Analysis and comparison of performance of photovoltaic systems from the “Counting the Sun” public awareness campaign on PV performance

O. Tsafarakis, W.G.J.H.M. van Sark

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

Detailed analysis of 5000 systems that took part in the 2014 measurement campaign “Counting the
Sun” was performed as besides the weekly yield also system descriptions were available. With average energy yield
of 33.4 kWh/kWp, and average performance ratio of 0.74 for all systems, performance ratio was found to be
dependent on the ratio of inverter DC nominal power and system DC rated power. For low cost inverters, this ratio
was 1.16, while for high cost inverters it was 0.95. Apparently, expected better performance does not warrant higher
capacity inverter, in the case of high cost inverters. However, due to the 1-week period, performance ratio was found
not to be dependent on this ratio. Also, different components (modules, inverters) do not conclusively influence
performance ratios. A longer monitoring period is expected to lower variation of these values such that statistically
relevant differences can be observed.
Original languageEnglish
Title of host publicationProceedings of the 31st European Photovoltaic Solar Energy Conference
PublisherWIP Wirtschaft und Infrastruktur GmbH & Co. Planungs-KG
Pages2237-2240
ISBN (Print)978-1-5108-2013-5
Publication statusPublished - 2015
Event31st European Photovoltaic Solar Energy Conference - Hamburg, Germany
Duration: 1 Sept 2015 → …

Conference

Conference31st European Photovoltaic Solar Energy Conference
Country/TerritoryGermany
CityHamburg
Period1/09/15 → …

Keywords

  • PV performance
  • inverter to system power ratio
  • cost
  • performance ratio
  • valorisation

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