage of the panels must be within the inverter's input range, and the total power must be sufficient to meet the pump's requirements.
- Protection features: Dry-run, overvoltage, and overcurrent protections.
The number of panels and connection method must be calculated according to the inverter's technical specifications.
Installation recommendations
The inverter should be mounted in a ventilated location protected from sun and rain. Appropriately sized cables and protective components must be used on both the DC panel line and the AC pump line. In borehole applications, connecting a level sensor prevents the pump from running dry. It is recommended that installation be carried out by a qualified electrician.
Frequently asked questions
Can I use it with my existing submersible pump?
It can be used if the pump's power and phase type are compatible with the inverter.
Is a battery required?
No; the inverter runs the pump directly from the panels. A water storage tank is recommended for nighttime use.
How many panels are needed?
It is calculated based on the pump's power and the inverter's input voltage.
What happens on a cloudy day?
As panel output drops, the pump runs more slowly or stops.
Can it be used together with the grid?
Some models may have a grid or generator input; check the product specifications.
Is there a package system available?
You can browse solar agricultural irrigation systems where the pump, panels, and inverter are offered together.