The recent expansion of photovoltaic (PV) systems and increased production scale necessitate enhanced monitoring to assess system performance, detect potential degradation, and identify imminent failures, ensuring sustained quality and optimal performance throughout their lifecycle. However, the requirement for sophisticated and costly monitoring systems generally restricts their use to larger-scale residential and commercial sectors. The TERRASOS Project (POR CAMPANIA FESR 2014/2020) addressed these challenges through deep investigation and field experiments. MEDIACOM SRL developed a performance prediction system that minimizes parameters’ count, simplifies hardware requirements, reduces transmission bandwidth, and shortens processing times. Obtained results are promising, and enable a broader and costeffective adoption of PV systems.