I started with a trike, and added a cheap direct drive ebike kit (Voilamart), and a Hailong battery 48V 20 aH. Then built a frame out of electrical conduit with Makerpipe connectors. The solar panel mount is made of 1x2 wood epoxied together and lashed with string onto the metal frame. I connected the 36V 200W Allpowers flexible solar panel to an Elejoy MPPT boost charge controller, which outputs 54.2V into the battery. That is the short version.