Energy production from fossil fuels and renewable energies have an important thing in common: Energy is often produced in times when it is not required and needs to be stored for a later time. Here, besides the classic buffer storage tanks and hot-water storage tanks, especially hygienic storage tanks or stratified hygienic storage tanks are in the focus of developments. With these storage tanks, there is usually no risk of legionella formation as the domestic hot water is heated in continuous-flow principle. In the solar sector, a distinction is made between solar thermal energy for heating a medium and photovoltaic systems for the generation of power by using solar energy.
