I just wonder who would use the chargers in supermarkets as it’s not like service station on motorways where your likely to be travelling long distance and the next service station is 20, 30, 40 miles up the road.
With most supermarkets being in more or less built up areas to serve a local community most shoppers would have only travelled a few miles anyway and well within the range of even a basic battery powered cars range including the return journey.