Steve, just like Thasan already explained you: we are simply NOT there yet. Technology is not there. Some folks believe they can use Solar energy on their homes and charge those cars: it's foolish, expensive and time consuming. People talk about things they know nothing about. At best a solar panel will only produce like 250Wh. These cars have batteries rated at 90kWh+! (do the math: you will need 4 panels per kW or 180panels to charge the behemoth in one hour, or 360 panels to charge it in 30mins. you will also need a roof with an area of more than 600 sq. meters!!!)The sun shines according to where you are for like I don't know, 5hrs. How do you expect to charge your car at night???? Steve, the car giants are not naïve. I believe the answer will come in some sort of hydrogen fuel cell technology that is clean and will replace oil. On the other hand one can make a small and light (very light) electric car that will move in the cities and charge in your garage. This is possible. But a large sedan that is heavy and needs 500bhp this is a mistake. I predict decent solutions will once again come from VW/Mercedes/BMW/Audi. These companies have the cash and the will to make this happen.
This isn't how solar is supposed to work. The point is to reduce your electricity bill to zero, not use solar for a full day's use. Of course, you have to use the grid in the evening to charge your EV but the solar generation during the day makes enough to cover the difference.
Most utilities have a time-of-use plan which charges more during the day and less at night. This works in your favor and it allows an arbitrage of electricity used during a full day.
Tesla recently announced the PowerWall to augment solar which allows even more savings because you can charge the battery at night on the low rates and discharge it during the day. Or even capture the excess solar energy during the day and discharge at night.
http://www.scientificamerican.com/a...lar-batteries-for-homes-and-small-businesses/
The whole point is to move electricity generation from a centralized utility to one that is distributed in every home.
My electricity bill is zero every month and I have two EVs.
As far as BMW and Mercedes are concerned, the biggest issue they're going to have is their dealer network. Most dealers make 70% of their profit in the service centers and EVs require very little maintenance. This is going to upset their dealers and they will resist pushing EVs over ICE cars which are their bread and butter.
Maybe this is why they've been focused on hybrids instead of full EVs.
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