Review of Interconnection Practices and Costs in the Western States

Lori Bird, Francisco Flores-Espino, Kristen Ardani, David Manning, Richard McAllister, Christina Volpi, Christina Volpi

Research output: NRELTechnical Report


The objective of this report is to evaluate the nature of barriers to interconnecting distributed PV, assess costs of interconnection, and compare interconnection practices across various states in the Western Interconnection. The report addresses practices for interconnecting both residential and commercial-scale PV systems to the distribution system. This study is part of a larger, joint project between the Western Interstate Energy Board (WIEB) and the National Renewable Energy Laboratory (NREL), funded by the U.S. Department of Energy, to examine barriers to distributed PV in the 11 states wholly within the Western Interconnection.
Original languageAmerican English
Number of pages66
StatePublished - 2018

NREL Publication Number

  • NREL/TP-6A20-71232


  • best practices
  • interconnection
  • solar
  • state policy


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