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True you don't NEED one but you'll be paying standard unit rates for power if you don't. Even now with ridiculous pricing, you can get 4.5p per Kwh overnight. That differential will be maintained for the forseeable future no matter what happens with wholesale prices, until the grid demand is...

Oh but there is. Recognising any given devices' power usage signature is fairly trivial and I can forsee a time when that information is supplied by the manufacturer. Combined with an update to smart meter software, 'they' will - in theory at least - be able to tax any given device at whatever...

Yes that is correct, and is (one of) the reason why EV chargers require an independent earth, or a PEN fault detection device that DISCONNECTS THE EARTH CONNECTION in addition to disconnecting the power. You ABSOLUTELY MUST NOT connect the charger earth rod to the installation earth. Doing so...