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Solar Water Pumping


Livestock water supply is one of the most common solar water pumping applications. Typically water is pumped from a bored well into a holding tank. Most systems are simple in design with water being pumped to a tank located near the well.  Larger systems may have holding tanks located far away from the well site. Other systems may have multiple stock tanks that may be gravity fed from a main holding tank located at a higher elevation.

Village water supply may be modest in need or quite large. Depending on local geography, systems may require pumping into larger storage tanks above a village. Water is then gravity fed to the village. Other systems may require water to be pumped into storage tanks with pressure being provided by additional pump or pumps. Village water systems may require the use of a back-up generator to pump water during periods of poor solar isolation.

Irrigation systems are designed for two types of applications. One being field irrigation, where water is flooded into large areas. The other being pressurized drip irrigation, where water is fed into piping to be dripped or sprayed directly onto plants. Depending on the water need, the systems may be very small in size or be very large in size. Water may be pumped from a bored well or from a river, stream or pond. These systems generally employ larger centrifugal and or shaft driven down hole pumps.

These systems supply household water needs that may or may not include some livestock needs or garden needs. These systems may be installed as a separate PV system or might be incorporated as a load in an off grid home system.  Most require more than one pump but may employ a single submersible pump that supplies water to a pressure system located at the house or pump building.

These systems may be remote in nature and requiring a PV system for power. They might also be part of a household system or water catchment system. Water is purified by means of filtration, reverse osmosis, ultraviolet treatment and ozone injection. Systems may employ one or all of the above techniques.

These systems are employed in aquaculture operations and in wetland areas where increased oxygenation improves the water quality.  Oxygenation is provided by pumping compressed air into the water or by lifting the water above the surface and having it fall back to the surface like in a decorative fountain.