Stellarators currently do not output more energy than they input. As of today, no stellarator in the world has achieved a net energy gain (often called a Q-factor greater than 1).
While they are highly efficient at holding onto plasma, they are still strictly experimental machines that consume more electricity to run than the fusion reactions produce.

No, the Wendelstein 7-X stellarator in Greifswald, Germany, did not produce more energy than it consumed.
Current Status and Purpose

Experimental Device: The Wendelstein 7-X is a purely experimental fusion device built by the Max Planck Institute for Plasma Physics.
No Electricity Generation: It is not designed to generate electricity or achieve a net energy gain (fusion breakeven).
Main Goal: Its purpose is to test and prove the physics and continuous-operation capabilities of the stellarator design for a future commercial power plant.

Performance Milestones

Energy Turnover: During experiments, the reactor achieved an energy turnover (injected heating power multiplied by duration) of up to 1.8 gigajoules over several minutes, but this represents energy put into the plasma via heating systems, not net energy produced by fusion.

Plasma Records: It has set records for sustaining high-temperature plasma for long durations (such as 8-minute and 6-minute pulses), reaching ion temperatures of 40 million degrees Celsius.