Checkout this portable solar charging solution from EcoSpeed! It can plug directly into their batteries with a custom converter.
The panels are not cheap but it is exciting to think about the possibility of solar charging while out and about. It could add a new dimension to e-bike touring.
May is national bike month in the US. KTLA in Los Angeles had this video coverage of e-bikes with Ethan from the IZIP Store in Santa Monica. There is a woman in the video who sold her car and now uses an e-bike instead 🙂