My 92 left me stranded on the road a couple of times because I couldn't plug it in at a motel. My 04 never needed to be plugged in. At work we plug the Internationals in (MaxxForce junk) 24/7 and only unplug them when we are ready to drive them.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
My 04 never needed to be plugged in. At work we plug the Internationals in (MaxxForce junk) 
24/7 and only unplug them when we are ready to drive them.