1. Electrical Energy Storage, Ikerlan Technology Research Centre, Basque Research and Technology Alliance (BRTA), Arrasate/Mondragón, Spain
2. Electronics and Computing Department, Mondragon Unibertsitatea, Faculty of Engineering, Arrasate/Mondragón, Spain
3. R&D Department, Cegasa Energ}ia, Miñano, Vitoria, Spain