Scientists in Germany have created an invisibility cloak for solar panels! Solar panels are a green way to make electricity. The cloak allows the panels to generate more electricity.
An invisibility cloak bounces light round an object so you see light from behind it instead of in seeing it. They have been made to work for very small things.
Metal strips on solar panels take the electricity away. However, they block sunlight getting to the solar panel to make the electricity in the first place. The invisibility cloak bends sunlight round the strips so it all gets to the solar panel and less energy is wasted.