The Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU) "Marktanreizprogramm" program for renewable energies is an essential supporting measure for market penetration of renewable energies in the heat sector. The "Marktanreizprogramm" is being continuously scientifically evaluated in order to monitor the effects of measures. On behalf of BMU, the evaluation period 2009-2011 is coordinated by Fichtner. GFZ is working within this project in the field of deep geothermal plants.