[The Cajun]

You are going to find out the same thing I found out in college. Using wind and/or solar to charge batteries(especially lead acid batteries) is an utter waste of time.

Bingo!

The concept will never go anywhere until batteries are a thousand times more efficient

There are a couple of possible ways to do that (carbon nano tubes for one), but the the danger of a cascade type of failure and catastrophic instant energy release would be very bad to say the least.

[mamelukesabre]

Theres a danger of catastrophic energy release with gasoline and we all seem to manage.