Been lurking here following this thread. I have a similar question but different hardware. I have a Kuerig coffee maker that brews one cup at a time. The initial warm-up lasts around or under 3 minutes drawing 1500 watts. The water tank re-heat cycle after brewing is 200-400 watts and lasts around 60 seconds. At idle the Kuerig draws 60 watts.
I would be running this with a 3000 watt inverter solely for the coffee maker. Trying to keep weight down I would like to keep it to 1 group 27 or 31 deep cycle. How long do you guys think the one battery would go if starting from fully charged?