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> In a purely electric car world, all street parking will have charger stations like they would have analog parking meters a few decades ago. Will it? Every ci
by blincoln 5y ago
> In a purely electric car world, all street parking will have charger stations like they would have analog parking meters a few decades ago.
Will it? Every city parking spot in every city in the world potentially pulling ~220V @ ~60 amps overnight seems like an awful lot of electricity to generate, to say nothing of the expense of running all of the necessary cabling and charging stations. Are there cities actively implementing that strategy?
- kwhitefoot 5y agoWhy on earth would you need 60 A? My Model S add a kilometre for every amp-hour at 230 V. Charging from 18:00 to 06:00 adds 120 km at 10 A. Residential streets already have cables for street lighting, adding extra cable or uprating the existing cable to support charging posts can use the same cable ducts.
- dtech 5y agoObviously it's not feasible to have every parking spot pull 13KW, they would need to coordinate to manage load. The core thing is that you're assuming that every parked car arrives in the evening with near-zero charge and needs to be full in the morning. This is not the case, cars are parked 95% of the time. They can charge at work on in garages too - useful for solar power peak supply. Let's do some napkin calculations: 95% = 1 hour per day of use for 23 hours of charging. Let's assume that's 100km drive in that 1 hour, 15Kwh for a typical EV. So on average you need 15/23=0.65KW per car, not 13KW. There's 285 million cars in the US, so you'd need 4.3 billion KWh per day for full electric. Currently US generates 11 billion KWh per day [3]. [1] https://fortune.com/2016/03/13/cars-parked-95-percent-of-time/ https://fortune.com/2016/03/13/cars-parked-95-percent-of-tim... [2] https://www.eia.gov/tools/faqs/faq.php?id=97&t=3 https://www.eia.gov/tools/faqs/faq.php?id=97&t=3