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Maybe I'm engaging in magical thinking, but I can't help think after a policy like this is implemented, apartments without electrical service next to your parki

by ip26 6y ago

Maybe I'm engaging in magical thinking, but I can't help think after a policy like this is implemented, apartments without electrical service next to your parking spot will rapidly become virtually unlettable. Supply follows demand.

xxpor 6y ago
And following that assumption, the most recent version of the national electric code in the US calls for there to be a drop for a EVSE at every N parking spots in new apartment buildings (there's a formula based on how many spots). It doesn't require for an EVSE to actually be installed, but the building has to have the capacity for it. That's important because adding say 20 30 amp EVSEs is a non-trivial increase in the total capacity a building needs. BTW, even a 30 amp EVSE isn't great in an apartment. Because commercial service is almost always 3 phase, you'll only get 208v. That's 6.2 kW. In my townhouse, I have a 40A 240V circuit (50A at the breaker, but the 80% rule means the EVSE only puts out 40A). That's 10 kW. A 61% increase.
- eisa01 6y ago
  Norwegian experience is that you only need on average 1-2 kW on a load balanced system (individual chargers are 22 kW). I hope the regulation allows for that?
pmontra 6y ago
Houses could have their own charging stations. I guess all the cars will need to be charged during the night, in parallel. Parking garages could add charging stations for all their customers and get paid for that. Parking places on the streets could be equipped with charging stations, one per place. It's going to be more complicated than laying fiber optics but doable. It's a new grid as big as the current one and for higher wattage. Finally, if you have to park where there are no charging stations, oops. Gas stations that can refill N cars per hour will be able to recharge a fraction of them, bad news for those businesses. Of course this is true only if we'll have to charge. If battery swap becomes common then the problem will be solved. Yet, the volume and the weight of a battery is still greater than the volume and weight of the gasoline storing the equivalent energy. The logistics will be more complicated. I expect to see power plants dedicated to charging: charge batteries -> load them on a truck -> deliver to "EV stations" -> bring back the exhausted batteries -> check if they're still OK -> loop again.

by ip26 6y ago

xxpor 6y ago

And following that assumption, the most recent version of the national electric code in the US calls for there to be a drop for a EVSE at every N parking spots in new apartment buildings (there's a formula based on how many spots). It doesn't require for an EVSE to actually be installed, but the building has to have the capacity for it. That's important because adding say 20 30 amp EVSEs is a non-trivial increase in the total capacity a building needs. BTW, even a 30 amp EVSE isn't great in an apartment. Because commercial service is almost always 3 phase, you'll only get 208v. That's 6.2 kW. In my townhouse, I have a 40A 240V circuit (50A at the breaker, but the 80% rule means the EVSE only puts out 40A). That's 10 kW. A 61% increase.

eisa01 6y ago
Norwegian experience is that you only need on average 1-2 kW on a load balanced system (individual chargers are 22 kW). I hope the regulation allows for that?

pmontra 6y ago

Houses could have their own charging stations. I guess all the cars will need to be charged during the night, in parallel. Parking garages could add charging stations for all their customers and get paid for that. Parking places on the streets could be equipped with charging stations, one per place. It's going to be more complicated than laying fiber optics but doable. It's a new grid as big as the current one and for higher wattage. Finally, if you have to park where there are no charging stations, oops. Gas stations that can refill N cars per hour will be able to recharge a fraction of them, bad news for those businesses. Of course this is true only if we'll have to charge. If battery swap becomes common then the problem will be solved. Yet, the volume and the weight of a battery is still greater than the volume and weight of the gasoline storing the equivalent energy. The logistics will be more complicated. I expect to see power plants dedicated to charging: charge batteries -> load them on a truck -> deliver to "EV stations" -> bring back the exhausted batteries -> check if they're still OK -> loop again.