I thought of your post when I tested my reworked system last weekend. I put in a 2200W Giandel Inverter, GoPower transfer switch and replaced all of the 2 AWG (4 AWGx2) with 2/0 AWG. Also traded out the 250 amp breaker for an 250 ANL fuse.
The air conditioner worked fine at both the low and high setting 1,200 vs. 1,400 watts. The darn High Pointe so called 900 watt microwave still cut out at 1,600 watts. Lesson, it just hates inverters! Thanks so much for the post, my wife and I would rather have boondock air conditioning than a microwave anyway. I