There's a lot of dodgy info being put out about EV's and their charging needs...
Most countries won't need to expand their existing grid capacity at all, as EV's will mostly be charged at night (either with onstreet EV parking, or off street parking) when existing demand is low (the average driver will only need 10kwh to 15kwh of total electricity usage- which is about the same as a larger 'family' sized storage hot water service) and even the smaller 4-7kw chargers can easily 'fill the tank' in only a few hours or less (those with an existing 3 phase supply already installed, or those getting one put in can have up to a 22kw charger installed- which can literally refill the average motorists daily drive usage in under ten minutes!!! )
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There are already many 'street chargers' in many metro areas already (although those without an EV may not even recognise some of them unless there is an EV plugged in lol- look for those black covers on the lightpoles in some places- thats an EV charger...)
What most 'expect' an EV charger to look like on the left- what it can look like on the right...
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A very 'discreet' EV charger indeed- just a parking bollard right??? um...... plug in your car, and connect via your phone app...
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Most EVs have a range in excess of 400km, and can do a 20% to 80% 'refill' in half an hour or less (on long distance trips, do the 100% at home, and then top up at 20% to 80% again- rather than going to 100%- that last 20% takes as long to do as the previous 60% does!!!- most current EV's will do that 20-80 charge in less than 30 minutes, some in under 15 minutes... most add 10km per minute or more 'top up' in that 20-80% band...)
Only the very oldest of houses will need any kind of 'supply upgrade'- if your house can support an electric stove/oven or electric hot water system, it can support an EV charger without needing any upgrades to the street supply!!! (a 7kw takes a 32A breaker, same as is fitted to a standard ring circuit in the UK, but on its own spur circuit...)
Most EV chargers these days have 'whole house monitoring' of the power usage (via current clamp metering), and are 'smart' chargers that monitor the household electricity usage, and are capable of 'throttling down' when the houses electricity consumption rises to the preset 'household maximum'- ie if you decide to have a midnight hot spa bath and turn on the hot tub, it detects that the power usage has risen, and will 'turn down' the cars charge rate' if it is nearing the houses maximum preset limit (this is programmable during setup, as different age houses have different maximum street supply limits- 60A, 80A, 100A, 120A, 150A and even 200A are all found, as well as those with 3 phase supplies
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The EV clamp sensor is the black thing with the grey cord, connecting to the Harvi monitor which communicates to the charger via wifi, the other one with the black/white leads is a whole house meter- they literally come in two halves, clip over the power cable, and the charger knows its own consumption, and with the data from the Harvi in this case, also knows the 'whole house consumption- should it get up to whatever its max is set to during installation, the charger will reduce the cars charging current down to keep it under the maximum it was set to...
Not that you need a 'fast charger' at your house, for most drivers it is a 'plug in and let it charge overnight while they sleep'... it is rare indeed they actually need a 'fast charger'