What question did this study set out to answer?

This study aims to understand how localized fires affect rooftop photovoltaic systems and the potential for fire spread in high-rise buildings.

July 26, 2026FireOpen Access

Experimental Study on the Fire Hazard of Flat-Laid Rooftop Photovoltaic Systems Under Localized External Fire Exposure: Implications for High-Rise Building Applications

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Experimental study investigates fire risks in rooftop photovoltaic systems, indicating crucial safety measures for high-rise buildings.

This study aims to understand how localized fires affect rooftop photovoltaic systems and the potential for fire spread in high-rise buildings.
Conducted a full-scale fire experiment on a flat-laid rooftop photovoltaic system using a 100 kW n-heptane pan fire as an ignition source.
Measured temperatures in the under-panel space and upper surface of the PV modules during fire exposure.
Analyzed the role of the waterproofing membrane in fire escalation.
The average cavity peak temperature reached 684.0 °C, significantly higher than the maximum upper-surface temperature of 370.7 °C.
Hazardous temperatures beneath the modules were reached earlier than at surface points, with differences of up to 247 seconds.
The average cavity temperature exceeded 500 °C after 234 seconds, maintaining this level for approximately 201 seconds.

Zhao et al. (2026) studied this question.

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