[renault_megane_dci]

Thank you for the input.

I guess I can review my expectations down to what you suggest.
The size of the battery pack you are stating does not look awfully big to me, bearing in mind we just got rid of a motorbike engine wich uses pretty much that space (air box / mufflers and such included) and has the same weight.
I know we also require electric controller and maybe an inboard charger.

If split in two, 23 kgs rolling suitcases is not a NO NO if it is the only way to have your bike charged at night.
It is also a good anti theft device since 2 to 3 K$ worth of batteries might attract those in the need

And by the way, 40 mph average on a bicycle frame sounds like something I wouldn't want to do daily ...