How about a big mirror + magnifying glass on the roof that can remotely focus the winter sun. It might be slow but fun except when overcast.
https://en.wikipedia.org/wiki/Heliostat
There's a Dutch company selling such things to get more sunlight in your house:
> Practical Solar’s[0] web site states that residential customers also use their heliostats for direct space heating, drying mold, melting ice dams on roofs, and melting snow.
Even thinking about the possibility that one day the sun might be seen makes me emotional.