They use a back up power supply to keep turning when there’s no wind. Sometimes it costs more than the meager amount of energy they produce.
There is nothing good about them. In fact they couldn’t even work without regular powered backup. They also have a negative health impact on people living near them, because of the constant noise and vibration, they ruin the landscape and they kill thousands of migratory birds a year.
I knew that was the case. From like June to August, there are days without much wind....nada, but those turbines are working.
I bet there is no NET power coming from those loud and unsightly things.
But the farmers get $5000 bucks a year to have them on their land.