Pumping water is a universal need around the world and the use of photovoltaic power is increasing for this application. PV powered pumping systems offer simplicity, reliability, and low maintenance for a broad range of applications between hand pumps and large generator driven irrigation pumps. The solar PV powered water-pumping system (DC Surface suction, DC floating, and DC or AC submersibles) can offer a veritable panacea to the problem of finding power to pump water for irrigation in India. Typical pump systems in India are of the DC surface suction type (approximately 86% of solar pumping systems installed in India), DC submersible type (2%), DC floating type (2%), and AC submersible (10%). The system for solar pumping depends on the nature of the well: deep well, bore well, open well etc.
Regardless of the type of pump used, water is usually stored in a tank or reservoir for use at other times. Most pumping systems do not include batteries for on-demand water. However, batteries are sometimes used in systems where pumping time must be controlled because of low water demand or low source capacity.
India has about 15 million grid-powered pump-sets and close to 7 million diesel-powered pumps. However, only about 7500 solar pumping systems have been installed for agricultural use in India.
The problems with the grid-powered pumping systems are:
- Demand for electrical energy far outstrips supply, and the gap continues to widen
- It is proving increasingly difficult for the government to continue subsidizing the rising costs of generation, transmission and distribution losses, pilferage, etc (to deliver 3600 kWh to a farmer to pump water, 7000 kWh is required to be generated, assuming a diversity factor 2). The loss of revenue to the government is colossal.
- The capital cost to the government to provide an electrical connection for a single pump-set of 3 hp capacity (sufficient for 2 hectares) is estimated at Rs 1.37 lakh by Andhra Pradesh Transco (2002 figures)
- The costs and tariffs of electricity continue to rise – the marginal farmer is unable to pay for the electricity)
- Grid power is unreliable and of poor quality, often leading to motor burnouts at the tail end.
- In a coal-fired thermal generating station, 1 kWh of electrical energy generated translates to 11.2 tonnes of carbon dioxide emission a year.
- Village Water Supply
- Stock Watering
- Drinking water
- Agriculture related use
- Animal Husbandry
- Poultry farming
- High value crops
- Farmers /Ranchers
- Solar Power vs Diesel Generator
- Types of Solar Cells
- Major obstacles in the Captive Solar industry
- Hottest sectors in the Market that Use Solar Power
- Large Industrial Facilities that use Captive Solar Power
- Large Commercial Facilities that use Captive Solar Power
- Solar Power in the Communication Sector
- Solar Power Generation to Pump Water
- Solar Powered Warning Signals
- Solar Powered Lighting
- Solar Powered Commercial Refrigerators
- Technology Options involved in Captive Solar
- Stand Alone PV Systems
- Grid connected Captive Solar Plants
- Grid connected Captive Solar Plants – without battery
- Grid connected Captive Solar Plants – with battery
- Hybrid Technology Involved in Solar Plants
- Technology Option Prevalent In India and Future Trends
- Setting up a Captive Solar Plant
- Installing a Captive Solar Power Plant
- Installing a Hybrid System
- Essential Components to Set Up A Captive Plant
- Optional Components to Set Up A Captive Plant
- Default Components to Set Up A Captive Plant
- Key Factors to Consider while setting up a Solar Plant
- Solar PV in India – Industry Status & Trends
- Nodal Agencies that Support Renewable Energy Financing in India
- Banks and Institutions that Support Renewable Energy Financing in India