On the robotic threads controlling lens for focus on sunlight,

 

good usage would be on ships. Since the sea is usually abundant

of solar energy.

 

Heat can charge the battery, and battery, to run the motors.

 

This is most likely more effective than solar panels.

 

Minus the target area must be protected from fire.

 

I don't mean many lens, but large one, enough for concentrated

light conversion to energy then to motors.

 

Clean energy, besides the sails. If it works.