A PHEV can be treated like a hybrid – just don’t ever plug it in. It will still charge the battery while you are driving. If you can find a way to plug it in though, even with a granny cable, it will cut your fuel bill.
With respect (and I speak as someone who has a PHEV), that is poor advice. PHEVs only make sense if you charge at home after every time that you use them, and if the majority of your journeys are within the EV only range of the car. PHEVs are heavy cars with generally modest petrol engines. If you are lugging around a heavy car with a depleted battery, fuel economy isn’t brilliant and when the petrol engine is also being used to recharge the battery as well as propelling the car, fuel economy can be very poor. If people want a hybrid but don’t want to charge at home, it is far more sensible to get a self charging hybrid, which is lighter than a PHEV.
