In Simple Terms
This article explains how solar panels can do more than just generate electricity—they can also help cool crops and workers on farms. By placing solar panels above crops, we can use the shade to keep plants from getting too hot and reduce water loss. This method is called ‘agrivoltaics’ and it helps make farming more efficient.
What is Agrivoltaics?
Agrivoltaics is a system that combines solar panels with agriculture by installing panels above crops. This allows the land to be used for both energy production and food cultivation simultaneously. Research has shown that this arrangement can improve the efficient use of natural resources.
The solar panels provide shade for the crops, reducing high temperatures and heat stress on the plants. This shade helps decrease water evaporation from the soil, enhancing moisture retention and reducing the need for frequent irrigation.
Findings from Recent Research
Recent studies have shown that crops growing under solar panels benefit from lower daytime temperatures. For example, tomato leaves were on average 1.84 degrees Celsius cooler during the day. At peak heat, the leaves were 7.56 degrees Celsius cooler, reducing water loss by 22.4%.
Although the amount of light reaching the crops is reduced by 47%, the carbon absorption rate only drops by 31%. This suggests that the milder conditions help reduce heat stress and offset the negative effects of increased shade.
Additional Benefits of Solar Panels
Aside from benefiting crops, solar panels also gain indirectly. Panels mounted above crops were 5.6 degrees Celsius cooler during the day compared to those on bare soil. This temperature reduction helps recover about 15% of the efficiency lost in high temperatures.
The benefits extend further, as the perceived temperatures for farm workers decrease by 4.46 degrees Celsius during working hours, creating a safer and healthier work environment.
Conclusion
The agrivoltaics system offers an innovative solution for effective land use, helping meet the growing demands for energy and agriculture. By shading crops and reducing evaporation, this system can boost agricultural productivity while providing a better working environment for farm workers. It also helps solar panels operate more efficiently in cooler temperatures, making this system a sustainable and promising choice for the future.