Do you have more information about that? If you average the power over a month, then yes it might be true in the plot, but I suspect it's less smooth in real-time.
It doesn't average out on an intraday basis, but neither does consumption, which has its peaks during the day.
I know someone working at an energy provider heavy on renewables, there they use gas turbines (=biomass) for compensating heavy fluctuations, because those are online in a few minutes.
