The generation of energy from fossil fuels and renewable energies have an important common ground:

Energy is often generated in times when it is not needed and must be stored for a later time.

Here classic buffer storage tanks and hot water storage tanks, especially hygienic storage tanks or hygienic stratified storage tanks are a focus point of developments.

With these storage tanks, there is usually no risk of legionella as the domestic hot water is heated in continuous flow mode.

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.