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Simulation of Grid-Tied PV Systems with Battery Storage in PVsyst
A. Mermoud, A. Villoz, B. Wittmer
Grid-Connected, Performance, Simulation, Sizing, Software, Storage, Modelling / Modeling
PV Systems and Storage – Modelling, Design, Operation and Performance
Subtopic: Storage
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5CV.3.55
1526 - 1531
ISBN: 3-936338-60-4
Paper DOI: 10.4229/EUPVSEC20192019-5CV.3.55
0,00 EUR
Document(s): paper


Grid-tied PV systems with battery storage have become a common view in many countries, not only for small residential PV systems, but also for commercial and utility scale installations. The battery storage in a PV system allows to displace the usage of the solar generated power to times where consumption or injection is needed or possible. The correct sizing of the PV and storage capacity for these systems is challenging, and depend on climatic factors, geographical location and power dispatch strategy. An accurate simulation of the system over one full year allows to make good design choices and check them under varying conditions. PVsyst is a simulation software that allows to model PV systems, from small residential size up to large utilities. Since end of 2018, the PVsyst software has implemented the possibility to model Grid-tied PV systems with battery storage. Three different dispatch strategies have been foreseen, namely peak shaving, maximizing self-consumption and weak grid support. After briefly discussing the approaches used for modeling these systems, simulation results are presented for all three strategies at different operating conditions. It is shown how the sizing of the PV array and the battery impact on the system performance. General conclusions are presented, as well as individual aspects that need special care, to achieve an optimal battery and PV sizing.