50°C summers could challenge 5-star ACs soon. Is cooling tech the next investment theme?

As India grapples with increasingly severe heatwaves, experts say the widening gap between air-conditioner ratings and real-world performance could reshape consumer spending, tighten efficiency regulations and create a long-term investment opportunity in energy-efficient cooling technologies.

Current Bureau of Energy Efficiency (BEE) star ratings and Indian Seasonal Energy Efficiency Ratio (ISEER) standards are largely based on testing conditions up to 43°C. However, cities such as Delhi and parts of Rajasthan are increasingly experiencing temperatures of 46°C to 50°C, exposing the limitations of existing benchmarks.

According to Karthik Raju, Executive Director at Atria Renewable Private Limited, India's cooling challenge represents both an affordability issue and a growing risk to the power system.

"India's cooling crisis is simultaneously a household affordability problem and a systemic energy risk," Raju said.

As ambient temperatures rise, the Coefficient of Performance (COP) of air-conditioners declines, causing electricity consumption to increase. Based on COP calculations, a 5-star AC's monthly electricity bill could rise from around ₹2,550 at 35°C to more than ₹4,000 at 50°C.

"For middle-income households already allocating a growing share of discretionary income to cooling, this is not trivial," he said.

Grid risks intensifying

A recent working paper by the India Energy and Climate Center at the University of California, Berkeley, suggests the challenge extends far beyond household electricity bills.

The study found that room air conditioners already account for 60-70 gigawatts (GW), or nearly a quarter of India's peak electricity demand. Without stricter efficiency standards, AC-driven peak demand could rise to 120 GW by 2030 and 180 GW by 2035, exceeding one-third of the country's projected evening peak load.

India is adding 10-15 million new air-conditioners annually and could install another 130-150 million units over the next decade, driven by rising incomes and intensifying heatwaves.

The researchers warned that India could begin experiencing peak power shortages as early as 2028. Under a scenario of 6.5% annual electricity demand growth, evening peak deficits could reach 8 GW by 2030.

Efficiency emerging as an investment theme

Against this backdrop, experts see a structural opportunity for companies developing advanced cooling technologies.

"For investors, the structural opportunity lies in companies advancing high-ISEER inverter technology and thermal-resilient designs rated above 50°C," Raju said, noting that inverter models already account for more than 75% of new AC sales.

"Energy spending pressure will accelerate premiumisation toward genuinely efficient products," he added.

The Berkeley study estimates that sustained efficiency improvements could reduce AC-driven peak demand by 47 GW by 2035 and help avoid nearly ₹8 lakh crore of generation and grid investments.

Abhishek Srivastava, General Partner at Kae Capital, believes the scale of the problem itself creates opportunities.

"That's not a niche problem. That's hundreds of millions of households. When the scale of a problem is that large, the solutions tend to create significant value," he said.

He pointed to smart load-management technologies that can shift electricity consumption away from expensive peak-demand periods.

"That's where the real value creation is," Srivastava said.

With India adding millions of air-conditioners every year and extreme heat becoming more frequent, energy-efficient cooling, smart energy management and thermal-resilient technologies could emerge as one of the country's most important long-term investment themes.