James:
Just me, but I’d call and ask. It sure looks like a generator that runs in the 3600 RPM [1] region. Some use a slightly higher or lower RPM than 3600 but they’re all the same class of service. Northern has a habit of calling non-continuous duty generators a “professional model”, which means absolutely nothing. I’d look around for an electric start 1800 RPM RV [1] version. Also very quiet (to meet the National Park Service regulations), rated for continuous duty and, courtesy of the site, can be fitted for switchable propane or gas. A new 4.5 KW [1] model runs ~$2200 and go for around a grand in used condition.Just my 2 cents worth ….. or is that already my .02 Euro worth? I dis-remember.;-)
Regards, – The Army Aviator