Here’s how big a deal China’s power crunch is for the economy

BEIJING — Local Chinese authorities have abruptly ordered power cuts at many factories in the last week, reflecting a system trying to react to a number of directives from Beijing, and macroeconomic developments.

While a few economists have cut their forecasts on China’s GDP growth as a result, others are still waiting to see the scale of the impact.

Here’s a broad overview on how the power crunch developed:

Back in late 2020, China stopped buying coal from Australia, once the Asian giant’s largest source of imported coal. Political tensions between the two countries have escalated after Australia supported an investigation into how Beijing handled the coronavirus pandemic.

Meanwhile, historically cold weather that winter drove up demand for coal. Some cities reportedly restricted electricity use in homes and factories.

Alongside a global surge in commodity prices, thermal coal, the primary fuel for electricity production, saw prices soar by more than 40% over 12 months to around 777 yuan per metric ton ($119.53) in December 2020 on the Zhengzhou Commodity Exchange, according to data from Wind Information.

But as China tried to shift to renewable energy, a severe drought hit the hydropower center of Yunnan province. Water-generated power declined year-on-year in July and August by more than 4% each month, according to the National Development and Reform Commission.

Wind-generated power has also slowed its growth, rising 7% in August from a year ago, down from 25.4% growth in July, the commission said.

Analysts have also said China’s climate goals in the latest five-year plan are more moderate than expected. Climate Action Tracker, an international non-profit that reviews countries’ efforts to meet Paris Agreement goals, rated China’s policies and actions as “insufficient” in a report released Sept. 15.

The bulk of electricity in China is still generated by coal. Year-on-year growth in electricity use has surged to its highest in a decade, according to data accessed through Wind.

In addition to extreme temperatures, factories are demanding more electricity as they rush to fill global orders for Chinese goods. Exports have surged by double digits amid the pandemic.

“Demand for power has risen with China’s economic recovery,” Eurasia Group analysts wrote in May. They noted that “several industrial hubs along China’s eastern coast, including Guangdong, Zhejiang, Jiangsu, and Shandong, have warned about potential temporary power supply shortages during the summer peak season.”

In June, state-backed Securities Times reported of some power restrictions in parts of the export hub of Guangdong.

Meanwhile, coal supply was falling as mines shut down in a national effort to reduce carbon emissions. The coal inventory…