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Read the articleFor a farm, irrigation is often the biggest energy expense. Diesel and butane are expensive, their prices fluctuate, and the grid does not always reach the borehole. Solar pumping solves all three problems at once.
How it works
Photovoltaic panels power the pump through a solar drive, which adjusts pump speed to the sunlight. Water is pumped during the day and stored in a basin: the basin acts as the battery, which keeps the installation simple and affordable.
Sizing it right
A successful project starts from three figures:
- The flow rate you need, in m³ per day, in the most demanding month.
- The total dynamic head: borehole depth, elevation and pipe losses.
- The irrigation method: drip, sprinkler or basin filling.
Our engineers visit the site, measure the borehole and calculate the panel and pump capacity. An undersized system runs short of water in summer; an oversized one costs too much for nothing.
Payback
Once installed, solar pumping uses no fuel and needs little maintenance. Depending on the diesel or butane it replaces, the investment often pays for itself within a few years, after which water is pumped almost for free for more than 20 years. Also look into the irrigation subsidies of the Agricultural Development Fund (FDA).
An example near Marrakesh
In the Marrakesh region, we built a 250 kWp solar pumping installation for a farm. It covers daytime irrigation and ended the farm's dependence on fuel.
Maintenance
- Clean the panels regularly, especially after sandstorms.
- Check the pump and drive once a year.
- Monitor the flow rate to spot a drop in the water table.