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Economic Optimization of PV Systems with Storage
A. Mermoud, A. Villoz, B. Wittmer, H. Apaydin
Performance, Simulation, Sizing, Software, Storage, Grid Connected
PV Systems and Storage – Modelling, Design, Operation and Performance
Subtopic: Design and Installation of PV Systems
Event: 37th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5CV.4.4
1604 - 1609
ISBN: 3-936338-73-6
Paper DOI: 10.4229/EUPVSEC20202020-5CV.4.4
0,00 EUR
Document(s): paper, poster


Financial profitability analysis is a substantial preliminary study topic and a key decision criterion when designing and building a PV system. In this context, energy storage has increased the capability for maximizing the energy self-consumption and the profitability of PV systems, but it has also complexified the optimization strategies. Battery storage in a PV system allows to displace the usage of the solar generated power to times where consumption is needed. However, the sizing of the optimal system depends on many factors, such as meteorological data, load profile, battery size and price, feed-in tariffs, etc. PVsyst is a simulation software used to model PV systems, from small residential size up to large utilities. The new economic evaluation tool included in the software allows to perform a detailed analysis, producing key financial indicators such as the Levelized Cost of Energy (LCOE), payback time and return on investment (ROI). The aim of this study is to establish a methodology for the optimization of PV systems with self-consumption and storage. The optimization of several economic variables, based on parametric simulations, will be presented. We will also show a simple way to estimate the optimal sizing using the results of a single simulation.