This research aims to study the feasibility of applying real concentrated solar radiation to achieve the energy needed for melting glass fits. For this purpose, five glass compositions corresponding to different types of commercial flits were prepared. For comparison, the batches were melted by both in a solar furnace using concentrated solar energy (CSE) and in an electric furnace. The final flits were characterised by means of X-ray Fluorescence, X-ray Diffraction, Differential Thermal Analysis, Field Emission Scanning Electron Microscopy and Fourier Transformed Infrared Spectrometry. Results show that the fits prepared by CSE present short-range order, thermal behaviour and microstructure analogous to fits prepared in electric furnace. Moreover, the use of CSE for manufacturing glass fits reduces the melting time in about 80%, which leads to both lower corrosion of crucible wall and lower boron volatilization.