How do you design a solar water pumping system?

When designing a solar pumping system, the designer must match the individual components together. A solar water pumping system consists of three major components: the solar array, pump controller and electric water pump (motor and pump) as shown in Figure 1.

Where will a solar thermal expansion tank be installed?

The expansion tank will be installed on the solar thermal loop (normally near the water tank and pumping station); this prevents pressure changes in the system damaging components. Special insulated pipes will be installed between the pumping station and the solar thermal collector.

How to choose a solar water pumping system?

The type of solar water pumping system: borehole/well (submerged), floating or surface will depend on the water source. If the source is a borehole (proposed or existing) or deep well, then a submersible pump that fits the borehole or well should be selected. If the water source is a river, then a surface pump should usually be selected.

How to design a solar PV system?

The simplest type of PV system one could ever design is by connecting single or multiple PV modules directly to the DC load as shown in figure 1 below. The overall capacity of the modules is such that it can supply power only during the sunshine hours.

How many solar panels should a water pump have?

Setting the solar panel power to 1.5 times the power of the water pump is a theoretical value. It can be adjusted based on local sunlight conditions. If sunlight conditions are good, you can reduce the number of solar panels. Conversely you may need to increase the number of solar panels to ensure an adequate energy supply.

Do solar panels need a float switch?

A minimum of IP56 is required and IP66 or higher is preferred. The solar installer shall install all sensors that are recommended by the manufacturer. Water pumping systems that are pumping water into a storage tank generally include a float switch which is installed in the water tank.