E+ Bikes, Electric Motion Systems
Electric Motion Systems is the successor to Wavecrest Labs, designer of a very interesting hub motor system for the Tidalforce line of electric bicycles. Tidalforce doesn't exist now but the design and everything else is now Electric Motion Systems.
The design has a hub motor in the rear wheel, and in the front wheel a battery pack. They say the purpose is to distribute weight evenly and to ensure a low center of gravity.
It's a very high quality and rugged system which they say is
Designed to withstand a variety of conditions, the E+ has gone through rigorous performance and environmental testing. The system is entirely waterproof, ensuring that it can endure both on-road and off-road conditions.
They sell the system as a kit allowing conversion of any bicycle. They sell a wide range of bicycles with the kit installed.