Articles written by Erik Wallnér

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Research & Development
Researchers reduce losses in organic solar cells by restricting emission angle Spanish researchers have developed an optical cavity that reduces Boltzmann losses in organic solar cells by restricting photon emission angles. The approach could help push single-junction solar cell efficiencies beyond the Shockley-Queisser limit.
Pilar Sánchez Molina
Oct 11, 2026
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Technology & Products
Free software calculates how many solar modules fit on a rooftop from a photo Tegrona has launched free software that uses photographs to calculate how many PV modules can fit on a rooftop. Tegrona Lite corrects image perspective, determines roof dimensions and automatically generates module layouts without requiring CAD tools or on-site measurements.
Pilar Sánchez Molina
Sep 27, 2026
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Markets & Policy
Investments in co-located solar-plus-storage reach $35 billion in H1, says BloombergNEF Investment in co-located solar-plus-storage hit a record $34.88 billion in the first half of 2026. According to BloombergNEF, the figure was nearly double the total recorded in H2 2025 and three times the amount invested in H1 2025, with the United States and Australia leading investment in the segment.
Pilar Sánchez Molina
Sep 01, 2026
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Markets & Policy
Sungrow leads first global BESS integrator ranking as market tops 100 GW Wood Mackenzie has ranked Sungrow as the world’s leading battery energy storage system integrator in its first global assessment, as annual installations surpassed 100 GW for the first time.
Pilar Sánchez Molina
Jul 14, 2026
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Technology & Products
Axial introduces 160 m-long single-row tracker The Spanish manufacturer said its new tracker is designed for large-scale projects with ample land availability, such as desert sites or other open areas where long, continuous rows can be fully optimised.
Pilar Sánchez Molina
Jun 30, 2026
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Applications & Installations
Data centre energy spend rivals global solar investment Rystad Energy says capital expenditure on data centers reached $1,086 billion in 2025, matching investment levels in photovoltaic infrastructure and surpassing upstream oil and gas.
Pilar Sánchez Molina
Apr 09, 2026
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Applications & Installations
Global solar capacity to reach 6 TW by 2031, says GlobalData UK consultancy GlobalData says global renewable capacity will more than double to 8.4 TW by 2031, with PV reaching nearly 6 TW, a 13% compound annual growth rate from 2025 levels of 4.1 TW.
Pilar Sánchez Molina
Mar 15, 2026
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Research & Development
Mercedes unveils car with 20% efficient ultra-thin solar coating Mercedes-Benz has unveiled a prototype car with a silicon-free, 20%-efficient nanoparticle solar coating that powers the vehicle even when off and uses modules thinner than a human hair.
Pilar Sánchez Molina
Oct 21, 2025
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Research & Development
New open-access simulation software for solar cell modelling Developed by a professor at the Polytechnic University of Catalonia, the Soley software is claimed to enable precise optoelectronic modeling of photovoltaic devices and accurately reproduce the behavior of photodiodes under illumination.
Pilar Sánchez Molina
Sep 24, 2025