Solar energy is free. Are you now using them for photovoltaics, for solar thermal energy or even for both. With solar support, even the most efficient system can work with less pollutants and thus contribute to climate protection. In addition, you are even more independent of fossil fuels. If you use solar thermal energy with heat pumps, a boiler and a wood-burning stove with a layered storage tank, the question quickly arises of how you can combine all of these or just parts of them. With the right systems, these components can be ideally connected to one another, thus protecting the environment and saving money. So the view remains free for the essentials in life.