Earth Grid (improved) storage idea for Wind Turbines (not a joke):
Take say five or six wind turbines, and group them around a common area. Connect them all to the same power grid - then connect this common grid to a central, underground battery. The battery would be like a large building buried underground - maybe with ceramic wall containment. Otherwise, it could be a standard lead-acid or Lithium Ion battery. Or, use more durable metals in a novel arrangement to store a large charge. The idea is that it would take several days or weeks to charge up the battery, but it would discharge in the same amount of time, providing a large power ‘buffer’ when the wind dies down. It could provide a consistent amount of current. This would take up more land - say around an acre for the combined turbines and central battery, but then could all be fenced in for security.
The Earth Grids could be aggregated for higher currents and voltages. There would be high up-front costs involved. But steady power outputs might then prove economical in the long run. A possibility worth investigating, it seems to me.