The starting point
A farmer runs a 7.5 HP diesel pump about four hours a day through the irrigation season. At roughly 1.8 litres an hour and about ₹92 a litre, fuel alone costs around ₹13,000 a month in season, before servicing and trips to buy diesel.
How we size it
We start from the water: the depth of the bore or source, the head, and how many litres the crop needs per day. For this farm a 7.5 HP pump with about 7.5 kW of panels and a variable-speed controller delivers the required flow through the sunny hours, with no battery needed. Water is stored in the field or in a tank, not in a battery.
| Estimate | |
|---|---|
| Fuel cost before | about ₹13,000 a month in season |
| Fuel cost after | ₹0 |
| Subsidy | PM-KUSUM component B, through the state agency; the share varies by state and year |
What changes for the farmer
No fuel, fewer breakdowns and irrigation that starts when the sun does. The trade-off is that pumping follows the sun, so the field plan has to suit daytime watering.
What we would do
Check the source and head on site, confirm eligibility and current subsidy terms under PM-KUSUM in Jharkhand, and size the pump and array so the controller is not running at its limit all season.
Illustrative example. Fuel use and subsidy terms vary; we confirm both before quoting.
