don't know if your checking this post at all, but it is uncomon to be able to run a ac off a 2000 watt inverter thats why I asked what brand and model so I could look up the specs. Part of the problem is you are not starting with with a fully charged battery , close but not full, then the drag down of lead acid batteries, once you put them under a very large load, is dropping the voltage even further to the point of hitting your low voltage alarm.
so how do you fix that, well as mentioned add more batteries, but I would recomend another 4 not just two if it is dropping off that fast, or switch to LiFePO4 which have less of a drop down effect when under load. you just have to do the math and see which is more afordable for one, less weight and better in the long run with any other modifications. I know when your talking about 8 GC batteries space is a premuim as well as weight, but that would get you about 400ah you could use. if you went LiFePO4 you could get the same preformance out of 4 100AH batteries or two 200AH batteries for a total of about 120 lbs as aposed to 560lbs
Yes my Go Power 2000w inverter runs my Dometic 13.5 with ease. For about the same space and weight of my 4x GC2 I DIYed a 1200 Ah LFP battery. Easily holds voltage above 13.0 under extended heavy load.
Although my 4x GC2 would run the A/C for at least a few minutes while testing. Never tested how long they would run the A/C.
did you add an easy start? i have the gopower 2000watt inverter in my 5th and have never been able to run it.
I would imagin the age of the batteries could be playign a part also if that is so, to many unknowens and the OP isn't coming back to answer it seams.
