Renault's factory humanoids overheat after two to three hours. A shift runs eight.
Renault Group and Wandercraft presented their Calvin programme at the Humanoid Robots Summit in Stuttgart on Wednesday, Humanoid Guide reported. Their slides put 350 robots into Renault plants before the end of 2027.
The same slides said motors overheat after two to three hours of heavy lifting, and that neither active cooling nor the ice packs Chinese teams use are ready for production. They put teaching a humanoid one industrial operation at six months.
Siemens told the summit that most prototypes run two to four hours against an industrial requirement of eight-to-twelve-hour shifts. It puts 95% uptime as the threshold for a two-to-three-year payback.
Renault Group says Calvin handles tyres at its Douai plant and lifts 40 to 50 kg, and that around ten will be in place by the end of 2026.
That is an endurance limit, and a shift plan has to name what covers the gap while the motors cool.
🎥 Video: Groupe Renault, official YouTube channel, 11 Jun 2026. News: Humanoid Guide, 9 Sep 2026. Links in the first comment.
What covers your station while a robot cools down?
What the captions say
- A humanoid robot walks the floor of a car plant.
- This is Calvin, built by Renault and Wandercraft.
- It works at Renault's Douai plant in France.
- It lifts tyres of 40 to 50 kilos.
- Renault plans 350 of them by end 2027.
- Motors overheat after two to three hours of lifting.
- Siemens puts an industrial shift at eight to twelve hours.
- So the shift plan has to carry a cooldown.
