On 27.07.2021 scientists from Lublin University of Technology , prof.Grzegorz Litak and prof. Piotr Wolszczak together with scientists from University of Catania had an online meeting with scientists from Chemnitz University of Technology (prof. Olfa Kanoun, Dr. Sonia Bradai, Dr. Slim Naifar) to talk about energy harvesting issues.