According to Macfixit, the issue appears to be excessive power draw, as units can be charged from the inverters while powered off, but have issues about charging when tured on.
A MacBook Pro draws a staggering 85W of power, while most airline power inverters supply 75W or less.
Macfixit says that the way to fix most of the problems is to remove the battery from the MacBook Pro while it is connected to a low-power source.
Another clever idea is to use the MacBook power adapter which draws only 65W of power. It works with the MacBook Pro but will not let you charge the battery and use the lappie at the same time.
Odd that the design geniuses at Apple didn't seem to think this one through. µ
L'INQ
www.macfixit.com