On a bright sunny day the collector will begin to get hot. When this happens the sensor will tell the computer to turn Fan Number 1 ON.

The air will blow through the collector and become hot.
Then it goes through the pipe into the storage box where it heats the rocks.
Round and round it goes, all day making the rocks hotter and hotter. When the sun goes
down the fan stops. The air stops moving, but the rocks are hot now.

At night, or if my house starts to cool off, the THERMOSTAT tells the computer to turn ON Fan Number 2.

The fan draws the cool air from the house into the Storage Box with the hot rocks. The rocks
warm the air as it blows through the storage box and back into the house. That makes
the house nice and warm. When it has warmed up again Fan Number 2 shuts off. That
keeps the house from getting too hot.

And that is how the Wizard's Solar Heat system works!