Those breakers can be darn frustrating. plus they sometimes trip to off for no reason at all EVEN IF THE GENERATOR IS OFF.. Yup. pot holes, speed bumps. No reason at all. THey just felt like it.... NOTE
on mine seeing the ON'OFF marking requires sun at just the right angle or a flashlight.. So I cheated.. I got out my brother P-Touch and noticing a nice flat area on the OFF side.. Made a label A Bit easy to see in the dark with your eyes closed label (Seriously you can feel the difference between the P-Touch tape and the material behind it so you can tell which side it's on with your eyes closed) THe Left side in my case.
Has been a real help.
True story (This you may need to read)
Friend knocked on my door, his new Next door neighbor only had power to half his RV.. Can I help? I grabbed a multi-meter and as we crossed the drive I ask if he had an inverter (Did not know) well he opened the battery bay. Nothing to look at there. So I had him open the next bay.. There it was. Lovely little Tripp-Lite With a lovely Tripp-ed breaker.
He goes back inside and his wife asks "Does he think he can fix it" Husband answers "he already has". (there were two breakers so it was easy,, Same kind Onan uses No "Tripped" position just on and off)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times