Each robot can adjust 200 solar panel arrays in 40 minutes and consumes about 30 cents of electricity a day, according to Bokhari.

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The panel on the climbing robot, about the size of a coffee tray, harvested enough power to run a small lawnmower.

ECONOMIST: Monitor

By eliminating individual trackers and letting one battery-powered robot do the job for 200 panel arrays, QBotix claims it can cut costs by 15% while increasing electricity generation by 15%.

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Behind a high fence in Menlo Park, Calif. a gray, tuna-shaped robot glides on a monorail around 20 solar panel arrays attached to steel poles, like WALL-E on a Disneyland ride.

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Behind a high fence a robot glides on a monorail around 20 solar panel arrays attached to steel poles, like WALL-E on a Disneyland ride. (See video below.) The robot, made by Menlo Park, Calif.

FORBES: Can Solar Robots Cut The Cost of Renewable Energy?

If the Quest is to come with a panoramic skylight, the robot also knows to pick up the steel roof panel with large rectangular holes in it.

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Behind a tinted glass panel 18-carat gold powder, laid down by a robot arm, sparkles as a laser fuses the metal into complex three-dimensional shapes, layer by layer.

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