Why is it that people always compare the costs of charging at motorway services to filling up a diesel at bargain basement supermarket forecourts?
Charging at home costs me 7.5p/kWh, which works out to around 2p/mile. Even with the most efficient diesels being fuelled up at supermarket forecourts, you’re looking at around no less than 10p/mile.
This doesn’t detract from the fact many rapid chargers are ludicrously expensive at around 80p/kWh. Fortunately, the Tesla superchargers average around 36p/kWh, which is far more palatable.
As to how can it be that a particular trip may be more expensive in a diesel as compared to an EV? That may have something to do with all the subsidies the fossil fuel companies receive, whilst public charging receives no equivalent subsidies and has a 20% VAT rate attached to it.