If you can get a properly engineered and installed Northern Lights matching your loads with service intervals you know you(or your operator) can meet for the new boat. You should expect the Northern Lights to meet or even far exceed the published service life. Not all generators are created equal. That said nothing matters more than a proper installation of a unit that matches the actual loads and the religious execution of the required service routines. Today they are many generators that should be serviced before the end of a ten day charter and such.