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How Much Does It Cost to Charge an Electric Vehicle? (A comparison at home and on the road, with gasoline)
(www.caranddriver.com)
This is a most excellent place for technology news and articles.
As its street furniture it will, like the approval to hook up a charger to the grid, which all fixed (home) chargers need in the UK, it should be handled by the installer for you. As there are as many NIMBY councils you have a non zero chance of it being approved or not approved, there are councils will reject solar panel installs for example.