I don't understand the mechanism that hexafluoroethane would be produced by a solar panel. I guess, that gas might be produced as an impurity during manufactur

I don't understand the mechanism that hexafluoroethane would be produced by a solar panel. I guess, that gas might be produced as an impurity during manufacturing, but wouldn't that be at the factory? That seems like something that would be really easy to monitor and regulate because fabs are expensive and rare. could you explain more about the hexafluoroethane?