I was able to get the IOTA into boost mode manually. I was measuring some draws and in the process brought the battery voltage down to 12.73 (batts in float prior to this). The converter was unplugged from 120V but still connected to the batts during the measurements. Total time disconnected was about 30 minutes. I noticed when I first unplugged the converter that there was a .25A draw on the batteries for about 10 seconds then it dropped to nothing (batt disconnect switch off). If I were to guess that was the IQ4 doing some voltage sample or something. When I plugged the converter back in, it jumped to 14.4V within 20 seconds or so and after a few minutes climbed to 14.8V. As soon as I plugged in it did 55A, then dropped quickly to 53A and held that for a couple minutes then started tapering. Batteries were 100% full (1.285 SG) prior to my measurement testing.
A side note: the front entertainment center draws 13.9A while a TV show is on (inverter draw from batteries). Almost half of which is the TV itself (6.2A). I'm going have to check how it's mounted and see about getting my Vizio in there instead.