Winter heating is a significant energy demand that can be effectively managed through innovative heat storage solutions. In Marstal, Denmark, a large covered reservoir heated by solar thermal collectors in summer provides warmth for around half of the local residents in winter. Similar systems involving underground heat storage tanks and repurposed coal mines are gaining traction globally, with examples in Germany, Poland, and Tibet. These systems operate by storing excess heat during summer months and releasing it in winter, contributing to energy efficiency and cost savings. Water tanks in buildings, such as steel tanks equipped with solar panels, offer another method of storing heat for months. While more expensive than geothermal storage tanks, these water tanks provide efficient heating solutions for buildings and apartments. Geothermal energy storage in the ground is also utilized to supply warmth to existing buildings, with Berlin showcasing successful geothermal storage tank implementation. Additionally, the article highlights the emerging concept of seasonal hydrogen storage for heat. This technology involves converting excess solar power into hydrogen during summer, storing it in cylinders, and utilizing it in winter to produce electricity and heat via fuel cells. While hydrogen storage shows potential for district heating networks, it comes with higher costs and lower energy efficiency compared to other storage systems. Despite these challenges, hydrogen storage systems are seen as a valuable addition to achieve climate-neutral energy solutions on a larger scale. Overall, the diverse range of heat storage systems, including solar-powered reservoirs, geothermal energy, and hydrogen storage, presents a positive outlook for sustainable heating solutions worldwide. These innovations not only contribute to energy efficiency but also pave the way for a cleaner and more environmentally friendly approach to winter heating.