16
SOLAR PUMPING
Guidelines - Electrical design and installation
of solar pumps
4
PUMP CONTROLLER OR SOLAR PUMPING INVERTER
Except for specific cases, (for example when rehabilitating a borehole and you need to procure a controller for an existing
pump), it is the supplier’s responsibility to propose a suitable controller (or inverter) for the pump he selected for his offer. It is
therefore rare to detail the technical specifications of a controller (or inverter) in a quotation request.
In a price schedule (BoQ), it is acceptable if the line «pump controller» or «solar pump inverter» appears,
meaning that this
equipment
is to be provided, including the following functionalities:
TECHNICAL SPECIFICATIONS OF QUOTATION REQUESTS
•
MANUAL ON/OFF BUTTON manually turn on and off the pump.
•
PROTECT FROM LOW WATER LEVELS automatically stop the pump when there is no water above the pump.
• DISPLAY CURRENT RUNNING POWER OF THE PUMP check if the pump is running at
full speed or is under charged, mainly in
the morning and evening when there is a little sunlight.
The following functionalities are optional:
• Connection of a sensor system to start / stop the pump automatically depending on the level of water in the main tank.
• Alarm report on terminal block
to report problems remotely, or to automatically turn on
a generator in case of problem, or when
the tank is empty due to lack of sunlight.
PUMP CONTROLLER OR SOLAR PUMP INVERTER?
These two devices have the same function: to operate the pump. The different name between controller and inverter comes
essentially from the type of pump they drive:
•
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