The Department of Industrial Engineering at Ankara Yildirim Beyazit University, Turkey, has conducted a study to evaluate how solar PV stakeholders perform in implementing circular economy principles. As per the university, a spherical fuzzy TOPSIS methodology was used to address ambiguity in expert assessments and rank stakeholders based on power and interest. The study has investigated practices like panel lifespan extension, recycling effectiveness, and raw material recycling, in line with SDG 7 and SDG 13 goals. Based on the findings, there were various stakeholders who did not have proper influence or alignment with circularity objectives along the solar PV supply chain. The research has highlighted the urgency to make strategic changes to improve stakeholder effectiveness and handle intricate sustainability choices using better evaluation methods.