China hits record power demand

China’s grid operators are dealing with a simple summer problem: extreme heat is pushing air-conditioning demand higher at the same time solar panels become less efficient in very high temperatures. State Grid Corporation of China said on August 5 that loads in the country’s northern, northeastern and eastern regions hit records earlier this week as the heatwave spread. Reuters reported no blackouts in those peak hours, and Chinese state-linked reports said the national load has set repeated highs since early July. That combination matters because the stress shows up in the hours when households and businesses need power most. The National Energy Administration, cited by Global Times, said the state grid load reached 1.553 billion kilowatts after setting three new records since early July, driven by heat waves and economic activity. Earlier official expectations had put China’s summer peak load near 1.6 billion kilowatts this year. (wtaq.com) ### Why did demand jump so fast this week? State Grid said soaring temperatures boosted air-conditioner use across several major regions, sending grid loads to all-time highs on Monday and Tuesday. Reuters, citing the company, said the records were set in northern, northeastern and eastern China. China had already been warning about a tight summer. China News Service reported on July 15 that nationwide electricity load climbed to a then-record 1.551 billion kilowatts, surpassing a previous high set four days earlier as temperatures rose. (globaltimes.cn) That pattern suggests the latest records are part of a broader run of repeated summer peaks rather than a one-day anomaly. ### If solar capacity is still growing, why does heat hurt output? (wtaq.com) Chosun reported on August 5 that South Korea’s solar generation peaked at 26.89 gigawatts in August, down from 32.26 gigawatts in April, as heatwaves reduced panel efficiency. The report said a meteorological study is under way to assess the temperature effect. High temperatures do not stop solar generation, but they can reduce panel performance even in sunny conditions. (ecns.cn) Chosun quoted industry participants saying the common assumption that solar output rises with heat is wrong once panel temperatures climb too far. That means a heatwave can lift electricity demand while also trimming part of the renewable supply available to meet it. (chosun.com) ### How did China avoid blackouts during the peak? Reuters reported that no blackouts were reported during the peak air-conditioning hours this week. Chinese reports said grid operators used cross-regional transfers and boosted supply to maintain stability as demand climbed. China’s official messaging before the peak season was that supply and demand would remain broadly balanced nationwide, with some regions facing tight conditions during summer peaks. (chosun.com) That framing helps explain why operators were preparing for local stress even before this week’s records. ### What does this show about the power mix during heatwaves? The immediate lesson from August’s heat is that dispatchable generation still carries much of the burden when demand spikes quickly. (wtaq.com) In practice, that means coal, gas, hydro and grid transfers are the tools operators can call on when solar output is weaker than expected or demand rises after sunset. The sources do not show a reported outage event this week, but they do show a system leaning on controllable supply to ride through the peak. (ecns.cn) ### What should readers watch next? The next data points are likely to come from China’s grid operators and the National Energy Administration as August temperatures continue. Chosun said South Korea’s meteorological review of solar underperformance is under way, and Chinese authorities had already warned that some regions could face tight supply during the summer peak season. (chosun.com) (wtaq.com)