My daughter, son-in-law and three kids have an Prius hybrid for about 10 years. Wonderful vehicle. They still have it and have no intention of trading it in yet.
Great in town vehicle, good long distance vehicle.
The gasoline engine charges the battery. It does not plug into the electric grid.
Diesel electric hybrids have been the most efficient prime mover for very large vehicles (train engines and large mining equipment trucks) for a very long time.
How often do they have to refill the gas tank so it can charge the battery to run the electric motor?