Perhaps you means 24kWh? That's the amount of energy in the battery of a Leaf.
From http://en.wikipedia.org/wiki/Photovo...ion_and_energy we can see that the total ammount of solar energy in 1sqM in a day is about 4 - 6 kWh. Combine that with thefficiency of available solar panels ( http://en.wikipedia.org/wiki/Photovo...ule_efficiency ) and you get about 1kWh / sqM / day
You could fit perhaps 3sqM of solar arrays on the top of a LEAF. So 3kWh / day
At which rate it would take more than a week to charge a LEAF - or in one day you would generate enough power to travel about 8-10 miles. Less than a third the average distance driven by a LEAF owner per day.