Short answer, no, not really.Just wondering if it is hard on the alternator constantly charging like that?
Long answer: In the old days when cars had generators instead of alternators, generator brushes carried all the current that the generator was putting out. This caused wear on the brushes and the commutator proportional to the amount of current generated. So back then, yes, more wear with more current.
The brushes in an alternator don't carry the current that is produced. They carry a very small current that controls the amount of current that the alternator produces. Alternator brushes almost never wear out. There are electronics involved in an alternator, some of which convert the AC produced into DC that the car can use. But electronics are electronics, you get failures here and there, but in my opinion, normal operation won't hasten their demise. Now if you're pulling 200 amps continuously with a winch or something, things are going to start heating up, but not from just maintaining 14 volts on a battery.