Technical Papers

The rapid evolution of photovoltaic technology has continued, as modules with peak power outputs in excess of 550W are emerging fast. Driven by a thirst for more power and increasingly larger cells, developers and EPCs now face tougher procurement decisions than ever before. But is the industry ready for such a jump?

Our ability to generate renewable energy is scaling up fast, and solutions to integrate that energy will rely on technologies like blockchain to help keep new solutions on track. Power Ledger’s executive chairman and co-founder, Dr Jemma Green, looks at the role blockchain plays within her company’s platform to integrate and automate solar energy trading and balancing.

The optimal integration of distributed energy resources such as solar, battery storage and smart thermostats becomes an ever-more complex and pressing question. Rahul Kar, general manager and VP for New Energy at AutoGrid Systems looks at the role artificial intelligence can play in smarter energy networks.

Battery system integrators must navigate a broad array of technologies and varying market drivers when putting systems together. Andy Colthorpe speaks to Powin Energy and Sungrow about the engineering challenges involved in building lithium-ion battery storage systems at scale.

In the second of a two-part series for this journal, Jens Noack, Nataliya Roznyatovskaya, Chris Menictas and Maria Skyllas-Kazacos from CENELEST, a joint research venture between the Fraunhofer Institute for Chemical Technology and the University of New South Wales, examine the potential of vanadium redox flow batteries in the future energy system.

José Rojo speaks to Roger Font of Banco Sabadell for his take on the financing landscape for unsubsidised PV projects following the COVID-19 outbreak.

The growing volumes of variable solar and wind generation on the grid raise the risk of depressed wholesale prices, particularly at times of high generation and low demand. James Brabben of Cornwall Insight explores the phenomenon of so-called price cannibalisation and how its most serious potential impacts on the renewables industry can be avoided.

The era of subsidy-free solar is well underway in a growing number of markets, with Europe leading the way. As  Solarcentury’s Peer Piske explains, the greater sensitivities around modelling zero-subsidy projects mean new approaches to design and planning are required by developers.

Many of the bifacial modules now offered by PV manufacturers employ bifacial passivated emitter and rear cell (PERC+) technology, making them vulnerable to rear-side potential-induced degradation, in addition to the conventional front-side shunting type (PID-s). Kai Sporleder, Volker Naumann, Stephan Großer, Marko Turek and Christian Hagendorf of the Fraunhofer Centre for Silicon Photovoltaics report on new testing methods designed to quantify the expected power PID-related losses in bifacial PERC+ modules in the field.

Understanding of LeTID remains incomplete, although its effects on PV power plant performance are recognised as being potentially significant. Tabea Luka, Friederike Kersten, Matthias Pander, Max Koentopp, Marko Turek, Werner Bergholz and Thomas Pernau of the LeTID Norm consortium outline progress towards developing a standardised test for the defect, a key step in minimising its impact.