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“Even if is unavailable or its price rises, farmers no longer have to worry,” he said, “because this irrigation machine runs on solar power.”

He added that the panels sit idle for eight months after the irrigation season ends, and that connecting surplus electricity to the national grid through net metering could benefit farmers, institutions, and the government alike.

Further into the char lands of Kurigram, farmer Meher Jamal of Char Paschim Bajra at Ulipur upazila said vast areas surrounded by the Teesta River once sat uncultivated because irrigation was out, but it meant increased costs and labour.

“For the last few years, many char lands are now being cultivated regularly because of irrigation facilities through solar power,” he said. “Land that once remained unused is now producing crops.”

Sudhan Chandra Sen, a farmer from Madhupur village at Kaunia upazila of Rangpur, said the difference is simple. “There is no worry about fuel. Electricity comes from solar power, and we get water. Crops are better, and costs are lower.”

He noted that while electricity is less reliable, as it often comes and goes, delaying irrigation, solar power is sustainable and consistent. “Water is always available.”

In Bogura, Abdul Hamid from Kachua village at Shibganj upazila cultivated Boro on five and a half bighas. He said solar-powered pumps have reduced both his costs and stress. “I planted Boro paddy after harvesting potatoes. So far, I haven’t had to worry about irrigation or the cost. I can pay the irrigation fees after harvesting the crop.”

Abu Hasan, another farmer from the same village, said crops under solar pumps yield better because the water supply is uninterrupted. “I face no water shortages. I have to pay Tk 1,500 per bigha for irrigation after the harvest.”

Beyond individual farms and government initiatives, private operators have built businesses around solar irrigation. Abu Jafar Sujan, regional manager of Salek Solar Power Limited, said his company runs 122 solar pumps across Bogura, Gaibandha, Meherpur, and Panchagarh districts.

“Each pump has a lifting capacity of 5 to 20 horsepower. Smaller pumps cover 30 to 40 bighas, while the larger ones irrigate up to 120 bighas of Boro land, he added.

Abu Bakkar Siddique, who looks after a 20-horsepower irrigation pump owned by Salek Solar in Kachua, said 100 bighas of Boro land were irrigated under this pump this year.

Nationally, the state-run renewable project financer Infrastructure Development Company Limited (Idcol) has funded the installation of approximately 1,523 solar pumps through six companies, covering around 15,000 hectares.

“There are 152 such pumps in Bogura, Sirajganj, Gaibandha, and Naogaon. However, some remain inactive due to various complexities and a lack of technical spare parts,” an official of the organisation said on condition of anonymity. “We plan to install 10,000 solar pumps across the country by 2030.”

The ADB, in a December 2023 report on scaling up solar irrigation pumps in Bangladesh, said irrigation costs in Bangladesh account for 43 percent of total agricultural costs.

It estimated that replacing diesel pumps with solar could displace consumption of 10 lakh tonnes of diesel annually, avoiding 30 lakh tonnes of carbon dioxide equivalent each year.

But installation has slowed sharply. After peaking at 12.88 MWp in 2019, new installations had fallen to just 4.65 kWp by 2025, according to the state-owned Sustainable and Renewable Energy Development Authority (Sreda), responsible for increasing renewable energy production.

Rangpur BADC’s Altaf confirmed that no new solar irrigation projects have been launched in Rangpur division since 2022, and some existing pumps remain inactive due to technical problems and missing spare parts.

Mizanur Rahman, chief engineer (operation) of Northern Electricity Supply Company PLC (Nesco) in Rangpur, believes that if diesel-dependent irrigation can be quickly transformed into solar-powered irrigation, it would save foreign currency and reduce carbon emissions.

For climate-vulnerable Bangladesh, this could be an effective path toward sustainable agriculture, he added. “Most solar-powered irrigation machines are located in areas under the Rural Electrification Board. Therefore, implementation would be possible if the relevant authorities take initiatives to introduce net metering at those installations.”

Rights activists noted that solar projects are highly important for increasing agricultural production, ensuring food security, and modernising agriculture.

“Government and private initiatives should further expand solar-powered irrigation projects to improve the fortunes of marginal farmers,” said Shafiqul Islam, president of the Lalmonirhat district unit of Nodi Bachao Teesta Bachao Sangram Parishad.