Author
Jochen Siemer
Jochen joined pv magazine in 2023. He began working as a freelance journalist in 1988. A few years later, he found himself focusing on renewable energies. Since 2021, he has dealt exclusively with photovoltaics in all its aspects – from scientific studies on the development of the global market to the product presentation of a new roof hook.
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Articles written by Jochen Siemer
German energy market records 78 hours of negative prices in May
Rabot Charge’s monthly analysis shows significantly more hours with negative prices on the Germany electricity market than in April. However, the average price in daily transactions was €6.72 ($7.32)/kWh – higher than in the previous month.
Jun 04, 2024
PI Berlin, PVEL, Extel Energy unite under Kiwa brand
PV Evolution Labs (PVEL), Extel Energy, and PI Berlin have unified under the Kiwa brand. Dutch company Kiwa, which has acquired the three PV testing laboratories over the past three years, says it aims to more effectively present its range of services for the solar industry.
Apr 03, 2024
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Fraunhofer ISE opens module lab in old Solar Fabrik factory
The Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE) has opened a PV module production lab for new product ideas in a former Solar Fabrik factory in Germany. It is equipped with systems for cell interconnection, laminators, and a range of materials and solar cell technologies.
Feb 21, 2024
‘Shallow defects’ key to high efficiency of perovskite solar cells, say researchers
Researchers at the Jülich Research Center in Germany have used novel photoluminescence measurements to analyze the recombination of charge carriers in perovskite solar cells. They have found that the loss of charge carriers in perovskite devices works differently from other types of PV cells.
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