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I've noticed the majority of electric / PHEVs have charging points at the front or left side of the vehicle. Given the layout of my driveway, this is really inconvenient for me. I'd ideally like the socket at the back right corner of the car.
Other then aesthetics, are there any technical reasons why manufacturers don't provide multiple sockets on the car so you can hook up at the most convenient location?
Adding another charging socket would add more weight (slightly), complexity, and cost to each car produced of that model. And given the generally cheap and plentiful availability of power extension cords I doubt it's actually a problem for many people so why go to the effort/expense of doing so?
Have you tried putting the vehicle on the driveway the other way, i.e. reversed it on or driven it on forward. This will switch effectively switch the side of the vehicle presented to the property.
I can think of two cars with multiple filler caps; the original 1960's Mini Cooper S and some of the old Jaguar XJ's. I can't think of a single car today which has more than one fuel filler point so it could be argued that this problem isn't restricted to EV's. It's easier to solve on an EV with a long charging cable. The amount of times I've seen someone pull up to a fuel pump and realise the filler cap is on the wrong side always makes me chuckle.
Of course there could be a practical reason that they don't have more than one socket. I remember seeing old photos of Minis being filled from two fuel pumps. Try this in an EV and you may potentially introduce a potential difference across the ground poles plus you may plug electicity of a differing phase into another port. If they had two ports you can guarantee that some fool would try plugging them into two electricity supplies thinking it would charge twice and fast and end up shorting something out, starting an electrical fire or even hurting themselves.
You should note that electric cars may come with an extension cord that is so long that it reaches the charging station no matter which way you park your car.
For those cars that don't come with a long extension cord (which you can purchase later with your own money), your question is similar to asking why won't car manufacturers sell their cars with a full fuel tank (you can fill it up later with your own money). Costs, you know...
In fact, I would say that conventional cars chose the same approach: why can't you fill them with fuel from either side? It's those extra costs. If the manufacturer can cut costs by allowing filling up only from one side, the manufacturer will do that.
This doesn't quite answer the question, but might be peripherally relevant...
The Mitsubishi i-MiEV had two sockets:
CHAdeMO, (fast charge), rear left side.
IEC62196 Type 1, rear right side.
Having the charging connectors on both sides can't have been intended for home charging convenience, since home CHAdeMO chargers are either nonexistent or at least very rare. Why it was that Mitsubishi put these connectors on opposite sides is another question...
The MiEV included safety circuitry to prevent both sides from charging at the same time.
