The first ever created and commercialized solar powered keyboard is the Logitech K750. Manufactured using fully recyclable plastic material, Logitech K750 has a set of solar panels at the top edge and has luxmeter that will inform user about the charging status.
Surprisingly, Logitech K750 not only charges under direct sun light, but you could even charges the K750 under a standard light bulb! Do you wish to exchange your Logitech Cordless Wave with Logitech K750? I bet Logitech won’t allow such barter to take place. 😉