Another thing I like is that the recharging stations can have their costs amortized across potentially dozens of buses per route. That should help ROI.

Assuming viable economics & 100% xfer, "The system enables onboard batteries to be charged in 15 seconds with a 400 kW boost" would be 1.67 kWh and how many bus mile(s)?

Sorta negates battery switching.

Soon we can connect capacitors to lightening rods - and get more than a fire.

This may come as a shock to many posters but this is just the beginning of future 200 KW and 400+ KW charging units.

Feeding one or two dozen of those co-located chargers may need a 10,000 KW sub-station but that will not be a real challenge. That's is what each large condo building in our area is already equipped with.

There's lots of room on the roof of a bus for the equipment needed for this kind of charging. A car OTOH, not so much.

DaveD,

Charging a few buses is much different than charging thousands of cars at 100 kW+ levels. There are 5000 VAC services that go through transformers to power housing and business complexes. That does not mean we want to double the city power consumption, nor that we could.

The discussion had to do with MANY cars quick charging continuously all day while business and home air conditioners demand even more electricity M-F 9-5 every day.

EPRI has said we can handle people charging slowly over 5-6 hours each night. They did NOT say we could handle quick charging 10 million cars during the day.

EPRI is a source authority in the U.S. for the power grid. They say we can charge a million cars at night, so "let's not forget" was never forgotten.

The EPRI did NOT say we can quick charge a million cars M-F 9am to 5 pm across the U.S. If you have any information that shows they said we can I would like to see that.

"Producing e-energy for 10 M units progressively increasing to 200+ M units over a 20 year time frame IS NOT a real challenge."

I see NO substantiation for that claim.

Average EVs will only consume 8 to 10 kWh/day. Most homes can save that much with high efficiency variable speed Heat Pumps, 200+lm/Watt LED lights, improved appliances, improved wall-ceiling insulation, better windows and doors etc.

Secondly, most overnight charging (up to 80% of total) will be done with excess night time electricity. Increased night time loads will increase suppliers profits and should reduce e-energy price?

SJC,

Yes, but most EVs don't need to be rapid charged. What percentage of cars actually do long distance driving in a day?
It will be many years before we even have 10 million EVs on the road. And it will be decades before we have 10 million of them doing long trips in a single day.

I'm looking for a rapid charging station able to charge 6-8 cars at a time, and that would take about as much power as running an average Walmart. If you look at Tesla's announcement, they're planning it out well. For example, in the Southeast, a lot of people travel from Atlanta down to the Florida pan handle. They've got a super charger lined up for Montgomery, that would allow you to start in Atlanta with a full charge and stop once in Montgomery and then make it all the way to Panama City or Destin on the Florida Coast. I have a house down there and so does my brother and many of my friends and family.
People in this area who can afford "summer homes" often buy something down in that area. Those are also the people who can afford a Model S. Seems like a good match to me.

They are also planning one in Macon, Ga. which would allow you to start in Atlanta and make it all the way to to their Lake City charger at the junction of I-75 and I-10. From there you could make it to Tampa, or Jacksonville or Orlando.

Many electricity sources are not 'non-renewable ' Coal, Oil' or 'NG'. Major electricity sources like Hydro, Wind, Solar, Waves, Geothermal etc are easy pick and will be around for as long as we are. à

Combined Hydro-Wind-Solar can produce all the clean energy required for 20+ people for a few more billion years.

If we don't want to exploit those energy sources, we could hire people from A.... to do it for us?

Any new nuclear plants, were we to build any, would require some new transmission.

Rooftop solar requires no new transmission.

Wind requires some new transmission, but even with the cost of transmission added in wind is still less expensive than new nuclear.
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A study by the Pacific Northwest National Laboratory current off-peak capacity and transmission infrastructure could charge 75% of the US car and light truck fleet were they all electric.

There may be some need to upsize neighborhood transformers if several EVs start charging at night. Presently transformers are sized based on the expectation that they will be allowed to cool down at night.

We'll likely bring new wind on line much faster than EVs start using off-peak electricity.

If someone wants to install a large quick charge station, they need approval, they will not be allowed to brown out the whole grid. It is good to project how much home charging at night versus quick charging during the day and how many EVs will be out there.

At the present time, it looks like we will not have millions of EVs out there any time soon. I advocate that we look at it as a total systems approach rather than say we will all be driving EVs real soon, so "oh happy day".

Mainland USA is only about 2000 miles by 2000 miles (at best) It would take only (20 x 20 = 400) quick charge stations, installed at major road intersections or every 100 miles or so for basic nationwide coverage.

First generation stations could be equipped with 5,000 KW grid connection, good enough for 12+ simultaneous 400 KW chargers.

The basic first generation charging network would use 5,000 x 400 = 2,000,000 KW. MAX. In practice it would be less than 50% of the MAX.

That may look like a lot of e-energy, but it is not.

A single existing large Hydro plant (4,200,000+ KW) could supply about 2X to 4x as much and meet requirements for second and third generations charging networks.