Logitech claim the keyboard will work in total darkness for up to 3 months without charging from the sun.
But doing away with the batteries is only one of its green credentials - it's also free of FVC and comes in recyclable packaging.
The keyboard comes with a solar power app that includes a Lux meter and can tell you whether the keyboard is getting enough light.
Already released for Windows, there's a Mac version coming next year. The Windows version should be in the UK shops for December.
No information on UK prices at this time - the model number (in the states anyway) is K750.
photo credit: rob enslin