• Faults, Failures, Reliability, and Predictive Maintenance of Grid-Connected Solar Systems : A Comprehensive ReviewKull, Karl; Asad, Bilal; Khan, Muhammad Amir; Naseer, Muhammad Usman; Kallaste, Ants; Vaimann, ToomasApplied Sciences2025 / art. 11461 https://doi.org/10.3390/app152111461