Abstract for: Difussion dynamics of 2nd life PV in Germany – Strengthening circularity in the solar industry

The unprecedented growth of photovoltaic installations raises the question of what is to be done with the increasing levels of waste coming from decommissioned, failed or degraded PV modules. An opportunity exists here for retired PV modules to be repaired or refurbished and commercialized as 2nd life panels. A similar situation is foreseen for lithium-ion batteries (LIBs) from electric vehicles, which, at the end of their automotive life, can be given a 2nd life and serve as stationary energy storage units for renewable energy sources, including solar. Just as with PV panels, waste projections for decommissioned EV batteries are alarmingly high for the next decade. Because the ecosystem in which panel reuse and battery repurposing takes place is a complex one, a tool which can help decision makers deal with the unexpected consequences of non-linear behaviors, accumulations, delayed cause-effect relationships is needed. This paper proposes the development of an SD simulation model to identify the dynamics involved in acceptance and diffusion of 1st and 2nd life PV and batteries in Germany. It is estimated the model will be capable of evaluating the long-term impact of policy interventions on relevant circular economy KPIs for 2nd life use of PV and batteries.