Ive been reading Home Power lately and there are quite a few people successfully living off grid with solar/wind -
including one couple since the late 70s with no backup diesel generator.
(they use wood for heating, but solar for all their electric and theyve never had a power outage - in fact the batteries never discharged below 75%.
its not a future technology its here now.
One guy added solar panels to a $1900 electric scooter and commutes the 5miles to work - unfolds the panels and re-charges the scooter for the way back..