There are just a few serious big companies like Bosch and Panasonic sharing the market of electric engines for pedelecs and s-pedelecs. This year (2014) they might get serious competition by the lightweight Brose E-Bike Engine from continental.
This continental engine weights just 3.4 kilograms which is 25 % less of the competitors. The new 240 times per second sensor allows an even power without any vibrations. Go for it Brose – competition is the best driver for prgress!