Re: 5 minute recharge time
"Because it's effectively subsidised by not having duty charged. Expect that to change as the number of users increases."
Even if fuel were not taxed, electric cars would still be cheaper to drive. Electricity already has VAT paid on it. It's also impossible to charge duty on electricity used to drive a car without charging duty on other electricity. Electricity is electricity. I expect if governments wanted to tax electric cars they would do it through licensing....
...BUT I think that targeting electric cars would cause quite an outrage. Currently they have at least the fig leaf that taxing fuel and higher-power cars is good for the environment. What might happen is an across-the-board increase in car licensing to make up for lost fuel duty revenue.