Physics-based electrical modelling of CIGS thin-film photovoltaic modules for system-level energy yield simulations

Abstract Copper indium gallium selenide (CIGS) is a commercialized, high-efficiency thin-film photovoltaic (PV) technology. The state-of-the-art energy yield models for this technology have significant normalized root mean square error (nRMSE) on power estimation: De Soto model—26.7%; PVsyst model—12%. In work, we propose physics-based electrical model CIGS which can be used system-level simulations by people across the PV value chain. was developed considering of current pathways from literature and adapting it simulation. We improved further incorporating temperature irradiance dependence parameters through characterisation at various operating conditions. also devised module level, non-destructive characterization strategy based readily available measurement equipment to obtain parameters. validated using measurements multiple commercial modules has significantly lower estimation nRMSE 1.2%.