It is not clear to me how they use the solar and wind power. Are they heating the steam from a geothermal source, higher than the source's temperature, and sen

It is not clear to me how they use the solar and wind power. Are they heating the steam from a geothermal source, higher than the source's temperature, and sending it back down the geothermal well when power is cheap? And then later run the steam through a turbine when power is expensive? Or are they using cheap power to pump water into the well at high pressure, to force it it deeper into the fractured rock? And then later use the extra steam to produce power? Or something else?