 The three rows of heliostats furthest away from the tower are having their mirrors replaced by solar cells.Of these cells, some will follow the sun while others will not, so as to measure the difference in efficiency.The CNRS rehabilitation project has repaired half of the heliostats in order to develop a power of 1 MWe, by means of a gas turbine installed at the top of the tower, fed either with hot air directly from an air receiver (PEGASE project) or a receiver with particles which also serves to store thermal energy