A Distributed Energy Resource (DER) is any resource on the distribution system that produces electricity. To make it simply, if you have installed a renewable energy generator in your house, your house has automatically become a DER.
Distributed energy resources include the following types of embedded generators:
Turbines-Gas, Wind, Hydro-electric
Solar Photovoltaic(PV) System
Diesel or Petrol Generators
Energy Storage System
Vehicle to Grid System
Co-generation and Other Renewable Energy Generating System