Years ago when I worked for the railroad and they still ran cabooses; all of ours were equipped with Onan generators. Well I have to say these genney's were tough. Very few breakdowns. The biggest problem we had with them (and that was fairly infrequent) was the "charging diode" for the battery charging circuit. These units were subjected to the worst of conditions and just seemed to keep on running for years.
Although these units are probably not the same as "resi" units there quality was impressive.
