California Rule 21
“What governs how Californian solar connects to the grid?”
Solar energy is booming in California. But as more is put on, the variable fluctuations must be controlled. To solve this, California has created a standard known as Rule 21 which governs how grid-tied power producing plants can connect to the grid. The first phase of this includes a Smart Inverter requirement which allows disconnection from the grid in the case of wild solar fluctuations.