[Someone]

“You need to store the difference between your daily production peak and your daily demand peak”

Firstly, I would think the difference between production and demand on a single day is a better indicator than the difference between your daily production peak and your daily demand peak, which could be months away from the day production peaks.

Even that isn’t correct, though. Such a reserve buffer would be depleted after that worst-case day, so if the day after that day also has demand outstrip production, you’re in trouble.

[imtringued]

You know, we have these things called gas plants... They burn gas and you can turn them off if you don't need them... You can even generate the gas with excess renewables if you really want to...