Every day the dust settles on thousands of square kilometres of solar panels around the world, cutting the amount of electricity they produce.

A robot designed by an Israeli start-up can autonomously clean rooftop solar panels system that other cleaning robots can’t access, increasing the panels’ electricity generation by as much as 15 per cent.

Autonomous robots are widely used to clean large-scale solar arrays on the ground. Many work by sliding along rails to wipe dust, bird