1 On-line fault diagnosis and fault state classification methods for PV power generation systems 2 Fault diagnosistechniques for solar plant based on unsupervised sample clustering and probabilistic self-learning, wavelets, ANFIS, and neural network model 3 Intelligent system for remote diagnosis of solar PV arrays 4 Maintenance strategies forsolar plants 5 Effective cleaning of PV panels using IoT based sensor networks 6 Optimization modelling techniquesfor energy forecasting and condition-based maintenance in PV plants 7 Deep learning-based predictive maintenanceof photovoltaic panels References