SHANGHAI • China's efforts to reduce chronic air pollution could increase its ability to generate solar power by up to 13 per cent by allowing more sunlight to reach the earth, according to a study published yesterday.

China's so-called photovoltaic potential fell by an average of up to 15 per cent between 1960 and 2015 as a result of pollution, climate researchers from Switzerland, the Netherlands and China said in a report published by the Nature Energy journal.

Reverting to 1960s radiation levels could increase power generation by 12 to 13 per cent, researchers said, boosting Beijing's efforts to increase solar contribution to the national grid and bring down costs.

China has been working to curb choking levels of pollution by cutting coal use, improving fuel standards and encouraging cleaner forms of industry and energy.

Hazardous airborne particles known as PM2.5 fell by 42 per cent in 74 major cities from 2013 to 2018. The country's total installed solar capacity stood at 170 giga-watts at the end of 2018, about 9 per cent of total generating capacity, with solar last year producing 177.5 terawatt-hours of electricity, about 2.5 per cent of the total.

China is keen to boost the profitability of solar firms to reduce the subsidies paid to renewable energy providers, with the rapid rise in new capacity creating a payment backlog expected to reach 60 billion yuan (S$11.8 billion) by next year.

China is also launching a series of subsidy-free solar and wind power plants this year.

REUTERS