running several transformators in parallel will cause them to stack each others output
example when the source gives 100mw and you run one transformator you'll get around 96MW which is correct.
But when you add another transformator, the max output will increase by its concurrent max rating... meaning 3 transformators will give 300MW, 10 will give 1GW, despite the powerplant or the source itself only being able to produce 100MW.