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2019 Distribution System Upgrade Unit Cost Database Current Version

IMPORTANT NOTE This is the current version of NREL's Distribution System Unit cost Database and should be considered the most up-to-date. Compared to the previous version https// this database has additional data points and has been modified for improved usability. More information on the changes that have been made can be found in the attached file Unit_cost_database_guide_v2.docx. This guide also has important information about data sources and quality as well as intended use of the database. Please consult this database guide before using this data for any purpose. This database contains unit cost information for different components that may be used to integrate distributed photovotaic DPV 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. - Originated 01/02/2019 by National Renewable Energy Laboratory
- Originated 01/02/2019 by National Renewable Energy Laboratory.

3 Resources

 NameSizeTypeResource Description
 Cost_database_v2_2019.xlsx55503dataThis contains data on unit costs for different distribution system upgrades that may be associated with DPV integration. This is not representative of total integration costs on any given system. Transmission cost data are not included. Please consult the "Unit_cost_database_guide_v2.docx" before using this data for any purpose.
 Unit_cost_database_guide_v2.docx28432text_documentThis is the user guide for the most current version (2019) of the unit cost database, including important information on data sources and intended use for the database. Consult this before using the database for any purpose.
 Distribution System Upgrade Unit Cost DatabasewebsiteOriginal data submitted November 2017. DOI:


NREL energy data 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


•  JAN  • 2 2019

National Renewable Energy Laboratory

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Cite this dataset:

Horowitz, Kelsey (2019): 2019 Distribution System Upgrade Unit Cost Database Current Version. National Renewable Energy Laboratory.

About this dataset

id 101
DOI 10.7799/1491263
status Publicly accessible
last updated soon

DOE Project

EE0001650 Analysis of Distribution System Costs and Benefits Associated with DGPV

Research Areas

  • Energy Analysis
  • Grid Modernization
  • Solar Power

Additional Subjects

  • Energy Storage
  • Engineering
  • Photovoltaics
  • Solar Energy
  • Transmission/Distribution

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