Overcoming Communications Outages in Inverter Downtime Analysis

Kevin Anderson, Ryan Blumenthal

Research output: Contribution to conferencePaper

1 Scopus Citations


This paper presents two methods of detecting inverter downtime and estimating lost production from downtime events using timeseries system production measurements. The methods focus on distinguishing communications interruptions from true production outages and are successful in most cases. To enable fleet-scale analysis of inverter availability, the methods are designed to be semi-autonomous. The first method uses only inverter and system meter AC power measurements while the second uses cumulative production and expected energy data to classify outages and estimate lost production. The methods are demonstrated using real field data and the results are discussed.
Original languageAmerican English
Number of pages6
StatePublished - 2021
Event2020 47th IEEE Photovoltaic Specialists Conference (PVSC) - Calgary, Canada
Duration: 15 Jun 202021 Aug 2020


Conference2020 47th IEEE Photovoltaic Specialists Conference (PVSC)
CityCalgary, Canada

Bibliographical note

See NREL/CP-5K00-76022 for preprint

NREL Publication Number

  • NREL/CP-5K00-79282


  • inverters
  • meters
  • monitoring
  • power measurement
  • production
  • reliability
  • uncertainty


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