With the recent power outages due to Hurricane Sandy, how will the Super Charging stations operate in the event of the power grid being down? Reason I ask is that for the Supercharging Stations to feed the power grid with the excess solar energy, they will have to be a Grid-Tie system.
All Grid-tie Solar systems shut down when the grid is down. This is per code: National Electric code requires that when grid is down, solar cannot operate. Your inverter piggybacks off the sine wave from the grid. When there is no sign wave present, inverter will not operate. The only way to reap the solar electric when the grid is down is to store the electric in batteries, have those batteries tied to a separate dedicated panel for emergency loads and then it could operate independently of the grid.
Given that the Super Charging stations may have battery backup, what happens after a few days with the grid being down? No more juice.
To me, the National Code cripples a Solar panel system. Why can't there just be an automatic transfer switch that still feeds solar power to the local house or charging station and not backfeed the grid in the event of the grid being down. I am curious as to the purpose of this National Code and wondering if Tesla and/or Solar City is looking into a solution for this.
I have a home Solar system and it makes me crazy to see my system down during power outages.