I've seen some wildly varying numbers here and there, but would like to find info on how long various grades of generator will last (actual usable lifetime). I've heard a generator like Generac, or other store bought "emergency backup" models have roughly a total life of 2000 hrs, including backup models. I called and talked to the manufacture of my 10kw (20kw surge) Porter Cable (Honda 20hp engine) and was told a total life of 1500-2000 hrs, so that was consistent. Anyone know how long a "Prime Power" generator would last? I found a 15kw military (trailered) generator for sale locally for $3K, just trying to get an idea of how long they will go. These generators allow for much more service, so I'm assuming they would last substantially longer. Any ideas on useful life?