Performance of air cooled ORC geothermal power systems are inversely related with ambient temperature, where summer temperature extremes can cause performance drops of up to 70% from design. Concentrating Solar Thermal power generation systems act inversely, almost in harmony, reaching peak efficiency during most of these ambient temperature extremes. The two thermal generation systems constitute suitable candidates for hybridization, as a way of “hedging production against ambient temperature fluctuations”. BM Holdings is currently developing this concept in its Gümüşköy GEPP that is under construction, where the existing 6.6MWe geothermal power unit shall be complemented by a CSP system of adequate size in order to improve overall system efficiency while keeping a manageable Levelized Cost of Electricity (LCOE). A pilot solar field is planned to be erected in 2012 and full scale implementation is planned for 2013