There is now a page describing the electric assist system of Helix.

As usual, with Helix, the claims are partly fake.

This hub motor, from an almost unknown Chinese assist system supplier, is not really open, only the battery is open, the motor, display and control are proprietary and i do not think that the freewheel of this hub support any Shimano 12s cassette like claimed which explains why Helix use an 11s Shimano transmission (but with a 11-36 cassette that doesn't come from Shimano since the 11s road derailleurs from Shimano are according to Shimano limited to 11-34).

The low weight of the assist system is not due to a low weight hub motor (Mahle X20 weight 400g less than this Keyde P100) but to a low capacity battery that surely won't provide 100km range in typical use as claimed but is too big to be taken in an air travel.