I saw a prius online that had solar panels to recharge the plug in battery pack. The cells were set flush and curved to the roof so it wouldn't affect aerodynamics.
Think about this...plug in hybrids with solar panels on the roof...so they recharge them selves entierly as you drive. Then when you get home or to work, or the mall...etc you plug them in to power cords in the parking lot and they put power into the grid!
yeah it wouldn't be much...but look at how many cars are in the lot at your local mall. That would add up.
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