Sorry, no idea…
For your (for me unimaginable) distances I’d look anyway for an electric (folding) bike… 
I’m much more bike mechanic than rider, distance to work is just 2 km (one direction) and I ride at optimal conditions only (not too warm/cold, not windy, no rain…), otherwise I prefer to walk…
All I know is that it must be possible:
To The North Sea