Even tho they are called Onan 5.5s, there must be some difference in them because I've heard of 1 - 30 amp and 1 - 20 amp breaker, now 1 - 30 and 1 - 15 amp breakers, yet ours (Factory Installed) has 2 - 30 amp breakers.
Wonder why the different combo breakers.

Is yours the 5.5 or 6.5? Mine is a 6.5 and I thought the guy said that was the big difference between the 2? Although I may be wrong?

Could be the dishwasher issue running with the Onan is that they are not generating a pure sine wave power output. Modified Sine Wave power generation from generators or inverters can cause issues with some electronics.

Joe, it's marked as 5.5K. Now I suppose it could have the wrong markings somewhere, like maybe the wrong face plate where the breakers are. Have to look closer and see if there's marking on the breakers them selves.

Joe, it's marked as 5.5K. Now I suppose it could have the wrong markings somewhere, like maybe the wrong face plate where the breakers are. Have to look closer and see if there's marking on the breakers them selves.

I think It was Brad who told me to make sure that whichever one I decide on, that it had the 2 30amp breakers.. The Onan guy agreed.. Looking at the sheet posted, It looks like that they offer the 2 options on BOTH the 5.5 and the 6.5...

On a side note,

My dishwasher does not work on th generator either... It just blinks and beeps.. It took me a while to find out where the beeping Was coming from the first time

Pretty sure that not pure sine doesn't help, but I believe someone had this issue a year or 2 ago and discovered that it was more of an issue that due to the load on the generator, the speed wasn't correct to generate a 60 hz cycle. It was higher or lower and that was causing the dishwasher to not run. Once they tweaked the rpm while checking the hz output the dishwasher would run fine. Not 100% sure but I think they were using a Killawatt type meter and using the instructions from the Onan manual were able to adjust the rpms to make it work.

Chris & Maria
2012 36RL

From Chris's spec sheet, My 2003 Onan 5500LP was the type that had a 30A and a 20A. When Michelle said hers was 30A/30A a few years ago I tried to figure out the difference and not sure I fully understood, but the 30A/20A HACR rated generators (HACR=Heating, Air Conditioning and Refrigeration) are specified for motor starting applications where there is a spike.

Best I can figure is they just degrade the rating to increase the spike capacity, but that 20A breaker haunted me sometimes, as each time I installed the gen in a new 5th wheel I had to go into the breaker panel and relocate breakers to balance the load heavier on my 30A side to keep it from tripping the 20A side.