Part 2: California Rule 21 and Smart Inverters

Rule 21 is in place to protect the bulk electric system (BES) from load spikes as a result of Microgrids injecting excess power onto the grid. Smart Inverter Functionalities are used in European countries with high penetration distributed generation (DG) to assist with grid stabilization and reliability. California is in the process of modifying Interconnection [...]

November 13th, 2015|

Part One: What is California Interconnection Rule 21?

California Interconnection Rule 21 is a tariff used to describe the interconnection, operating, and metering requirements for generation facilities to be connected to a utility’s distribution system. The California Public Utilities Commission (CPUC) has jurisdiction over each of California’s large investor-owned utilities where Rule 21 is enforced. The Rule 21 tariff applies to facilities that [...]

November 5th, 2015|