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arXiv · 2507.13534

The impact of heatwave-driven air conditioning adoption on electricity demand: A spatio-temporal case study for Germany

Leo Semmelmann·Frederik vom Scheidt
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Abstract

Intensifying heatwaves driven by climate change are accelerating the adoption of mobile air conditioning (AC) systems. A rapid mass adoption of such AC systems could create additional stress on electricity grids and the power system. This study presents a novel method to estimate the electricity demand from AC systems both at the system level and at high temporal and spatial granularity. We apply the method to a near-future heatwave scenario in Germany in which household AC adoption increases from the current 19% to 35% during a heatwave similar to the one of July 2025. We analyze the effects for 196,428 grid cells of one square kilometer across Germany, by combining weather data, census data, socio-demographic assumptions, mobility patterns, and temperature-dependent AC activation functions. We find that electricity demand of newly purchased mobile AC systems could increase the peak load by over 12.9 GW, with urban hot-spots reaching 5.2 MW per square kilometer. The temporal pattern creates a pronounced afternoon peak that coincides with lower photovoltaic generation, potentially exacerbating power system stability challenges. Our findings underscore the urgency for proactive energy system planning to manage emerging demand peaks.

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Leo Semmelmann, Frederik vom Scheidt. 2025-07-17. The impact of heatwave-driven air conditioning adoption on electricity demand: A spatio-temporal case study for Germany. https://arxiv.org/abs/2507.13534

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