On which side is time? AC or DC? :wink:Things Take Time.
BTW in Norway DC is growing 10-times faster then AC (by 222% year-on-year for DC vs. 19% for AC).
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On which side is time? AC or DC? :wink:Things Take Time.
On which side is time? AC or DC? :wink:
BTW in Norway DC is growing 10-times faster then AC (by 222% year-on-year for DC vs. 19% for AC).
We will see, but I have something else to think about.This year there is probably only one car model that can take advantage of the last point. Probably next year too. But if Renault isn't flat out lying when they say their cost increase for 43 kW AC is 150 euros compared to a standard 3.6 kW charger plus a DC charge port, then everyone will in time have to follow.
I usually will not. My longest trips are around 500 km, and then I will usually have a lunch/rest break of about 45 to 60 minutes. With 22 kW, that will give me about 100 km extra, which is what I need. If I was zipping along a motorway at 140 km/h, I would need more power.Lets see what may be in 5 years time, when thousand of EV-Cars like Models S are on the road. I will still charge my car at home, maybe from my solar-panels. But for long distance trip, i will see service stations for EV like those today for ICE.
I believe 98 % is more correct for a large power distribution transformer (around 500 kVA).But what happens if you want to charge 10 Models S with 43kW AC or 90kW DC. For AC-charging you need an transformer to step down down the 20kV voltage down to 230V/400V. The Transformer has losses (92-95% efficiency).
That's WAY too high. Search for "transformer price" in this link, 400 kVA is 7000 euro in 2011: Price Of A Transformer | EEPTransformer are expensive too 600KVA around 30.000-40.000 Euro.
Other scenery: on big rectifier transforms 20kV AC direct into 500V DC which are distributed to each DC charging station. No transformer losses, higher efficiency as single charger.
The conclusion, if you want to charge more cars at the same time quickly, advanced DC charger are the solution. A single CHAdeMO is a nutshell an while disappear because being to slow and to expensive to produce.
Lets see what may be in 5 years time, when thousand of EV-Cars like Models S are on the road. I will still charge my car at home, maybe from my solar-panels. But for long distance trip, i will see service stations for EV like those today for ICE. But what happens if you want to charge 10 Models S with 43kW AC or 90kW DC. For AC-charging you need an transformer to step down down the 20kV voltage down to 230V/400V. The Transformer has losses (92-95% efficiency) Transformer are expensive too 600KVA around 30.000-40.000 Euro. To this add the losses for the on-board charger. Other scenery: on big rectifier transforms 20kV AC direct into 500V DC which are distributed to each DC charging station. No transformer losses, higher efficiency as single charger. The conclusion, if you want to charge more cars at the same time quickly, advanced DC charger are the solution. A single CHAdeMO is a nutshell an while disappear because being to slow and to expensive to produce.