the energy storage circuit 36 the second solar radiation receiver 56 includes one or more receiver panels onto which solar radiation is reflected by the heliostat field 24 molten salt circulating through the second solar radiation receiver 56 is thus directly heated during a charging cycle and subsequently pumped to a hot salt storage tank 40 heat can subsequently be recovered from the hot molten salt via a heat exchanger 44 as described above in connection with the power plants 20 46 of fig2 and 3 the power plant 52 can be operated in different modes as described above in connection with the power plants 20 46 the daytime operating mode of the power plant 52 can be varied by controlling the position of a subset 62 of the plurality of heliostats 26 in the heliostat field 24 this enables solar radiation to be reflected by the subset 62 of heliostats onto the first solar radiation receiver 54 mounted on the first tower 58 during a generation only operating mode or onto the second solar radiation receiver 56 mounted on the second tower 60 during a hybrid generation storage operating mode some of the heliostats 26 in the heliostat field 24 shown in.