For a continued decrease of levelised costs of energy from photovoltaics (PV), the prices of PV system components have to be further decreased while performance, functionality, reliability and lifetime on the component and system level need to be increased. In an integrated view, PV system performance emerges from, but is not limited to the performance of the components. The Performance Plus project focuses on the PV system rather than on the component level. The main idea of the project is to optimise the system as a whole rather than the separate components.The aim is to develop a collection of tools for modelling, monitoring and control of PV systems. All R&D results and models will be validated with empirical data. The realisations will be demonstrated. In order to ensure economic impact, possible pathways for exploitation will be explored jointly by the partners during the project execution.The tools will serve to optimize and enhance the performance, reliability and lifetime of commercial PV systems beyond the state of the art. Means for a better integration of PV-generated electricity into the power system shall be provided by methods for short-term forecasting, integrated energy management and storage control, PV system monitoring and control.Specific objectives are:- Robust system design modelling for diligent design and bankability- Robust operational modelling for optimising the system output- Integrated energy management and storage control- Real time monitoring and control: sensors communication and feedback- Hardware and software tools for testing- Validation, demonstration and target controlPerformance Plus will bring scientific knowledge far beyond the state of the art for each of the objectives listed. The project is scheduled for 36 months.