Network Independent Alternative Energy Systems
They are able to operate AC motors by transferring the energy from the sun directly to the water pump. It is preferred especially in areas where there is a need for continuous water and where there is a pool.

BENEFITS

In these systems, the battery is not used, so it has a longer life.
First investment costs are lower.
The inverters are more resistant to the pump inrush currents through frequency control.
DISADVANTAGES

It works only when there is sun.
Depending on the depth of the well, solar energy must exceed a certain threshold level.
It can only be used for irrigation purposes.
It can draw water at variable flow rate.