5.6 future investments in the heat sector
Also in the heat sector the Energy [R]evolution scenario would require a major revision of current investment strategies in heating technologies. Especially the not yet so common solar and geothermal and heat pump technologies need enourmous increase in installations, if these potentials are to be tapped for the heat sector. Installed capacities need to increase by the factor of 130 for solar thermal and still by a factor of 10 for geothermal and heat pumps. These two technologies will be the main pillars of heat supply in 2050.
Renewable heating technologies are extremely variable, from low tech biomass stoves and unglazed solar collectors to very sophisticated enhanced geothermal systems and solar themal district heating plants with seasonal storage. Thus it can only roughly be calculated, that the Energy [R]evolution scenario in total requires around € 166 billion to be invested in renewable heating technologies until 2050 (including investments for replacement after the economic lifetime of the plants) - approximately € 4 billion per year.