I like another poster don't drink coffee but my wife does. On our recent road trip she even bought the smallest coffee maker at Walmart because she doesn't like to use the French Press.
We actually have a great real world example of the abilities of these batteries. To start with, we have 200w of solar on the roof coupled to a 100AH Battle Born LiFePo battery. I also have a 2000w inverter wired up with some very short and very thick cables.
Our usage was determined by our twin girls who needed milk about every four hours. We had two bottle warmers (but for space reasons eventually just used a single warmer) that pulled about 350 watts each. Each bottle required about 4 minutes of heating. That is 8 minutes times 5 feeds per day. The wife also ran her coffee maker once per day and that was somewhere around 500w I think for maybe 7 minutes. That is 47 minutes a day of heavy draw on the battery and we did this for nearly three weeks straight. We only had one time where the camper battery got low on us and required use of the DC to DC charger from the truck (normally not connected for reasons behind this post). We did stay at sites with hookups when possible but it wasn't all th time.
My take away is these heavy loads work just fine on a good battery. I think I will add another 200w of solar to help with charging as I think in cloudy or shady conditions, the panels would have a tough time keeping up. Note that because we had hookups from time to time, our experience isn't the same as someone boondocking for three weeks but then I don't think many other people are warming two bottles every four hours in addition to their coffee.
