Hi,
I have tripped a 30 amp breaker just once. I did not have access to the shore power breaker panel. I do monitor my electrical use with a watt meter.
I tend to run my RV 100% electrically including space heating. I wish to be able to run the roof air conditioner--and can do so--but I'm not comfortable doing so with my existing MSW inverter.
In the past, I've often used double conversion to power the 30 amp RV from a 15 amp outlet. I.E. powering most of the RV from the inverter and charging by having only the converter plugged into shore power.
I now am full time and do a great deal of urbandocking. Often the maximum shore power I have access to is 15 amps, and equally often it would be either extremely inconvenient, or impossible to get to the breaker panel.
In short, I think the 3012 may be quite useful to me if it will physically fit and IF (but only if) I can limit input to as low as 15 amp easily.