Copper-Indium-Gallium-di-Selenide or CIGS panels are one of the promising alternatives in the market for thin-film solar technologies. CIGS panels are lightweight, durable and use less semiconductor materials as compared to Si-based PV modules [1, 2]. According to EU CRM materials report 2020, indium and gallium which are raw materials for CIGS panels are rated as critical materials subject to their high supply risk and moderate economic importance [3]. Hence, developing process for recycling of CIGS panels and production waste is a viable alternative to secure supply of CRMs. Numerous recycling processes and patents have been developed by researchers for CIGS recycling. Although, some of the recycling processes are effective and feasible but they either are successful in achieving the separation of materials or high purity of material. Furthermore, some processes use a highly toxic environment and lead to secondary waste from recycling process. The undertaken study compares conventional and electrochemical leaching for separation and recovery of materials from CIGS solar panels. The scope of study is to compare behaviour of end-of-life CIGS panel material in HCl, H₂SO₄ and H₃C-SO₂-OH (Methanesulphonic Acid). The investigation includes the study of separation efficiency of the glass and coating material at different acid concentrations. Also, the behaviour of feedstock at varying temperatures is intensively examined. Electrochemical leaching includes use of lab scale drum electrode for uniform surface contact with the CIGS sample material. Within the study, sustainability analysis of the processes from economical, ecological, and social aspects are briefly discussed.