The Impact of self-consumption regulation on individual and community solar PV adoption in Switzerland: an agent-based model

The new Energy Act in Switzerland came into force in January 2018 with very encouraging provisions for community solar PV systems - clearer financial and legal structures under the ZEV (Zusammenschluss zum Eigenverbrauch). However, there is no ex-ante scientific research as to how this new policy will fare, especially with changing electricity prices and falling solar PV costs. Agent-based modelling is a useful technique to simulate the adoption of new technologies and is used for community solar PV adoption in this work. The agent-based model developed in this research uses energy data generated from a district model of nearly 2000 building blocks in the city of Zurich using the City Energy Analyst (CEA). This approach is used to analyse the dynamic levels of adoption of individual and community solar PV systems when modelling factors such as geographical location of agents, environmental attitudes and peer effects, electricity and solar PV prices as well as legal regulations. A scenario without any such regulation is also modelled for comparison. The current work indicates that adoption levels are exceeded with the large building blocks considered, and the ZEV regulations do incentivize community PV system adoption for greater adoption levels at better system economics.