More than 30% of the energy consumed in Europe is used for heating buildings and domestic hot water. Solar energy is an interesting solution for achieving the European Union's objectives of reducing primary energy consumption by 20% and producing 20% of energy consumption from renewable sources. The use of solar energy makes it possible to supply heat in a simple and efficient way. But a conventional solar installation does not achieve energy autonomy in heating and domestic hot water because of the gap between the availability of solar energy and heating needs. In order to increase the solar fraction of such systems, it is therefore necessary to integrate a seasonal storage device. The surplus solar energy available in summer will meet the heat needs of buildings in winter. Sorption thermal storage is a very promising solution for compact and efficient seasonal storage.