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DEPRECATED. SEE UPDATE LINK BELOW. Distribution System Upgrade Unit Cost Database

REVISED 1/2/2019. SEE UPDATE LINK BELOW. This database contains unit cost information for different components that may be used to integrate distributed photovotaic D-PV systems onto distribution systems. Some of these upgrades and costs may also apply to integration of other distributed energy resources DER. Which components are required and how many of each is system-specific and should be determined by analyzing the effects of distributed PV at a given penetration level on the circuit of interest in combination with engineering assessments on the efficacy of different solutions to increase the ability of the circuit to host additional PV as desired. The current state of the distribution system should always be considered in these types of analysis. The data in this database was collected from a variety of utilities PV developers technology vendors and published research reports. Where possible we have included information on the source of each data point and relevant notes. In some cases where data provided is sensitive or proprietary we were not able to specify the source but provide other information that may be useful to the user e.g. year location where equipment was installed. NREL has carefully reviewed these sources prior to inclusion in this database. Additional information about the database data sources and assumptions is included in the Unit_cost_database_guide.doc file included in this submission. This guide provides important information on what costs are included in each entry. Please refer to this guide before using the unit cost database for any purpose.
- Originated 11/30/2017 by National Renewable Energy Laboratory.

3 Resources

 NameSizeTypeResource Description
 Unit_cost_database_guide.docx155382text_documentThis guide provides a description of the data in this unit cost database, including available data, data sources and quality, definition of acronyms, and intended use. Please refer to this document prior to using the database.
 Cost_database_for_release_November_20_2017.xlsx49743dataThis is a database of unit costs of distribution system upgrades that could be associated with integration of distributed photovoltaic systems (D-PV), or possibly other distributed energy resources (DER). Please refer to the "Unit_cost_database_guide.doc" file for important information regarding the data in this database as well as intended use before using the data.
 2019 Distribution System Upgrade Unit Cost Database Current VersionwebsiteUpdated data submitted 1/04/2019. Refer to this dataset for the most current version (2019) of the unit cost database, including important information on data sources and intended use for the database.


NREL energy cost unit cost distribution systems distribution upgrades grid integration interconnection utility PV photovoltaic voltage regulators capacitor banks transformers reclosers and relays phase balancing hardware costs software costs bottom-up analysis


•  NOV  • 20 2017

National Renewable Energy Laboratory

by , 303.275.4347, Center 6A20, ORCID iD 0000-0002-6431-6931



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Cite this dataset:

Horowitz, Kelsey (2017): DEPRECATED. SEE UPDATE LINK BELOW. Distribution System Upgrade Unit Cost Database. National Renewable Energy Laboratory.

About this dataset

id 77
DOI 10.7799/1410672
Pub Number 70324
status Publicly accessible
last updated soon

DOE Project

EE0001650 Analysis of Distribution System Costs and Benefits Associated with DGPV

Research Areas

  • Energy Systems Integration
  • Grid Modernization
  • Solar Power

Additional Subjects

  • Energy Storage
  • Engineering
  • Photovoltaics
  • Solar Energy

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