This climatic extremity underscores the urgent need for innovative solutions in the renewable energy sector

India is no stranger to scorching summers. Recently, the country has endured its longest and most intense heatwave in recorded history, with temperatures in some areas soaring to a blistering 50 degrees Celsius.

Heatwaves in India typically occur between March and June, with May being the peak month. The Indian Meteorological Department (IMD) defines a heatwave as a period where temperatures exceed 40°C in plains, 37°C in coastal areas, and 30°C in hills, with significant deviations from average temperatures. When this deviation reaches 6.5°C or more, it is classified as a "severe heatwave." The public health implications of such extreme temperatures are severe. Heatstroke, dehydration, and heat exhaustion become common, exacerbating pre-existing conditions like heart disease and respiratory issues. Vulnerable populations, including children, the elderly, and outdoor workers, are particularly at risk. The heatwaves also impact wildlife, causing water scarcity, disrupted food chains, and habitat loss. Livestock suffers from heat stress, affecting milk production and overall health.

Global warming has raised average temperatures, creating conditions ripe for extreme weather events. Heatwaves, in turn, drive up electricity demand, straining power grids to their limits.

A 2022 report from the World Meteorological Organization underscored the vicious cycle: greenhouse gas emissions from fossil fuel-based electricity production contribute to heatwaves, which increase power demand, further straining fossil fuel resources and exacerbating the climate crisis. This highlights the urgent need for large-scale renewable energy adoption.

India has ambitious renewable energy goals, aiming for 500 GW of capacity by 2030. However, the very heatwaves that renewable energy seeks to combat pose challenges, particularly for the solar energy sector. Solar panels, primarily using photovoltaic technology, are designed for optimal efficiency between 15 and 35 degrees Celsius. As temperatures rise, their efficiency drops, with prolonged exposure to high temperatures potentially reducing efficiency by 10-25%. This is because increased thermal agitation disrupts electron flow within the circuits, decreasing voltage output.

To address this challenge, several solutions are being explored. Monocrystalline panels, known for their superior performance under stress, could be a viable alternative for heatwave-prone areas, despite their higher cost. Advances in technologies like TOPCon (Tunnel Oxide Passivated Contact) are also promising, enhancing the efficiency and performance of solar components in harsh environments. Additionally, incorporating advanced cooling systems, such as ventilation within panels, can manage excess heat. Using heat-resistant materials in solar panel construction could also help withstand high temperatures with minimal efficiency loss. The intense heatwaves in India underscore the urgency of climate action. The renewable energy sector must innovate continuously to develop efficient and affordable solar panels capable of withstanding India's diverse weather patterns, from extreme heatwaves to heavy monsoons. Local geographical factors must be considered in design and deployment strategies.

The country's renewable energy sector must rise to the challenge by fostering resilient technologies that can withstand extreme weather events like heatwaves. This journey demands a multi-pronged approach to accelerate the development of heat-resistant solar technologies. Promoting public-private partnerships can facilitate the large-scale deployment of these advancements, making them more accessible and affordable. Only then can India ensure a cleaner, greener legacy for future generations.

 (The writer is the Chairman of Hindustan Power Group; views are personal)