The Finnish-designed Hupi trailer takes on a fixed-roof caravan design, rising well above the electric bicycle saddle to create a more spacious interior complete with a bedroom and tiny dinette. On the top of that 59-in-high (150-cm) roof, the available solar kit harnesses the power of the sun for use powering interior accessories and keeping the ebike charged and ready to ride.The Hupi was designed by a DIY tinkerer like those mentioned above, only he wasn't an avid cyclist, from the sounds of it. In fact, inventor Urpo "Upi" Merranmaa conceived the idea when trying to find a use for the ebike he was given as a gift. He aspired to take a multi-day trip but didn't like the idea of staying in a tent. So he began the process of putting together a self-built trailer for his journey.