Logitech came out with a solar-powered keyboard awhile back, the K750. Now, there's an update with the K760 that many Apple product users will appreciate.
The new keyboard allows you to easily switch between three different devices, so you only need one keyboard for your Mac, iPad and iPhone. The keyboard features three keys, each assigned to a different device. Switching devices is as simple as just hitting a single key. This makes it perfect for not only having minimal accessories for your devices at home, but also minimizing what you need to take with you when you're traveling. This keyboard makes it so easy to switch among devices that there's no excuse for having multiple keyboards to make it quick to work on different products.
And as always, the keyboard can be charged both with sunlight and indoor light, and will work for as long as three months on a single charge.
The Logitech Wireless Solar Keyboard K760 will be available sometime in June for about $80.