Solar energy efficiency faces challenges from rising global temperatures

Rising global temperatures are impacting the efficiency and safety of solar energy infrastructure. While increased summer sunlight can compensate for thermal losses in total energy production, extreme heat significantly reduces the technical efficiency of photovoltaic cells by lowering voltage.

In the United Kingdom, a solar owner reported a 60% drop in power output during a heatwave, with infrared imaging showing panel surface temperatures reaching 81°C. While standard efficiency losses are expected—often cited around 0.35% per degree Celsius—such drastic declines may indicate underlying technical issues.

To address thermal risks like hot spots, which can cause material degradation or fire hazards, new technologies are emerging. AIKO’s ABC (All Back Contact) modules have received the ‘PV Module Anti-Ignition Hazard’ certification from TÜV Rheinland. In comparative testing, these modules maintained temperatures significantly lower than TOPCon technology, reaching a maximum of 80°C under shading conditions compared to 139°C for TOPCon modules.