1. Solar Pumping System Introduction
1,Solar Cell Array
The solar array, an aggregation of many solar modules connected in
series and in parallel, absorbs sunlight radiation and converts it
into electrical energy, providing dynamical power for the whole
2,Solar Pumping Inverter
The pumping inverter controls and adjusts the system operation and
converts the DC produced by the solar cell array into AC to drive
the pump, and adjusts the output frequency in real-time according
to the variation of sunlight intensity to realize the maximum power
point tracking (MPPT). Advantages are as follows:
1). Patented dynamic VI MPPT algorithm ensuring swift response and
2). Digital control, automatic operation, data collection and
storage for up to 8 years, etc; 98% conversion efficiency, complete
3). The system is free of any energy storage devices. Instead, the
system stores water. As a result, reliability is improved
dramatically comparing to systems requiring energy storage
(battery) and at the same time greatly reducing construction and
Any three-phase pump is suitable for solar AC pumping system, pump
powered by solar cell arrays draws water from the deep wells or
rivers and lakes and pours into the storage tank or reservoir, or
directly connects the irrigation system, fountain system, etc.
According to the actual system demand and installation condition,
different types of pumps such as centrifugal pump, axial flow pump,
mixed flow pump or deep well pump can be used.
For Daily Life Water Supply For Agricultural irrigation
For Desert Control For Forestry irrigation
4.Project Case Analysis
Daily Water Supply and Agricultural Irrigation Solar Pumping
Project Location: Countryside of Kampala Uganda
Project Background: Uganda has abundant solar source where the sunshine time reaches
2957 hours per year and more than 8 hours per day averagely.
Comparing to Solar energy, electrical energy has a big problem, the
grid could cover few places, and the price of electrical gets
higher. The price of diesel and oil reached the highest ever. In
this situation, solar system will be government’s first choice.
Solution: Solar water pump was adopted for the project solving the daily
water supplying and agricultural irrigation.
Economic Benefit: New solar pumping technology is adopted to reduce the carbon
emission and save energy, no diesel,no maintenance, no bill on
power supply, and no burden on farmers, and livings as well as
farming are improved.The government saves capital on the power grid
construction. The system generates power of 27375 kWh every year.
During 25 years lifetime of our system it will save coal 257.3
tons; and reduce carbon emission 113.2 tons,sulfur dioxide 5.1
tons, dust 3.9 tons and lime ash 66.9 tons.
Social Benefit: A “renewable energy committee” was built by the local government
for promoting the solar power pump.