"You don't understand", isn't an argument for your point. Its false, but more importantly, its irrelevant. If its true, it still doesn't show that you are right or that I am wrong.
On this particular issue knowledge of how the system works isn't all that important, except the broadest most simple types of knowledge. The fact that such systems tend to produce fairly little electricity, except for very expensive versions of the system, is the main thing you need to know. You also need to have some idea of the capacity of the electric car that's being recharged. (If I was wrong that last point would be the most likely reason for being wrong, but its appears I was not wrong, see below.)
"A full recharge of the battery system requires 3½ hours using the High Power Connector which supplies 70 amp, 240 volt electricity"
en.wikipedia.org
Which means you need aprox. 58,800 w/hours or 59 kw/h to recharge the car.
"Solar electricity costs about $10 to $12 a watt installed"
thesolarguide.com
Lets take the lower end of that figure. $10/watt. So for 2kw it would cost about $20k (including installation). You might argue that the cost is a bit lower, but even if it is a typical home solar cell system probably won't have much more than that.. So lets go with a 2 kilowatt system. If your using 1 of those kilo watts to run your house, that leaves the other for charging the Tesla. So it would take you 59 hours to charge it from an empty battery state. And that's 59 hours of sunshine, which might be 5 days. Often power will be restored by then. Yes it would take less time, if you where not starting from empty, but if a gasoline powered car isn't starting from empty, you just drive it for a few days, or drive it out of the area to where you can get more gas. If your assuming "not empty" for the electric car, then you reasonably have to do the same for the gasoline powered car.
Of course maybe its more than a 2kw system, and/or you can by with much less than 1kw for a few days. That would speed things up. But it will still take a long time.
And yes you don't have to wait for a full charge, but the same applies with gasoline powered cars, you don't need a full tank, just a couple of gallons might last you for a few days and/or get you to somewhere else where you can get gas. |
