When a solar energy company offered Harpal Dagar a fixed pay for 25 years in exchange for installing solar panels on their cultivation fields, he thought it could be a scam. Today he says that his income has tripled and sleeps quieter.
“Too good to be true.” That was what this Indian farmer thought when the company Sun Master proposed to install elevated solar panels on its land on the outskirts of Delhi. I could continue working the land and, in return, would receive an annual payment for 25 years.
According to a report of BBC NewsDagar had lost entire crops because of the Monzones, so he accepted the installation of the panels to have fixed income. “Today I think it was the best decision I have made,” he told the British environment.
Harvest food and energy at the same time. The systems that combine agriculture with solar energy generation in the same land have a name: agrovoltaic. And in the most populous country in the world they are emerging as the most promising solution to produce clean energy without sacrificing the land necessary to feed the population.
The agrovoltaic part of a simple idea: take advantage of the vertical space. Instead of choosing between a crop field or a solar park, They both haveonly that photovoltaic panels are mounted on high structures, at a height of at least three and a half meters so that tractors and other agricultural machinery can pass below.
India cannot do without cultivation soil. In India more than 55% of the population It depends on agriculture. As the country approaches the 1.7 billion people in 2050, it will have to produce about 350 million tons of grain
At the same time, India has pledged to meet ambitious climatic objectives that will require dedicating solar and wind energy between 55,000 and 77,000 square kilometers of land. According to a report from Mongabay Indiaagrovoltaic would resolve this paradox of “food security vs. access to energy”.
Not everything that shines is gold. Sun Master pays Harpal Dagar about $ 500 per hectare per year, plus a monthly salary of 170 dollars for the maintenance of the panels. Dagar cultiva turmeric, which benefits from the microclimate created by the solar panels. Its shadow protects the cultivation of extreme heat and decreases water evaporation, reducing irrigation needs.
It is not always beneficial. Depending on their disposition, solar panels reduce between 15 and 30% the light that reaches plants. This makes basic cultures that need a lot of sun, such as wheat, rice or soybeans, are not viable. Anand Jain, another farmer who has experienced with the system, says he succeeded with strawberries and tomatoes, but “the cauliflower did not work so well.” The green leafy vegetablesginger and some flowers have also benefited.
The slow takeoff from agrovoltaic. The adoption of agrovoltaic in India is being slow, especially compared to China, which has 12 times more projects in operation. Incompatibility with some crops is one of the problems, but there is an even greater financial problem: raising panels more than three meters from the ground has a price.
The installation of an agrovoltaic system is between 20 and 30% more expensive than that of a conventional solar park. Small farmers cannot afford these systems, so they depend on companies with capital that want to rent their land with a 25 -year contract.
Technology will solve some challenges. For companies to be willing to assume that risk, more efficient and profitable systems are already being developed. “Farm-Forward” solar panels with More space between panel ranks to maximize the entry of light and further facilitate the step of machinery. And new software to simulate how much light and heat receives each sheet, how it affects photosynthesis and, ultimately, what performance of the harvest.
The potential is simply gigantic. A GIZ technical report He estimates that agrovoltaic in India can point to a capacity of between 3,156 and 13,803 gigawatts. To put it in perspective, the total installed capacity of photovoltaic energy worldwide is 2 GW.
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