Sun Trip , Sun Trip: the world on solar bikes!
The Sun Trip The Solar Bike Adventure
Adventurers on solar bikes choosing their course through Eurasia. Inspired by unassisted yacht races around the world, the Sun Trip is writing a new page in the world of overland adventures.

The Sun Trip is a showcase for new forms of mobility. Each adventurer is an ambassador of solar energy and eco-mobility, proving their efficiency and their humanist dimension.
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Patrick B

Patrick B

Nationality German

Patrick, the electrical engineer !

Patrick studied electrical engineering and computer science. Currently working as an engineer for industrial process automation in chemical plants.

A real “DIY” person, with experience in servicing/repairing cars/motorcycles, programming in Windows and microcontrollers and in the last time more and more designing / machining / welding metal parts.

Welcome and fair winds on its journey !

Solar bike project

Base bike is a HP Velotechnik Scorpion FS 20
– Rohloff Swap. Found a used Scorpion with Rohloff, bought it and stripped it for its rohloff. Did a complete maintenance, powder coated the housing, swapped the cap for the disc-brake version.
– Custom made solar panels with 550W (already in my garage)
– 2x Grin All Axle Motors for the front wheels with 2,5kW each (this is a real challenge to mount them, because there is no torque adapter in existence for a Scorpion. But in the end it is all-wheel-drive where the peak power is limited by the small shunt resistor used by the Databox. At the early design time I was not aware there would be a shunt, I assumed it would be a Hall sensor, but after I found out, it was already too late. I just hope that 1,5kW in total will be enough.
– Custom build battery with Samsung 21700 40T cells, maximum allowed capacity, theoretically capable of delivering 5 kW and chargeable at a maximum of 1,7kW (13×6 cells, 4000mAh each, rated for 1,5C max. charge). Bluetooth BMS rated for 100A. Even the nickel strips are over engineered / overkill, but I prefer that kind of construction.
– Solar roof will be built of custom made aluminium joints and carbon fiber tubes, also pretty tricky
– Tires will be Schwalbe Cargo once they are available (20″), otherwise Schwalbe Big Ben or regular Marathon plus

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