Are you able to charge the Powerwalls with grid power, or only with Solar generated power? Also, does the Wind turbine plug into the same Inverter as the solar panels?
Due to regulations, at this point in time the Powerwall charges with solar generated power. I am hoping that changes soon. The wind turbine uses its own stand-alone inverter, while the solar panels each have their own built in inverters.
With the most recent Tesla firmware update I can now use the Powerwall for energy arbitrage! Today is the first day of experimenting with this feature, but I do hope to have some interesting statistics to share soon.