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Distributed Energy Resources

DER. A source of electric power that is not directly connected to a bulk power system.

Definition in an IEEE Standard

Source: 1 (p21)

A source of electric power that is not directly connected to a bulk power system. DER includes both generators and energy storage technologies capable of exporting active power to an EPS. An interconnection system or a supplemental DER device that is necessary for compliance with this standard is part of a DER. DER is equivalent to “distributed resources (DR)” as defined and used in IEEE Std 1547-2003.

Last modified: 2025-06-20

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  1. (2018). IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces. https://doi.org/10.1109/IEEESTD.2018.8332112 ↩