Why electric vehicle charging is free during Chuseok daytime

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Average SMP in August was 148 KRW
It rose to 167 KRW in early September, but as the weather suddenly turned autumnal, it dropped to the 100 KRW level.
Since it was 6 KRW at 13:00 last Sunday, it will likely hit 0 KRW around noon during the holiday period. (During last year's Chuseok holiday, it was 0 KRW on the 8th and 6 KRW on the 9th)
What this means is that due to an oversupply of electricity, even power plants that are difficult to control via output curtailment must undergo load reduction, and these losses are larger than expected.
That is why they are offering charging fee discounts, even if it's just a "grasping at straws" measure.
Anyway, you are contributing to the national economy through manual V2G while also receiving discount benefits, so charge up diligently. Based on the weather forecast, Sunday will be the most helpful time.
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Conclusion: The more you use free charging, the more you help the national economy, so make the most of the free charging.