A decade ago there was a report of a housing scheme in Alberta where solar thermal on garage roofs was used to heat the ground below. Extracted by GSHP during the winter. If it works there, it'll work anywhere. And there's a house in our village in Shropshire which has a similar system installed - don't know the economics though.Demand response is a cheaper answer.
When we electrify heating, we will need seasonal storage too which is a challenge for both batteries and demand response. In Denmark they are injecting heat to aquifers which can be extracted in the winter for district heating.