In the north thermal energy storage is a viable solution, and those can store energy for months. You can dump heat into them in summer and still pull from it in winter.
Since heating is by far the biggest consumer of energy in winter, just taking care of that with stored thermal energy will deal with a big fraction of the energy storage needs.
Since heating is by far the biggest consumer of energy in winter, just taking care of that with stored thermal energy will deal with a big fraction of the energy storage needs.
We need more districting heating systems.