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🔥 How can we estimate the yield of rooftop solar #PV in energy system modelling considering the right yield without modelling each system on its own? 🔥 We thought ourselves, this is a good question. Therefore, me, Dmitrii Bogdanov, and Christian Breyer from LUT University, and our collaborator Stefan Krauter from Universität Paderborn investigated this topic in our latest paper, published in Wiley's Solar RRL journal #OpenAccess, following my presentation at this year's EU PVSEC as part of the SERENDI-PV project: https://lnkd.in/dHfP3jxU 📐 📏 As the basis we took fixed-tilted ground-mounted systems, which are easier to model and are included in basically every energy system model already. Going through literature, we identified several levels leading to yield losses of rooftop PV system compared to the ground-mounted ones. Additionally, we simulated residential #PV prosumers with and without the yield losses to check the impact on prosumer viability. 📊 📉 The results: ❗ Three loss levels were identified: Environmental (orientation, far shading), module (ventilation/temperature), system (inverter/string configuration, near shading). Residential systems show on global average 18% lower yield, commercial systems 7%, and industrial systems 4%. ❗ Optimal fixed-tilted system reach up to 2000 FLH, depending on the location. Losses for rooftop #PV up to 360 FLH in the sunbelt, in the Nordics up to 200 FLH. (➡️ Solar #PV prosumers were modelled with LUT-PROSUME, assuming a standard electric vehicle and electrification of the household for 145 regions globally. Check more here: https://lnkd.in/d_2R-Fmt) ❗ Installed #PV capacity changed by up to 18% by 2030, in some regions capacity is lower. By 2050 almost all regions substitute lower yield with higher #PV capacity. ❗ Stationary batteries show no clear change dependency, though there is a slight tendency towards smaller battery capacities in some regions. ❗ Annualised system cost increase up to 21%, by 16% on global average. Still, prosumer viability is not at risk, in all regions prosumerism is largely chosen over full grid supply. 🎯 Conclusions: Although the yield may be up to 18% less than for ground-mounted systems, prosumerism is still beneficial over grid supply. Many thanks to the Jenny and Antti Wihuri Foundation for the valuable grant. pv magazine Global, SolarPower Europe, TaiyangNews - All About Solar