In the final work, the operating parameters of the concave parabolic solar concentrator were measured, using a new version of the heater with a concave surface. The introductory part explains the operation of systems that use concentrated solar energy with special emphasis on concave parabolic solar concentrators, or "solar dishes". In the practical part of the paper, a laboratory concaves parabolic solar concentrator. The measurement of the operating parameters of the concave parabolic solar concentrator was performed in real conditions, where data on the irradiated solar energy, as well as the volume flow and temperature of the circulating water were collected. Based on the measured values, changes in the values of concentrator and heater power and system efficiency were calculated and graphically presented. Finally, since the pre-existing measurements were performed using a flat-surface heater, a comparison of the results obtained and the differences in the operation of the system with respect to the type of heater was performed.