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Comment Charging is a serious issue. (Score 2) 119

One other side of the fast charge issue is the power requirement required to do so. A "five minute charge" will require a very high peak power demand and that is extremely expensive to deliver as most power companies charge based on peak demand. There will need to be some sort of battery buffering or the like to provide sufficient power at a reasonable cost...

Comment DC conversion efficiency (Score 3, Interesting) 466

The problem with Rob's assessment is that his efficiency numbers, expect for power transmission, are way off the mark. It is MUCH better than he purports! DC to AC conversion is roughly 90% or more efficient these days so you are not saving much by using DC at home rather than AC. It is simply not worth it to limit yourself so much by having only DC appliances.

Comment L.A. and Waze (Score 2) 86

If the data is as good as it is for accidents, it will be all but worthless... We use Waze in Los Angeles and it will frequently just show "accident" with no indication of exactly where it is, what side of the freeway, and what kind of accident... And more often than not, when you actually get in the area, the data is stale and the accident is long gone but still showing...

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