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Description of the organisation

The CENTRE FOR RENEWABLE ENERGY SOURCES AND SAVING (CRES) is the national coordination centre of Greece on renewable energy and energy saving technologies and the official Greek government consultant in national policy, strategy and planning. CRES is the Greek National Centre for Renewable Energy Sources (RES), Rational Use of Energy (RUE) and Energy Saving (ES). CRES has participated in more than 700 European, national and international projects. These include applied research and technological development projects, demonstration and/or commercial application projects, energy policy studies, development of energy information systems and energy modelling, investment feasibility studies, techno-economic feasibility studies, environmental impact assessments, market research as well as activities for the promotion and dissemination of RES/RUE and ES. The Department is involved in applied research, having the capability to conduct development, characterization testing and experimental procedures according to international standards. It cooperates systematically with organisations for the promotion of PV technology and Distributed Generation, such as EPIA, DERlab, and actively participates in European initiatives.

Main contact

Stathis Tselepis

+30 210 6603370




Role in the Project

In the CHEETAH program, CRES will participate in the CSA activities. CRES is playing an important role in the establishment of collaboration framework between the partners with relevant infrastructure initiatives and in reviewing the available European research infrastructures in the field of photovoltaics, in order to cover all topics in PV research area.

Furthermore, CRES is taking part in the evaluation of the quantity and quality of access to the common infrastructure, by utilizing best practices methodology to improve the impact of each initiative. The methodology issues addressed for the evaluation are the effectiveness of communication channels with user communities, user support (logistics), access rules for interested researchers and other interested entities, documentation exchange – free data, IPR protected access, identification of the effective dissemination channels to give high publicity to infrastructures access activities and general protocol for actual costs calculation.

Although, there are already significant PV facilities in Europe, CRES is assisting in the effort of checking if the existing facilities fulfill the present and future needs of the industrial sector and scientific communities.

CRES is taking part in the development of a detailed plan for researcher exchange between the partners, as well as, in the organization of summer university courses and training workshops. Additionally, CRES is assisting to establish an integrated research program in specific research areas, to decide, where cooperation and exchange with research institutions from outside Europe will take place.

Moreover, CRES will be playing an important role in the characterization of thin film devices, standardization of efficiency and stability measurements beyond IEC standards, the influence of metastability effects (light soaking, healing, influence of temperature) and the influence of system components on module stability (e.g. grounding of inverter).

Furthermore, CRES will take part in these working groups for the development of future standards trying to reach a common document or at least, homogenous and compatible standards at EN and IEC level in the research area of BIPV.

CRES has solid experience in system development and testing and analysis of data for PV cells, modules and inverters. CRES is housing equipment for I-V curve tracing for cells and modules. One other major activity of CRES focuses on the outdoors single shoot and long term evaluation of performance of PV modules or arrays. Also, CRES is housing a climatic chamber for testing according to requirements of the international standards. Finally, CRES is offering technological services and consultation to the photovoltaic manufacturing industry and PV system sector in Greece.


Key people involved

Dr. Stathis Tselepis is the head of the Photovoltaic Systems and Distributed Generation department. He has been involved in more than 45 European and National R&DD projects since 1994. He is involved in projects dealing with PV cell and module testing and performance evaluation, photovoltaic system design, development, monitoring and evaluation, Hybrid systems, Microgrids with distributed energy resources, electric vehicle monitoring systems development and evaluation. He is responsible for the development of the laboratory for PV module, components and system evaluation at CRES. He is a member in various European organizations, such as: EPIA, DERlab, the European PV Technology Platform (WG3), a national expert in the European Electricity Grid Initiative (EEGI), a member of the Solar European Industry Initiative (SEII) team for photovoltaic and concentrated solar power and a member of the scientific committees of the European Photovoltaic Solar Energy Conference and the PV Hybrid and Mini-Grid Conference.



Dr. George Halambalakis graduated with the BSc (hons) degree in Physics from Heriot-Watt University of Edinburgh and with the PhD degree in Condensed Matter Physics from University of Montpellier. Since 2009, he is a researcher of the Photovoltaic Systems and Distributed Generation department at CRES. In the past, he has been awarded with the E-MRS “Best paper for young researcher award” in 2004. After his PhD he was working for 2 years at Philips Research Laboratories in Netherlands where he was developing the next generation PV systems. Then he moved at Demokritos NCSR research laboratory in Athens where he worked in the field of concentrated PV systems, for 2 years. He is the author and co-author of 11 papers.



Dr. Anastasios Kyritsis, received the Dipl.-Ing. and the PhD. degree in electrical and computer engineering from the University of Patras, Greece, in 2003 and 2009 respectively. He is currently working as researcher in the Department of Photovoltaics and DG Systems of CRES. He is mainly involved in the EC project, DERlab and DERRI. His research interests are focused on power quality improvement and renewable energy sources issues and especially photovoltaic systems.



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