Solar Water Pumps

Configuration:

A solar PV water pumping system – commonly known as a solar pump – draws power from solar cell / modules to operate a motor pump set. Solar power pumps use specially developed and energy efficient motor pump sets to achieve higher discharge which off sets the high initial cost. A solar PV water pumping system consists of a number of solar PV modules connected in series – parallel combination to generate sufficient power to operate a motor pump. The solar PV modules are mounted on a metal frame in a manner that the mounting frame can be turned / tilted to ensure that the modules keep facing the sun throughout the day. The system does not have any storage battery since power generated is used directly then and there. The SPV array converts the solar energy into electricity which is used for running the motor pump set. The pumping system can draw water from the open well / bore well or stream / pond or canal.

Types of Solar Power pumps:

SPV water pumping system may be of any one of the following types of motor pump sets

1.Surface mounted motor pumpsets

2.Submersible motor pump set

3.Floating motor pump set

4.Any other type of motor pump sets after approval from test centers of MNRE .

For details of normal discharge rates of water for different types of pumps please refer MNRE website http://mnre.gov.in/file-manager/UserFiles/technical-specification_spwps_2013_14.pdf

Advantages: 

SPV water pumping systems can be installed at a site completely eliminating loss of energy in transmission.

SPV modules need only minimum maintenance and no battery is required

Potential for Use:

SPV pumps are more suitable for remote areas with no or unreliable grid or as an alternative to diesel pumps.  Some of the most popular applications are :

Cost  & Subsidy :

Tentative cost of solar water pumps ranges from Rs.2.10 lakhs to Rs.5.10 lakhs depending on type and capacity of pumps.

MNRE subsidy is available at the rate of Rs.57 per Watt peak subject to a maximum of Rs.2,85000 for a 5kwp/- per system for community applications such as drinking water are to be given priority over individuals. IREDA will provide loans to eligible users  at the rate of 5% per annum  for the remaining price subject to a maximum of 90 % repayable in 10 years (subject to changes).

No. of systems installed so far with subsidy : 285 pumps

Limitations:

Scope for use during day time only

Install solar on house – save upto Rs.14,700 per year

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