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A solar-powered pump is a pump running on electricity generated by photovoltaic panels or the thermal energy available from collected sunlight as opposed to grid electricity or diesel run water pumps. The operation of solar powered pumps is more economical mainly due to the lower operation and maintenance costs and has less environmental impact than pumps powered by an internal combustion engine (ICE).
A photovoltaic solar powered pump system has three parts:
- The pump
- The controller
- Solar panels
The solar panels make up most (up to 80%) of the systems cost. The size of the PV-system is directly dependent on the size of the pump, the amount of water that is required (m³/d) and the solar irradiance available.
Voltage of the solar pump motors can be AC (alternating current) or DC (direct current). Direct current motors are used for small to medium applications up to about 3 kW rating, and are suitable for applications such as garden fountains, landscaping, drinking water for livestock, or small irrigation projects. Since DC systems tend to have overall higher efficiency levels than AC pumps of a similar size, the cost are going to get reduced by using smaller solar panels.
Finally, if an alternating current solar pump is used, an inverter is necessary that changes the direct current from the solar panels into alternating current for the pump. The supported power range of inverters extends from 0.15 to 55 kW and can be used for larger irrigation systems. However, the panel and inverters must be sized accordingly to accommodate the inrush characteristic of an AC motor.
PS Helical Rotor Solar Pump Systems
LORENTZ PS helical rotor pumps are high quality products designed for drinking water supply, livestock watering and smaller irrigation applications. PS helical rotor pump systems deliver water economically, cleanly and reliably, anywhere.
Max. flow rate: 3.9 m3/hour
Max. lift: 350 m
PS Centrifugal Solar Pump Systems
LORENTZ PS centrifugal pumps are high quality products designed for higher flow drinking water supply, livestock watering, and pond management and irrigation applications. PS centrifugal pumps provide large volumes of water economically, without pollution, anywhere.
Max. flow rate: 79 m3/hour
Max. lift: 160
LORENTZ PS Swimming Pool Pumps are high quality products designed for use in residential and commercial swimming pools and SPAs. In most pool applications all of the filtration needs can be met directly from solar panels meaning no electricity costs and significant benefits to the environment.
The LORENTZ pump uses a DC brushless motor for high efficiency and reliability; it is connected to a solar generator via a controller. The controller monitors the system, controls the pump speed and optimizes the amount of water pumped based on the power available.
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