RENEWABLE energy sources are unlimited, do not pollute, do not release carbon dioxide and are everywhere. The sun and heat from the earth or water are available in all countries; there are no transportation risks and they represent the FUTURE. In some cases, however, alternative or renewable energies are not capable of providing a fully independent and significant contribution to the global demand for energy: this may be due to technical or cost-related issues, or to territorial invasiveness. This leads to the use of hybrid systems, especially in residential buildings and in connection with retrofit work.

Components for renewable energy systems