CNN exclusive: A solar panel in space is collecting energy that could one day be beamed to anywhere on Earth

An artist's concept of a space-based solar power system beaming to military and remote installations.

(CNN)Scientists working for the Pentagon have successfully tested a solar panel the size of a pizza box in space, designed as a prototype for a future system to send electricity from space back to any point on Earth.

The panel -- known as a Photovoltaic Radiofrequency Antenna Module (PRAM) -- was first launched in May 2020, attached to the Pentagon's X-37B unmanned drone, to harness light from the sun to convert to electricity. The drone is looping Earth every 90 minutes.