It isnt when you look at Q total. Total energy input for all needed support systems versus energy produced. See https://en.wikipedia.org/wiki/Fusion_energy_gain

It isnt when you look at Q total. Total energy input for all needed support systems versus energy produced. See https://en.wikipedia.org/wiki/Fusion_energy_gain_factor https://en.wikipedia.org/wiki/Fusion_energy_gain_factor for more details