What is a “grid-tie” PV system?
A. Today in California you may connect your solar system directly into the wires of your utility. Since the “Net Metering Law” allows you to do this you will actually be spinning your meter backwards when your system is generating more power than you are consuming. When you generate excess electricity (more power than you are using) it will enter the grid and be used by your neighbors. Your meter will tally the excess and give credit your account. After a year the excess credits are eliminated and you balance is adjusted back to zero again. In effect, if there are any unused energy credits at the end of the year, the utility received this solar power for free.
