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IEA PVPS Press Release
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International Energy Agency
Photovoltaic Power Systems Programme
PRESS RELEASE
Paris, France, 25 January 2021 – The Task in charge of Performance, Operation and Reliability of Photovoltaic Systems (Task 13) of the IEA PVPS has recently published a new report detailed below.
Uncertainties in Yield Assessments and PV LCOE

Yield assessments (YA) and Long-Term Yield Predictions (LTYP) are a prerequisite for business decisions on long term investments into photovoltaic (PV) power plants. Together with cost data (CAPEX, OPEX and discount rate), the output of a YA and LTYP (utilisation rate, performance loss rate and lifetime) provides to the financial investors the parameters needed for the calculation of the Levelised Cost of Electricity (LCOE) and to assess the cash flow model of an investment with relative Internal Rate of Return (IRR) and Net Present Value (NPV).

One of the most relevant question that the Task 13 has tried to answer in this report is the following: How reliable are YA’s? Seven highly skilled specialists did not arrive at the same result in the two benchmarking exercises. From an industry perspective, it would be beneficial if more “live” post-mortem analyses (i.e. comparison of the LTYP and measured data, every 5 years of system life) would be made and published.

They also conclude that together with the previous report , they have provided all the needed information to understand if one YA is more reliable than another and which input and output data must be provided by the assessor to reach this conclusion.

The report is available here 

About the IEA PVPS Task 13
Task 13 was established in 2010 within the IEA PVPS Programme in order to continue to research activities on performance and quality issues started in the former Task 2. It is today one of the most respected Tasks within the programme, with contributors from all over the world.
The Task is co-managed by TÜV Rheinland and the Fraunhofer-Institut für Solare Energiesysteme ISE, both from Germany.

Contacts for Further Information:
Ulrike Jahn, Task 13 Operating Agent - ulrike.jahn@de.tuv.com
Boris Farnung, Task 13 Operating Agent - boris.farnung@ise.fraunhofer.de
The International Energy Agency (IEA), founded in 1974, is an autonomous body within the framework of the Organization for Economic Cooperation and Development (OECD). The Technology Collaboration Program (TCP) was created with a belief that the future of energy security and sustainability starts with global collaboration. The program is made up of thousands of experts across government, academia, and industry dedicated to advancing common research and the application of specific energy technologies.
The IEA Photovoltaic Power Systems Programme (IEA PVPS) is one of the TCP’s within the IEA and was established in 1993. The mission of the programme is to “enhance the international collaborative efforts which facilitate the role of photovoltaic solar energy as a cornerstone in the transition to sustainable energy systems.” In order to achieve this, the Programme’s participants have undertaken a variety of joint research projects in PV power systems applications. The overall programme is headed by an Executive Committee, comprised of one delegate from each country or organisation member, which designates distinct. ‘Tasks,’ that may be research projects or activity areas. This report has been prepared under Task 1, which deals with market and industry analysis, strategic research and facilitates the exchange and dissemination of information arising from the overall IEA PVPS Programme. 

The IEA PVPS participating countries are Australia, Austria, Belgium, Canada, Chile, China, Denmark, Finland, France, Germany, Israel, Italy, Japan, Korea, Malaysia, Mexico, Morocco, the Netherlands, Norway, Portugal, South Africa, Spain, Sweden, Switzerland, Thailand, Turkey, and the United States of America. The European Commission, Solar Power Europe, the Smart Electric Power Alliance (SEPA), the Solar Energy Industries Association and the Copper Alliance are also members. 
 
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