yes, you can (and I do) turn off the converter. AND it can draw WAY more than 5A, depending on battery state of charge. if the batterie(s) are low, draw can easily be in the 12-15A range. In fact, my 65A converter pretty much max's out one honda 2000.
Make sure ALL the other stuff is turned off as well, such as fridge electric (turn it to gas)
Turn on ONE AC unit, let it run for 5-10 minutes to allow the head pressure to drop some and the running current to drop down some then with the ECO throttle OFF on the hondas try turning on the second one. Your going to be marginal.
2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!