Laboratory testing has revealed that some negatively-doped, “n-type” tunnel oxide passivated contact (TOPCon) and heterojunction (HJT) solar modules are susceptible to ultraviolet (UV) light-related damage and degradation. That could mean trouble down the line, if modules in the field begin to show UV-related performance loss. Manufacturers are implementing solutions at cell and module level.

European industry association PV Cycle estimates a 10 MW solar site will eventually produce 700 tons of waste material. It is becoming increasingly clear that PV modules need end-of-life protocols – for the technology and material processing, and the regulatory environment.

Renewable Energy Expo India (REI) returns to Greater Noida at the start of October, for what will be its 17th edition. For the second year running, The Battery Show India will run concurrently with REI. pv magazine had the chance to catch up with Julian Thomas, Senior Project Director at show organizer Informa Markets, to discuss why electric vehicles and energy storage are now the key to India’s energy transition.

Scientists in Spain tested PV modules under partial shading conditions, aiming to better understand the formation of performance-damaging hotspots. The study reveals a potential issue particularly affecting half-cell and bifacial modules, which may cause accelerated performance loss and is not covered by current testing/certification standards.

Scientists in Ireland investigated the effect of shunt resistance on a PV cell’s electrical performance. The group says its finding could potentially lead to the development of models for early detection of various forms of cell degradation, allowing for intervention to repair or replace components before major power losses occur.

A study by TÜV Nord in Malaysia shows that the latest generation of tunnel oxide passivated contact (TOPCon) modules surpass their older rivals on energy yield. The researchers compared n-type TOPCon modules with older p-type PERC modules, both manufactured by JinkoSolar over a three-month period earlier this year. The newer product showed an energy yield 5.69% higher than its PERC counterpart.

Scientists in Norway used various imaging and characterization techniques to analyze the cells and other components of silicon PV modules that had been installed in the field for more than 10 years. The group’s aim was to isolate the role of moisture in various mechanisms that cause performance loss over time, and to understand how these mechanisms progress over long-term installation in real outdoor conditions.

Scientists from the Vellore Institute of Technology in India carried out a comprehensive study into the impacts of soiling on PV modules – measuring the amount of performance loss caused by different types of dust and bird droppings, and for modules installed at various tilt angles, in the hot-dry climate of Vellore in southern India. Their findings could allow developers to better take into account and mitigate the effects of soiling during site selection and system design.

The new edition of the International Technology Roadmap for Photovoltaic (ITRPV), published this week, finds that 295 GW of PV modules was shipped in 2022, and that prices for silicon PV modules fell by 7% over the year. The report finds that price premiums for n-type modules are now marginal, and the technology grew to represent 15% of the market, and is expected to keep growing over the coming decade.

Data collected from a 30 MW PV project in China’s Tianjin Province demonstrates that n-type tunnel oxide passivated contact (TOPCon) modules achieve a little more than 5% more energy yield than p-type PERC. Analysis by JinkoSolar, which supplied its TOPCon modules to the project, credits the n-type modules’ increased performance to a better temperature coefficient in the project’s hot climate, higher bifaciality and lower degradation.