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Introduction

These pumps are designed to provide water supplies in isolated locations, with no long cables to bury or electricity bills to pay.

For most drilled wells the water level will be below the suction limit of any pump, so the pump needs to be sited actually in the well itself. The best way to do this is with a submersible pump lowered into the water and positioned between the yearly maximum and minimum levels.

Using a conventional 230Vac submersible pump run from a large inverter is often the simplest choice. However, such centrifugal pumps tend to be energy inefficient and high power consumers. Low voltage submersible diaphragm pumps are available which are both low powered and efficient.

For a remote home water pumping can be a significant power requirement so it often desirable to set up a separate wind or solar pumping system purely for this.

The PV panels or wind turbine can then be sited at the water source reducing wiring problems, operating the pump directly during daylight hours or when windy with a water tank used for storage. (Storing water is more efficient and economical than storing energy in batteries). System costs can thus be minimised and extra demands on the main system and battery bank avoided.

Linear Current Booster (LCB) controllers are useful on solar direct systems for matching the power produced by the array to that required by the pump, so enabling the pump to run in lower light conditions.

Use of trackers to mount the panels will increase output by allowing the pump to start operation earlier in the day and continue later.

Wind-electric pumping systems have advantages over traditional mechanical driven wind pumps in that they need not be directly sited at the water source, but can be at the optimum wind site. 24hr operating potential gives high average daily flow rates.

Controllers are used to maximise flow rates over all wind conditions.

These pumping systems fall into to main Into two main categories and Wind/Hybrid

Surface Pumps...

Submersible Pumps...

Wind and Wind Hybrid Pumps...