1. Department of Renewable Energy, National Advanced School of Engineering, University of Maroua, Maroua, Cameroon
2. Department of Electrical, Energetic and Automatic Engineering, National Advanced School of Agro Industrial Sciences, The University of Ngaoundéré, Yaounde, Cameroon
3. Department of Engineering Process, National Advanced School of Agro Industrial Sciences, The University of Ngaoundéré, Yaounde, Cameroon