The UC San Diego microgrid has over 33 megawatts of installed onsite generation, including gas-turbine cogeneration and storage, solar, fuel cell, steam, and diesel. The onsite generation is only enough to support critical loads. To cover the rest of their load demand, the university purchases additional electric power from SDG&E. The idea behind UC San Diego’s microgrid was that any time there was a disturbance in the main grid, they could disconnect and maintain power to critical facilities.