When my system makes more kWh of electricity than I use this excess power goes back into the grid. If there is a power outage my system shuts down so that it will not put power back into the grid that could potentially hurt utility workers working on the lines to fix the outage. - this makes complete since to me.
Okay now if I get a few powerwalls added to my system if I understand correctly instead of shutting down in a power outage the system will disconnect from the grid and during the day the panels will keep producing power to run the house and to keep the powerwalls charged and at night the house will run off the powerwalls
okay, so now one question. during the day if the power goes out and the system disconnects from the grid if the panels are producing more power than the house is using and the powerwalls are fully charged where toes the extra power that the panels are generating go? -