The ERockit Pedal-Electric Bike looks interesting but at 110 Kg in weight it should probably be called an light electric motorcycle. With an 8KW motor the ERockit name would be pretty apt. But when the battery dies it is going to be a pain to pedal thats for sure considering the motorcycles weight. It would definitely be within the power requirements for a large domestic solar installation for solar charging though. The ERockit lithium battery could also double up as an emergency mobile storage power source which seems to be specified at an equivalent battery around 240Ah at 12V.

The Germans are heavily into domestic solar PV and I would suspect this product will be a commercial success within Germany if the price is right. It probably wouldn't take much to produce a solar PV covered trailer for hauling kit around as well.