On Aug 20, 2011, at 2:38 PM, Herbert Graf wrote:

>> The "battery station" needs to be able to restock with charged
>> batteries in a timeframe comparable to having underground tanks =20
>> filled
>> from a tanker truck.
>
> No, it doesn't. The station would only need to take delivery of an
> initial batch of batteries. After that, it's just a matter of having
> enough batteries on chargers ready for when people need them.

"Restocked" as I used it meant "or recharged."  You don't get very far =20
if you can swap a battery in 10 minutes if it takes 8 hours before you =20
can charge that and put it in the next car.  Unless you have hundreds =20
of batteries, and customer traffic slows down.  (Hmm.  it makes me =20
realize that I have very little feel for how many tanks full of gas a =20
typical gas station pumps per time period.  The Costco near me has I =20
think 16 pumps, all of which are in use every time I go by.  That's =20
something like 500 cars per day assuming an 8-hour day, and you can't =20
get around needing to charge 500 batteries every 24 hours...

BillW

--=20
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