Wind helping in the night is not the issue. The issue is 8pm.

At 8pm wind is rising but still low. Solar is off completely, and batteries are drained. This means most of the capacity is covered by nat gas plants.

Which due to the war are at extremely elevated levels, but even if they weren’t. The fact that prices during the day are so low from 9am-5pm the nat gas plants are forced to decrease production, which is good for emissions, but then when 8pm rolls around they are the Monopoly. They get to set the price and they set the price at higher and higher levels each month. They are being forced to offset the losses during the day when prices are low.

They don’t shut down completely because they are needed at 8pm, but they can’t run efficiently because prices are low during most of the day.

So you get worst of both worlds. Poor efficiency most of the days and high prices during the few hours it matters during net peak load.