Comment by nasmorn
7 hours ago
I thought this but after 3 years I can say it is unfounded. the only reason I ever think about my state of charge on the city is when I need it to be low so I can use street parking that requires me to charge.
7 hours ago
I thought this but after 3 years I can say it is unfounded. the only reason I ever think about my state of charge on the city is when I need it to be low so I can use street parking that requires me to charge.
We really need more slow charging stations for folks to just park at. I’d have assumed that the economics would have been favorable to charge by the day/night rather than by the minute.
Every street lamp has 15a of power already running to it. It would be trivial to add an outlet to each one.
There’s a genuine technical issue: the AC EVSE protocols (J1772, NACS, etc) have several safety features that are far in excess of anything you’ll find in a regular 15A NEMA receptacle. I don’t think it would be wise to gave high traffic NEMA receptacles on fully weather-exposed streetlights.
The hardware for the safety systems would not be expensive in volume, but the cable and connector are expensive and bulky. And none of the EVSE standards are specified in a variant where the receptacle is fixed and the car carries the cable.
This is solvable, obviously. I don’t know whether drivers would want to deal with having their own cables, though.
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And how many amps does the street light draw? And how many are on the same circuit? How much extra capacity is there on that circuit to charge a car? I'd bet it's close to zero.
Probably not. Often that 15a is shared with several others nearby. In many cases there is a light sensor on one light that controls them all. Sometimes the transformers that supplies them isn't big enough for more load.
Of course easy city and decade did something different so there is no universal. However issues like the above will mean it isn't easy. You need to examine each street on a case by cases bases and that makes it hard even though the work for any individual street isn't hard. Where it works great, but it isn't easy anymore.
That said, for all new lights they should all have a charger built in. The cost is small and quantity will bring it down even more.
There is not enough street lamps to charge a meaningful fraction of cars. I mean, look at the streets, there is so, so many cars, parked everywhere they can fit.
But I agree in principle - the power wiring is there already, it's a matter of spamming cheap low-power outlets wherever cars tend to congregate for a rest.
Which (obviously) already exists (google it). I haven't ever seen one in actual use however.
They should develop an easy to install add-on for streetlamps that adds two charging ports and a payment terminal.
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