Today, there are seasonal thermal energy storage facilities that store solar energy during summer. These facilities use technologies such as:
Underground thermal energy storage
Borehole thermal energy storage
Aquifer thermal energy storage
Mine-thermal energy storage
This type of solar energy storage collects heat from solar collectors for use in cold seasons.
A practical example of such a system is the solar hot water storage tank. This tank heats domestic cold water with heat energy from solar panels.
You can observe such tanks on the roof in many solar-operated houses.