From one geothermal generator it is possible to get 10,000 kW - this is a lot at the beginning, but not enough at the end. I made them on the basis of oil, but the steam turned out to be almost eternal)), I really went through the game and did not play further, I just started it, I did not have mega plants. It is still necessary to take care of the initial energy in order for the pump to pump this steam into the generator, and then the generator itself.
It’s an oil rig that pumps a resource (geothermal steam) into a generator that runs on it.