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The Solar Panels provide DC Power to the Controller, which, based on its configuration and sensor inputs, regulates the pump to transfer liquid from Source to Destination.
Generally, there are two main types of solar-powered submersible pumps.
We offer both Helical Rotor and Multi-stage Centrifugal submersible borehole pumps.
Helical Rotor pumps, sometimes known as Progressive Cavity pumps, are suited to low flows due to their positive-displacement design, which can be set to operate at low rpm to match the water supply.
Multi-stage Centrifugal pumps are difficult to manage at low-flow applications, but are suited to high-flow, low-head through to high-head applications.
The main components of a solar-powered pumping system are a high-efficiency drive motor, a pump end, a low water level probe, a submersible cable, a rising main or pump column, a pump controller, a pressure switch or tank full switch, a DC isolator, a solar panel array and a solar panel mounting system.
Choosing a solar pumping system over other power sources is dependent on many factors:
Mains power AC: Cost per kWh, availability to site, cable run distance, 3 Phase availability.
Generator: Cost of appropriately sized Generator, fuel cost, refilling and maintenance costs and schedule.
The size or capacity of the solar pumping system is determined by the available water source, the volume of water to be pumped, and the required head or water pressure.
The solar array must match the required voltage of the controller and the drive motor. The number of solar panels and total wattage is also considered when designing the system.
Submersible borehole pumps are also suitable for pumping from water sources other than a borehole or well. The pump can be installed with a float and a shroud in an open body of water.
Total Dynamic Head is the combination of Vertical lift from the pump to the highest point PLUS the head loss (friction loss) of the Pipeline influenced by the length, internal diameter and output flow rate.
Specialised Software and/or Pipe Engineering books with tables per Pipe Material, ID, and Flow are used to calculate Loss.
Under ideal conditions, pump systems have been known to last more than 20 years. Unfortunately, site conditions and water quality can drastically reduce lifespan.
The Pump will function in cloudy conditions, but at sub-optimal performance as power from the solar panels is reduced.
The Pump may not operate at all if one or more Panels are shaded (sunlight blocked), or even partially shaded, depending on the Panel type.
If the Solar Pump System is required to operate when sunlight is low or not available, a Battery Pack/Mains/Generator may be considered.
The battery size depends on the Power (W) required to run the Pump for a specified time. Larger-capacity batteries are more expensive.
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