3 ms·
That's a smart solution, but it doesn't solve the whole problem. Since I became aware of lamppost charging I've been counting the lamppost to car ratio. It's g
by leoedin 7y ago
That's a smart solution, but it doesn't solve the whole problem.
Since I became aware of lamppost charging I've been counting the lamppost to car ratio. It's generally somewhere around 7-10:1. Even if you convert every lamppost you're still only 15% of the way there.
There's also the power distribution problem. To charge a lot of cars takes a lot of power. A typical residential house uses 4760kWh/year in the UK - that's about 500W average. It's maybe 3x as much in the US - call it 2kW. The most basic, 13A electric car charger will draw maybe 3.1kW. A more reasonable electric car charger might draw 7kW. A supercharger is somewhere between 50 and 150kW. at the very least, you're doubling the amount of power you need to distribute to residential streets, at worse you're increasing it by a factor of 75.
Total UK electricity production is around 300TWh/year. We consume 46 billion litres of transport fuel a year - that's around 51GW, or 447TWh/year. Even accounting for the improved efficiency of electric cars, you're still looking at doubling the electricity production, and distributing that to 30 million cars, each of which is down a very long wire.
I'm all for electric cars, but there's some serious infrastructure issues we have to deal with before they're physically able to be ubiquitous.
- mceachen 7y agoIf you own the lamppost, perhaps you could own orchestration of power delivery as well? If load exceeds tolerances, the EV plugs apply a "rolling blackout" that oscillates through the network every N minutes, to give every car at least some juice? Also, typical EV eMPG is double an ICE. LEAFs are 124/90 eMPG City/Highway, for example. That makes your math for doubling electrical production a bit less scary. The fact that EV charging is commonly off peak also makes it more convenient for the grid.