South Korea heat wave tests grid as solar covers a quarter of daytime demand

The Ministry of Climate, Energy and Environment said total grid demand would have reached 106.8 GW once behind-the-meter generation and non-market supply are included. On August 3, non-market solar supplied 17.4 GW and market solar supplied another 7.2 GW during peak daytime demand. South Korea has also selected nine operators for 128 MW / 640 MWh of storage across 32 distribution lines in Honam and Jeju, where saturated substations have delayed renewable connections. The numbers show solar is already material to peak-day reliability, but storage and grid investment are becoming central to further PV growth.