Volume 18: Sustainable Energy Solutions for a Post-COVID Recovery towards a Better Future: Part I

Does Oversizing Improve Prosumer Profitability in a Flexibility Market? – A Sensitivity Analysis using PV-battery System Babu Kumaran Nalini, Michel Zade, Zhengjie You, Peter Tzscheutschler, Ulrich Wagner



The possibilities to involve small-scale prosumers for ancillary services in the distribution grid through aggregators and local flexibility markets question whether it is profitable for prosumers to oversize proactively. In this analysis, a Python model is developed to identify the cost-optimal operation plan of the PV-battery system and to evaluate the device flexibility. An economic assessment is carried out to derive the cost-benefit of sizing based on the mean electricity price. A sensitivity analysis is performed with the above results to study the profitable sizing of PV battery systems with flexibility services. The results show a promising advantage of oversizing although limitations prevail with the extent of flexibility services offered.

Keywords Prosumer, Flexibility, PV-battery systems, Local flexibility markets, Sizing, Sensitivity

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