The Quiet Swap: Bangladesh Is Putting Its Irrigation on Solar Power

By the UISC BD Editorial Desk · Union Information Service Center, Bangladesh · Published 9 September 2026 · 6-minute read

Bangladesh's agricultural productivity — third in the world for vegetables and rice — depends on irrigation that extends the growing season beyond the monsoon. For decades, most of that irrigation has run on diesel.

Diesel is imported, paid for in foreign currency, subject to global price swings, and burned in hundreds of thousands of small pumps across the country. Replacing it is one of the more sensible energy interventions available.

What Has Been Installed

As of May 2024, IDCOL had installed 2,226 solar irrigation pumps across the country. Alongside them: 661 from BMDA, 29 from BADC and 10 from other organisations — around 49 MW of capacity in total.

IDCOL's target is 10,000 solar irrigation pumps by 2027, within a broader government goal of 150 MW of generation from the irrigation sector.

What One Pump Does

Under the IDCOL programme, pumps range from 3 to 18.5 kW, operating at dynamic heads of 10 to 18 metres. An average unit at 18.5 kW irrigates around 18 hectares and can lift 2,500 to 3,000 cubic metres of water per day.

The economics for a farmer are straightforward. A diesel pump has a low purchase price and a permanent fuel bill. A solar pump has a high purchase price and effectively no running cost. Over the life of the equipment, solar wins — the obstacle is financing the upfront gap, which is exactly the problem IDCOL exists to solve.

The Institution Doing It

IDCOL is the same government-owned financial institution behind the world's largest off-grid solar home systems programme, which put 4.1 million systems on rural rooftops and reached roughly 20 million people.

That is not a coincidence — it is the same model applied to a different problem. IDCOL acts as a wholesale financier, working through partner organisations that handle installation and servicing, with the end user paying in instalments rather than upfront.

Having proven the mechanism once at enormous scale, applying it to irrigation is a lower-risk proposition than starting from scratch.

Why the Rollout Is Slower Than the Target

2,226 installed against a 10,000 target by 2027 implies a substantial acceleration is required, and reporting on the programme has described the rollout as difficult.

The reasons are practical. A solar irrigation pump costs far more upfront than a solar home system, so the financing burden per unit is heavier. Pumps also need to be sited where there is both suitable groundwater and enough farmland within reach to justify the capacity — a matching problem that does not arise when installing a panel on a house.

There is also a genuine sustainability question that researchers have raised: because solar pumping has no marginal fuel cost, it removes the price signal that previously discouraged over-extraction of groundwater. Free pumping can encourage using more water than an aquifer can replace. Work by IWMI and others on solar irrigation and groundwater sustainability in Bangladesh addresses exactly this trade-off.

That is a real design consideration rather than an argument against the technology — and it is better identified now than after 10,000 pumps are in the ground.

Why It Adds Up Nationally

Three benefits accrue at once. Diesel imports fall, reducing foreign exchange outflow. Farmers' operating costs fall, raising net income from the same harvest. And emissions from a large, dispersed source decline — the kind of distributed abatement that is normally difficult to achieve.

The Asian Development Bank has published a roadmap for scaling solar irrigation pumps in Bangladesh through 2031, which indicates the level of institutional attention behind it.

For a country pursuing 10,000 MW of renewable capacity, irrigation is an unusually good place to put solar: demand peaks during daylight, exactly when the panels produce.

Sources

• "Solar Irrigation Program," Infrastructure Development Company Limited (IDCOL) — idcol.org
• "Road Map to Scale Up Solar Irrigation Pumps in Bangladesh (2023–2031)," Asian Development Bank — adb.org
• "What the evidence says about solar irrigation and groundwater sustainability in Bangladesh," IWMI SoLAR — solar.iwmi.org
• "Solar irrigation pumps: Transforming to smart irrigation and improving agriculture in Bangladesh," pv magazine — pv-magazine.com